grade 8 bolts specifications

Grade 8 8 Bolts and High Tensile Class 8 8 Hex Nuts Studs

SAE bolt grades indicate the strength of the bolt Each bolt grade has an ideal tightening torque for maximum clamping force without breaking 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 Refer to the charts to find the ideal tightening torque SAE J429 Grade 5 K 0 15 K 0 17 103 121 128 171 105 120 141 3706 245 1817 2371 2688 3162 278 1363 46 82 92 109 K 0 20 FNL Grade 9 Clamp Tightening Torque Load Tightening Torque SAE J429 Grade 8 K 0 15 4169 K 0 15 K 0 17 K 0 20 Unified Coarse Thread Series Fine Thread Series 3544 K 0 15 383 91 325 78 287 68 327 157 K 0 17 281 GRADE 5 SAE GRADE 8 AND SAE GRADE C SAE J429 BOLT MATERIAL The three physical grades of steel referenced in this Specification are SAE Grade 2 SAE Grade 5 and SAE Grade 8 The Grade 2 material is low or medium carbon steel Grade 5 is medium carbon steel quenched and tempered Grade 8 is medium carbon alloy steel quenched and tempered ASTM A325 Bolt Strength ASTM A325 bolt strength are summarized in the table bellow inluding tensile strength yield strength and hardness etc Notes The stress area is calculated as follows A s 0 7854 D 0 9743 n A s stress area in 2 D Grade B5 Bolts Screws manufacturing technical and or design specifications and data r eceived by All Pro Threaded from the products manufacturer or taken from consensus standards and is in no manner originated Grade 8 ASTM A354 Grade BD

B7 vs Grade 8 All America Threaded Products

Strength is similar to Grade 8 Use with ASTM A325 structural bolts Grade 2 Low strength Grade 2H Nuts Strength is similar to Grade 5 Use with ASTM A325 structural bolts Grade 5 Medium strength Grade 8 High strength Metric Class 4 Similar to Grade 2 Metric Class 8 8 Similar to Grade 5 Metric Class 10 9 Similar to Grade 8 Metric A variety of Grade 8 bolts are available from Lighting Bolt amp Supply See the latest inventory on Grade 8 Bolts currently available by looking through the online catalog If you don t find what you need give us call at 225 272 6200 or email us at sales lightningboltandsupply com and we ll be more than happy to help Properties shown are those of coarse 8 pitch thread heavy hex nuts Hardnesses are Brinell Hardness Numbers The nut manufacturer at his option may add other markings to indicate the use of atmospheric corrosion resistant steel Specifications ASTM A grade 8 bolt is stronger than the more commonly used grade 5 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 Grade 4 6 Bolt Specification 4 8 Expansion 8 Bolts And Nuts Kit Metric Imperial Assortment M8 3Inch Nut Plow Grader Blade 0 10 5 00 Piece 1000 0 Pieces Min Order

Bolt Torque Chart AFT Fasteners

Bolt Grade Markings and Strength Chart Print this page US Bolts Head Marking Grade and Material Nominal Size Range inches Mechanical Properties Proof Load psi Grade 8 Medium carbon alloy steel quenched and tempered 1 4 quot thru 1 1 2 quot 120 000 130 000 150 000 Grade A325 Carbon In the case of a 8 8 grade bolt the first figure signifies that the Tensile Strength is at least 800MPa The second figure signifies that the fastener will begin to yield at 80 of the Ultimate Tensile Strength i e at least 640MPa Strength Specifications of Stainless Steel ASTM A354 BD is used for structural bolts while SAE J429 Grade 8 is an automotive specification Both specifications are heat treated and tempered at 800 176 F which creates a very strong part but increases brittleness more than comparative specifications 8 8 High Tensile Structural Bolt AS1252 Allfasteners AS1252 structural bolts are a complete assembly of bolt nut and washer Selected by those who depend on quality products installed in there project to meet the requirements of Australian structural standards Class 8 8 high tensile grade Hot dipped galvanised Code bolt capacities are based on grade 4 6 bolts and Chapter 18 reviews and simplifies the formulae given in Annex G for the derivation of bolt capacities and considers the improved performance that may be achieved using grade 8 8 bolts

Bolt Grades Torque Specs cahart Industrial Metal Supply

39 rows nbsp 0183 32 Grade 8 Standard Specification for Carbon and Alloy Steel Nuts for Bolts for High Pressure or Steel Bolts SAE Grades For metric bolts strength is according ISO 898 Mechanical properties of fasteners made of carbon steel and alloy steel described by quot property classes quot with designations 4 6 4 8 5 8 8 8 9 8 10 9 and 12 9 Property Class Head Marking Grade 8 Bolts Quick Facts A grade 8 bolt is stronger than the more commonly used grade 5 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 High Tensile Grade 8 8 Hex Bolt and Class 8 8 Allen Bolts manufacturer in India The specification for 8 8 Grade Bolt standard covers all high tensile fasteners like Bolts Screws Studs This type of 8 8 Bolt could either have Coarse thread and fine pitch thread formation The standard Grade 8 8 Bolts has been manufactured from Low or medium carbon Alloy Steel Grade 8 8 high tensile steel is often referred to as the structural grade for bolts It is the most common form of high tensile material and is usually stocked in plain finish or zinc It can be plated in many other coatings For high tensile steel grade 8 8 a torque wrench will be required for the tightening of said product

SAE J429 Grade 8 Fasteners SAE J429 Grade 8 bolts

174 Bolts are engineered to exceed SAE Grade 8 standards and ISO 10 9 strength specifications for longer wear life and improved reusability Over 1 700 Bolt Types We offer over 1 700 different bolt products with various grip lengths thread sizes and finishes Grade 8 bolt Gr 8 bolt capability in yield stretch 130 000 lbs in2 x 03349 in2 4354 lbs minimum High tensile Grade 8 bolt capability in tension failure 150 000 lbs in2 x 03349 in2 5024 lbs minimum Grade 8 hex bolts have 6 marks on the head tensile strength is 150 000 lbs per square inch ultimate shear strengthASTM A193 Grade B8 Specification for high tensile bolts screws stud bolts anchor bolts threaded rods and other externally threaded fasteners made from 304 stainless steel ASTM A193 Grade B8 is a standard material specification for corrosion resistant austenitic stainless steel fasteners for use in high tensile high temperature and special purpose applications such 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 Carriage bolts have a smooth rounded head for a finished look The square neck keeps these bolts from turning when tightening a nut This chart helps to identify the grades of bolts using the identification marks on the bolt s head along with the strength and hardness of common grade bolts Please note the bolt heads may also include the manufacturer s identification stamp especially with high strength bolts