Grade 8.8 bolts are used in railroad equipment, motors, engines, and processing equipment. 3.6. ASTM A354 BD is used for structural bolts, while SAE J429 Grade 8 is an automotive specification. Type T-Slot Bolt System of Measurement Inch Slot Width (Inch) 5/8 Length Under Head (Inch) 2-3/4 Thread Size 5/8-11 Material Steel MSC #: 01841709. Grade 5 alloy steel is medium carbon zinc-plated alloy steel that was treated with heat in order to increase hardness. Made from Grade 8 steel, these screws can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. For critical engine situations such as cylinder-head bolts and differential gearsets, the Grade 8 bolt is the way to go, where proper torqueing preloads the clamped joint with minimal bolt stretch. They are at least 25% stronger than medium-strength steel screws. Grade 8 / Grade G. Grade 8 bolts are more hardened than Grade 5 bolts. Using fine-thread fasteners is especially important for automotive applications due to the many inherent vibrations sent throughout the vehicle while in motion. but it is not as strong as class 10.9. Thats all I can offer without knowing your application. Grade 8 bolts have 6 evenly spaced radial lines on the head. Class 10.9 is similar to grade 8. It is also quenched and tempered at 800 F leading to its strength. These grades are set based on a system created by the SAE, or Society of Automotive Engineers). Always match bolts and nuts of comparable grades (use a Grade 8 nut with a Grade 8 bolt; use a metric grade 10 nut with a 10.9 grade bolt, etc.). This type of fastener is stronger and are used when a more demanding application is needed like in automotive suspensions. 5 fasteners. Grade G nuts are used with Grade 8 bolts. The 5 will bend in shear before it breaks, 8 in shear will snap. These bolts are the strongest and most durable bolt fasteners ever made. If you want to be extra cautious you can use some of the above grade 8 "bolts", such as Bowmalloy, supertanium,or Karalloy, etc. Their marking system uses raised dashes on the head of the bolt to denote strength. Grade 8 Grade S Grade S bolts have the capability to withstand 45 to 49.9 MT of stress per 6.45 cm 3. The common class (grades) for metric are 5.8, 8.8, 10.9 and 12.9. However, when looking at objective evidence, Grade 8 always comes out much better for automotive use.There's a good, succint article about this subject here. 3M Professional Grade Rubberized Undercoating helps protect the undercarriage of cars, trucks, vans and recreational vehicles from corrosion and abrasion. You probably need a standard and metric set. Class 10.9 is stronger than class 8.8, and is commonly found in high strength automotive applications. Never use for engine components, such as Rod, head, flywheel, or anything requiring ASTM Gr. A bolt with a six sided head. The automotive OEMs use what it needs to be safe and nothing more since there is a difference in cost between grade 5 and grade 8 (or metric 8.8 and 10.9). Grade 10.9 bolts: As these bolts are most often used in the automotive industry, they are also referred to as car bolts. I suppose it is correct to say that 8.8 is 'mid grade', however it is still high tensile. Grade 8.8 10.9 ASTM A325 High Strength Hot Dip Galvanized Hex Bolt and Nuts. Class 8.8 is similar to grade 5. The difference in bolt grade is that its manufacturing materials are different, and the prices of different materials in the market are also different. Each bolt grade has an ideal tightening torque for maximum clamping force without breaking. Steel fasteners are usually made of Automotive. Leaf Spring U Bolt Kits For Heavy Trucks, Medium and Light Duty Trucks And Auto Applications. With the price of the 2.5 inch hitches, I do not leave it in, it really hurts when you walk into it. Grade G is roughly equivalent to Grade 8. 7350PCS Coarse Grade 8 Bolt, Nut, Washer, Lock Washer & Lock Nut Assortment. Grade 8 bolts. Grade G nuts are used with Grade 8 bolts. High tensile steel bolts. Are Grade 8 bolts more brittle than Grade 5? Since the OEMs manufacture millions of vehicles each year, the difference in a few cents per fastener adds up to a lot for them." They are usually designed for specific makes/models of vehicles. We recommend using grade 8 nuts, flat washers and high alloy lock washers with any grade 8 bolts / hex cap screws. The first figure in the case of an 8.8 grade bolt indicates that the Tensile Strength is at least 800MPa. They are used in high-stress applications, such as valves, pumps, motors, automotive suspension systems, aerospace, military, marine, and heavy construction projects. Grade 8 works better in pull situations. There are many that do not understand bolts by grade and torque specifications. What is the shear strength of grade 8 bolts 1/4 1 mechanical applications such as automotive suspensions, cranes, etc. They can be identified by the five radial lines on the head of the bolt and are usually (but not necessarily) gold in color. This is a metric nut grading similar to the SAE grade 8 classification, which is used in conjunction with Class 10.9 bolts. The common class (grades) for metric are 5.8, 8.8, 10.9 and 12.9. When dealing with metric fasteners, the The tables below show the physical properties of 430 grade stainless steel (SS430). Grade 8 bolts are made of a medium carbon alloy steel that is also quenched and tempered and are the most durable bolts you can purchase for automotive use. Grade 8 hex bolts have 6 marks on the head. Grade 8 bolts are usually found in critical fastening applications, such as suspension parts, cylinder head bolts and flywheel bolts. Grade 5 bolts are great for shearing forces, but are lousy under pulling or compressing forces because they can stretch or compress. Products. The automotive OEMs use what it needs to be safe and nothing more since there is a difference in cost between grade 5 and grade 8 (or metric 8.8 and 10.9).

