Grade 9 Bolts Specifications

Use with astm a325 structural bolts.

Grade 9 bolts specifications. Class 10 9 alloy steel quenched and tempered. They are similar to grade 8 but have a tensile strength of 180 000 psi compared to grade 8 at 150 000 psi. Tensile strength mpa class 8 8 medium carbon steel quenched and tempered. Proof load mpa min.

Grade 9 hex head bolts. Wholesale grade l9 fasteners. Similar to grade 8. 1 proofload is the published number that full size headed bolts are tested to.

For bolting specifications that do not have a published proofload it is usually calculated at 92 of minimum yield strength. They are domestically made in the usa and fabricated from high grade alloy steel providing extremely high mechanical strength from an off the shelf fastener. Similar to grade 5. Our strongest screws these grade 9 steel screws have a tensile strength of 180 000 psi about 20 stronger than our high strength steel screws.

Use with astm a325 structural bolts. Grade 9 cap screws hex bolts. Grade 9 yellow zinc chromate 180 000 psi. Use them for heavy duty stamping applications as well as earth moving machinery such as bulldozers and excavators.

Head marking class and material nominal size range mm mechanical properties. Similar to grade 2. 5mm 100mm. Made in the usa.

F911 or l9 zinc yellow plated. Grade 9 steel hex head screws are marked with nine radial lines. All sizes below 16mm. 16mm 72mm.

Yield strength mpa min. Grade 9 steel. Strength is similar to grade 5. 180 000 psi tensile strength.

L9 pfc9 or f911. The grade 9 bolting system develops the highest clamp force available in a standard bolt nut assembly and it is frequently referred to by one of the folowing trade names. The bolt is stressed up to the proofload value and if there is no deformation elongation or fracture then the bolt is deemed to have passed. Special alloy steels and heat treatments are used to achieve 180 000 psi tensile strength.

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. The screw head is designed to fit a ratchet or spanner torque wrenches allowing you to tighten the screw to your exact specifications. Hex head cap screws are typically used to create a bolted joint in which a threaded shaft exactly fits a corresponding tapped hole or nut.