Material Bolt Grade Markings and Strength Chart. Figure B7. BOLT GRADES.S. Use of … Grade 8 Bolt Drill & Torque Chart in foot pounds . Image credits: MSC; CFC Distributors; Admiral Ship Supply . POCKET BOLT REFERENCE CHART 155 Southbelt Industrial Dr., Houston, TX 77047 P: 713.910.1028 F: 713.910.1227 800.460.1028 www.fluidsealingproducts.com Grade 2 calculations only cover fasteners 1 ⁄ 4 “-3 ⁄ 4 ” in diameter up to 6″ long; for longer fasteners the torque is reduced significantly. • All Grade BD products shall be marked "BD". Dry. Applications/ Advantages Has greater tensile strength than Class 4.6, 4.8 and 5.8 bolts. Lubricate all contact areas of the bolts and washers. High strength steel bolts with associated nuts and washers Manufacture’s identification mark, e.g., “X” (on head of bolts and screws and on one end of studs and studs-bolts). Recommended Bolt Torque Table Size Recommended Torque Grade 2 Grade 5 Grade 8 18-8 S/S Bronze Brass Coarse Fine Coarse Fine Coarse Fine Coarse Fine Coarse Fine Coarse Fine * #4 - - - - - - 5.2 - 4.8 - 4.3 - * #6 ... Grade 2, 5, and 8 values are for plated bolts. Always check with the equipment/bolt manufacturer. Abbrevi-ated HHMB or HXBT. Bolts with a wood thread and The only “gotcha” with the Grade 8 bolt is that, being harder, it is more “notch sensitive.” yield stress) bolt tension based on 50 percent yield b7 0.109 3/4 x 10 1-1/4" 0.334 105,000 17,550 120 110 137 154 165 172 219 329 120 7/8 x 9 1-7/16" 0.461 105,000 24,229 193 177 221 247 265 277 353 530 193 1x 8 1-5/8" 0.605 105,000 31,785 289 265 331 371 397 416 530 795 289 Lubricated refers to ... GRADE 5 COURSE THREAD BOLT size-pitch LUBRICATED WITH ANTI-SEIZE in-lbs Nm in-lbs Nm 1/4”-20 91 10 61 7 ft-lbs Nm ft-lbs Nm 5/16”-18 16 22 11 15 3/8”-16 28 38 19 26 yield of 41 tonf/in 2 These torque values are for guidance only! a-354 grade bd a-490 type 1 a194 grade 2h *zinc coated as per astm a153 **plain or zinc coated washers shall be f-436 with same finish (plain or zinc coated) as the bolt. SAE & ASTM Bolt Grade SAE & ASTM Bolt Grade Identification Marks . 6.1 Grades A and B bolts and studs shall conform to the hardness specified in Table 2. HEAVY HEX NUTS ASSEMBLED. AS/NZS 1252.1 – Bolt assembly functional characteristics. Also, keep in mind that torque specs will be less for bolts that have oil or lubricate on them than for clean, dry bolts. 1/4 thru 3/4 : 379.2118 . Lubricating the bolts is the suggested method. This head variant is the usual choice for the majority of SHS connections, or where architects favour an ‘industrial’ look. Grade C lock nuts equal 75% of the bolt proof loads specified for SAE J-429 Grade 8, and ASTM A-354 Grade BD bolts. U.S. Free Download Bolt Torque Chart (pdf, 45KB) and Customize with our Editable Templates, Waivers and Forms for your needs. Stainless steel grade chart ATLAS STEELS – SPECIALTY STEELS PRODUCT REFERENCE MANUAL SECTION 9: APPENDICES Printed November 2000 1 S9 Chemical analysis (%) specified Grade UNS No. Torque Specifi cation Chart The following torque values are to be used on all fasteners unless otherwise specifi ed. Use the following tables to determine bolt grade and torque specs. Hollo-Bolt® Type HB - Hollo-Bolt® Cavity Fixings 2 For such needs we offer heavy bolt heads and nut sizes. The Hollo-Bolt collar and hexagonal head of the Grade 8.8 bolt are evident above the surface of the steel section. Grade-B bolts have looser tolerances and can be manufactured in a cold or hot-forging process. The values shown in the chart are to be used as a mid-range guideline. Specs : Nominal Size (inch) Proof Load Stress (N/mm2) Tensile Strength (N/mm. Bolt users may require a bolt head or nut of greater width to compensate for wide clearance in bolt holes or unusually heavy loading. and Mechanical Properties Bolt Grade Identification Marking . properties of grade 8.8 bolt & nut (iso) bolt size pitch stress area mm2 bolt/stud/screw iso 898-1 gr.8.8 nut iso 898-2 gr.8 proof stress n/mm2 proof load kn tensile stress n/mm2 tour-que* n-m hard-ness hrc elonga-tion# % proof stress n/mm2 proof load kn hard-ness hrc m6 1 20.1 580 11.7 800.0 9.4 22-32 12.0 855 17.2 30 max A hex bolt with metric thread pitch made from medium carbon steel and heat-treated. Hex Bolts Carriage Bolts Lag Bolts Bolts with a hexagonal head with threads for use with a nut or tapped hole. in diameter or less, other than those excepted in 6.4, shall be tested full size and shall conform to the requirements for tensile strength specified in Table 3. 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