In Brief: SAE Bolt Torque Chart Grade 2, Grade 5, Grade 8. It is commonly found in automotive applications. Grade 8.8 Bolts are manufactured using medium carbon steel that has been quenched and tempered. Systems of Bolt Grades. Bolts are made of different grades of steel. Bolt Grade Markings. The most common grading system used for bolts in the U.S. SAE Bolt Grades. This bolt is an ASTM specification bolt thats readily available in many home improvement and automotive stores.Metric Bolt Grades. Alloy steel Grade 8 Flat Washers USS, Zinc Plated A grade 8 bolt, if it's a really good quality bolt, is a good start, but nails are made of crap metal and they are just AWFUL for hardening without cracking or crystallizing All of the bolts with good welds pulled apart in other places then the weld Head Marking A breaker bar or long handled ratchet will There are several grades of bolts but the most common for SAE are 2, 5, and 8. Bolts with yellow zinc coating finished in Haihao Group. Depend on grade 8 hex flange bolts for use in applications that are demanding. First, the Hitch Pin is not being steched, so there is no tension load on the length of the pin, the only load is in "Shear". this is why, single shear and double shear tables are available for bolted connections. While you are it, buy an adjustable wrench for the odd occasion when a bolt or nut falls between sizes. Deck Lid Striker Bolt.

Make sure this fits by entering your model number. Class 10.9 is stronger than class 8.8, and is commonly found in high strength automotive applications. For example A2-70 head mark stainless steel bolts are best for Non-active automotive use. Condition: New. The flange distributes pressure over the surface, eliminating the need for a washer. Grades-5 & 8 Carriage Bolts Grade-5 3.6. Each grade has a specific bolt strength. Add to Cart.

Grade G is roughly equivalent to Grade 8. The tensile strength of Class 10.9 is similar to grade 8. Class 10.9 is similar to grade 8. Generally, the price of high-strength bolts will be much higher than that of ordinary bolts. Grade 8 bolts are suitable for use where very high strength is required, such as suspension bridges, wind turbines, and other heavy-duty applications in both light steel and concrete structures.. Grade 5 bolts can also be used in heavy-duty steel structures but not as recommended since This strength of nut is used in automotive, and structural industries, as well as in high temp applications. llonning, Apr 10, 2008. Hex flange bolts are greatly used in areas that are hard to reach since the flange does the work of a washer in distributing pressure. It is made of alloy steel and has six radial lines on the top of the bolt head. Grade 8 bolts have a tensile strength of 150,000 pounds per square inch. We recommend using grade 8 nuts, flat washers and high alloy lock washers with any grade 8 bolts / hex cap screws. Ferriolom Registered Automotive fasteners are a collection of products that are used in automotive and vehicle assembly. It is commonly found in high strength automotive applications. I worked in a shop so getting bolts was not a problem. Try to purchase a strong alloy, such as chrome-vanadium, as these tend to last for years with little wear and tear.

Some bolts are not available in different strength grades while certain steel types are offered in SAE (Society of Automotive Engineers) Grade 2, 5 or 8; head markings identify grade. Hard-to-Find Fastener 014973240226 Grade 8 Coarse Hex Flange Bolts, 3/8-16 x 1, Piece-50 There's a 10.9 in metric. Internet # 303219802Model # GR-14C-MP rust and corrosion on items like tools, and sporting equipment. Motor Mount Bolt. The coating may also be used to protect wheel wells, quarter panels, interior sides of fenders, the underside of the hood, the bottom sides of floor pans and more. Metric bolts use their own numbering system as well, unmarked bolts are often used for light-duty automotive applications such as plastic retention or used with body retaining clips. SHARE POST #3. rockable, Chavezk21, sidevalve8ba and 1 other person like this. The common class (grades) for metric are 5.8, 8.8, 10.9 and 12.9. A low carbon steel for general use. ; MADE IN AMERICA WITH AMERICAN DRAWN STEEL - Every ROCKETSOCKET impact grade extractor socket is designed, engineered and manufactured in the USA with American Drawn Steel to meet or exceed all professional tool standards. For instance, a common size 3/8-inch diameter hex bolt has 16 threads per inch for a coarse bolt versus 24 threads per inch for the fine-thread version. We've all heard discussions about Grade 5 vs Grade 8 bolts, including the oft-espoused opinion that Grade 8 bolts are more brittle than Grade 5, so generally shouldn't be used unless specified. Reaction score. (8.8 vs 10.9 GRADE 8 HEX HEAD CAP SCREW / BOLT YELLOW ZINC.

Grade 8 Hex Flange Bolts. Call: 800.837.0141 | 419-729-2141 [emailprotected] Show Menu. Ideal in salt water and chlorine environments. That bolt is always Grade 8 and uses SAE threads. Grade 8 High Tensile bolts, imperial thread for use in older automotive applications, earthmoving industry, Trailer manufacturer & mining. Grade 5 falls between grade 2 and grade 8 in strength, and is commonly found in automotive applications. Class 8.8 Zinc Plated Steel Hex Bolt, M10-1.5, 60mm Length. Reply. ARP bolts vary in strength Yellow Zinc Grade 8 Hex Bolt (2 per Bag) (1) Model# CS8YC-100-300 $ 5 55 /bag The square neck keeps these bolts Open Ai Api The square neck keeps these bolts. Grade 8 Bolts and fasteners are comprised of carbon-alloy steel, heat treated in a carbon controlled atmosphere and are generally the most durable and reliable fastener. Grade 8 bolts have the highest ratings with tensile strength of 150,000 psi. Grade 8 bolts are used marine, military, aerospace, off-road vehicle markets and related mechanical applications where stress and strong load bearing pressure is required. Well the engine stand has 4 mounting points and I'm going to use all of them. 3/8-16 x 2 1/4 Hex Head Bolts, Stainless Steel Grade 18-8 Hex Head Cap Screws, Partially Threaded 1 inches of Thread, Coarse Thread, Thread Diameter: 3/8 inch, Length: 2 1/4 inches (Quantity: 50) Cicidorai M5-0.8 x 50mm Button Head Socket Cap Bolts Screws, 10.9 Grade Alloy Steel, Black Oxide Finish, Machine Thread, Allen Socket Drive, Quantity 50 Common uses for grade 8 bolts are for military, aerospace, or marine related mechanical applications where high stress and strong load bearing pressures are a major factor. Class 10.9 is stronger than class 8.8, and is commonly found in high strength automotive applications. Differential Shaft Lock Bolt. The standard Class 4.8 Carbon Steel Bolt has been manufactured from Low or medium carbon It is made of alloy steel and has six radial lines on the top of the bolt head. Grade 2,5, and 8 bolts are usually plated with a slightly blue-ish or yellow zinc coating,or are galvanized,to resist corrosion. Refer to the charts to find the ideal tightening torque. Strain hardened bolts can be anywhere between 60,000 and 100,000 psi in yield strength. High-Strength Grade 8 Steel Flanged Hex Head Screws. Like pliers, wrenches are necessary for practically every automotive project. Grade G is roughly equivalent to Grade 8. Automotive trim; Air Filter; Barbecue (BBQ) Grill; Wall Mount Hood; Kitchen Exhaust Hood; Flanges; Aren't grade 8 bolts with full thread a special bolt? Home; Products. 7350 PIECE GRADE 8 ZINC YELLOW COARSE THREAD.

18-8 stainless steel head marks indicates 18% chromium - 8% nickel. It is the most common form of high tensile material and is usually stocked in plain finish or zinc. Refer to the charts to find the ideal tightening torque. Product Name. FOR LARGER QUANTITIES PLEASE GIVE US A CALL, 1-800-624-6735. Always follow the vehicle or aftermarket component makers recommendation for fastener grade. A low carbon steel for general use. The difference in bolt grade is that its manufacturing materials are different, and the prices of different materials in the market are also different. Location: Charleston, United States. The common class (grades) for metric are 5.8, 8.8, 10.9 and 12.9. Each grade has a specific bolt strength. Zinc plated grade 8 steel yellow. Car Fluids & Chemicals. Brake Bleeder Screw Set. Lubricants.

High tensile Grade 8 bolt capability in tension (failure) = 150,000 lbs / in2 x .03349 in2 = 5024 lbs minimum. 4 GO NUTS Nuts are generally made from low Is Grade 8 or 10.9 stronger? A fastener (US English) or fastening (UK English) is a hardware device that mechanically joins or affixes two or more objects together.

Pro-Grade Multi-Purpose Grease Cartridge is the best choice for high quality lubrication and corrosion protection. Norway, Malaysia, United Arab Emirates, Turkey. The higher-grade number indicates a higher strength and flow stress for the bolt material. . 7/16-14 X 10 HEX CAP SCREWS GRADE 8 COARSE [HC8213] Price: Call for Pricing. Never use any threaded fastener below a Grade 5 (or 8.8 metric) for any automotive application, regardless of the area of use. Essentially, you count the raised marks on the heads of SAE bolts and add 2 to get their grades.

Grade 8 steel has been hardened even more so it can be used in particularly demanding applications like automotive suspensions. I hope that will be enough! Grade 8 bolts have a tensile strength of 150,000 pounds per square inch. Lock Nut. Thus they are stronger and are used in demanding applications such as automotive suspensions. Works just the opposite if you reverse the situation.

Is Grade 8 or 10.9 stronger? Clamps, Inc. is an ISO 9001:2008 Certified Manufacturer of Automotive & Heavy Duty Muffler Clamps, Stainless Steel Band Clamps, Industrial Grade U-bolts, Industrial Grade Custom Bent Bolts & Custom Stampings. Grade 8 / Grade G. Grade 8 bolts have been hardened more than grade 5 bolts. Grade 8 bolts have 6 evenly spaced radial lines on the head. Theyre best for heavy loads and high stress. Brake Hose Bolt Washer. Grade 8 USS Bolts. High-Strength Grade 8 Steel Square-Neck Carriage Bolts Made from Grade 8 steel, these bolts can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. #8.

Is Grade 8 or 10.9 stronger? Class 10.9 is stronger than class 8.8, and is commonly found in high strength automotive applications. In general, fasteners are used to create non-permanent joints; that is, joints that can be removed or dismantled without damaging the joining components. A low carbon steel for general use. Grade 8 bolts are heat-treated and have a tensile strength of 150,000 PSI. A low carbon steel for general use. SAE Grade 2 Bolts: Grade 2 bolts are a standard hardware grade of steel. Online shopping for Industrial & Scientific from a great selection of Hex Bolts, Carriage Bolts, Eyebolts, Expansion Bolts, U-Bolts, Square Head Bolts & more at everyday low prices. I also am a big fan of using a grade eight bolt, my receiver is 2.5 inch, but same 5/8 bolt I use a flange bolt with a hard washer, and a flange nut, with a hard washer. They have high tensile strength and operate well in a variety of situations. 1-1/4-7 X 2 HEX CAP SCREWS GRADE 8 COARSE [HC8379] Price: Call for Pricing. 8 or Gr. There's no such thing as a grade 10. What is a grade 8.8 bolt? Grade 5 will flex as it fails and tend distort and stretch and may actually hold together a bit. Class 10.9 is similar to grade 8. Find many great new & used options and get the best deals for Qty 2 Hex Head Bolt 3/8" UNF x 2" Black High Tensile Grade 8 Screw at the best online prices at Cheap Price with Best Quality, Easy Return. Grade 8 bolt. This has two distinct advantages over the Grade 8 Bolt. The off road vehicle market also has a need for grade 8 bolts Buy It Now. 8.8 is the equivalent of a Grade 5 and 10.9 is the equivalent of Grade 8. Grade 8 bolts have a high tensile strength rating due to its medium-carbon alloy steel composition that has These bolts come in two different size ranges 1/4 to 1 and 1 to 1 1/2, which have the proof load of 85000 psi and 74000 psi respectively. The square neck keeps these bolts from turning when tightening a nut. Hex bolts. Grade 8 has 0.28-0.55% carbon, 0.030% max phosphorus, and 0.050% max sulfur. Grade 2 bolts are cheap but not very strong, grade 8 bolts are the strongest and most expensive, and grade 5 bolts are the most common. Grade 8 is "stronger" as in tensile strength or force it takes to break it, but when they go the snap. Non-active means not used on suspension and drive line components. Grade BC Bolts, Studs Alloy Steel, Quenched and Tempered 14 thru 2 2 thru 4 105,000 95,000 109,000 99,000 125,000 115,000 ASTM J429 Grade 7 Bolts and Screws Medium Carbon Alloy Steel, Quenched and Tempered 14 thru 1 105,000 115,000 133,000 SAE J429 Grade 8 ASTM A354 Grade BD No Grade Mark SAE J429 Grade 8.1 Stainless steel 316 (A-4) Also known as A-4 stainless, 316 is a highly corrosion resistant grade of stainless steel. Low tensile for Metric is class 4.6. Grade 5 works better in shear situations. One of the biggest mistakes in automotive work, is using the wrong kind of bolt.

Grade 2 bolts are cheap but not very strong, grade 8 bolts are the strongest and most expensive, and grade 5 bolts are the most common. Thus they are stronger and are used in demanding applications such as automotive suspensions. Class 10.9 is similar to grade 8. Dec 3, 2015. Generally used bolt grades in the market are 4.8, 8.8, 10.9, and 12.9. Get free shipping on qualified Grade 8 Hex Bolts products or Buy Online Pick Up in Store today in the Hardware Department. Thus they are stronger and are used in demanding applications such as automotive suspensions. SAE bolt grades indicate the strength of the bolt. Photo 2. The first number represents 1 / 100 of the tensile strength, and the second number represents 10 times the ratio of yield to tensile strength. To improve its resistance to corrosion, it may receive additional finishesand coatings.

Is Grade 8 or 10.9 stronger? The performance level of bolts is divided into 3.6, 4.6, 4.8, 5.6, 5.8, 6.8, 8.8, 10.9, 12.9 from small to large. I need to cut extra threads on the unthreaded shank of two coarse 7/16 Grade-8 bolts, reason being I need two axle-flange studs, such that a nut will tighten against the axle-flange, and then a second nut holds the bracket for the Veederoot hubometer. Class 10.9 is stronger than class 8.8, and is commonly found in high strength automotive applications. Grade 8 / Grade G. Grade 8 bolts have been hardened more than grade 5 bolts. $. Engine Cylinder Head Nut Washer Set. Blaster 14 oz. Carriage bolts have a smooth, rounded head for a finished look. Grade 8 bolts have 6 evenly spaced radial lines on the head. Online shopping for Industrial & Scientific from a great selection of Hex Bolts, Carriage Bolts, Eyebolts, Expansion Bolts, U-Bolts, Square Head Bolts & more at everyday low prices. A tempered medium carbon steel. This type of fastener Class 4.8 Bolt could either have Coarse thread and fine pitch thread formation. Chile, Italy, Iran, Singapore. There exists an often quoted myth, that Grade 5 bolts are better in shear than Grade 8 since they will bend before breaking. Not true. Shear strength of alloy steel is approximately 60% of its ultimate tensile strength. Reference to Table 1 shows that the yield strength of a Grade 8 bolt is higher than the ultimate strength of a Grade 5 bolt. 10 indicates 1/100 of the tensile strength of the bolt, which means that the tensile strength of this grade of bolt must reach 1000MPa, which may actually be higher than 1000MPa. Since the OEMs manufacture millions of vehicles each year, the difference in a few cents per fastener adds up to a lot for them." Metric nuts are marked with a single or double numerical symbol (8, 10 or 12). Felt Washer. Grade 8.8 high tensile steel is often referred to as the structural grade for bolts. Youll Find fine thread bolts in those places where specific types or specific grades of bolts are needed. Here is a comparison chart. my Bolt size could be the reason why 10.9 is specified over 8.8--a larger bolt may be OK in 8.8, but a smaller one requires more tensile strength (in regards to your Porsche reference). Used in railroad equipment, motors, engines and processing equipment, grade 8.8 bolts exhibit In applications such as suspensions, a very high number of load/unload cycles can produce work hardening, which produces an immediate, or catastrophic failure.