Grade 9 Bolts Specifications

Head marking class and material nominal size range mm mechanical properties.

Grade 9 bolts specifications.

They are similar to grade 8 but have a tensile strength of 180 000 psi compared to grade 8 at 150 000 psi. The highest metric. 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. Grade 9 cap screws hex bolts.

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. 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. Strength is similar to grade 5. Yield strength mpa min.

Grade 9 yellow zinc chromate 180 000 psi. L9 pfc9 or f911. 5mm 100mm. The zinc yellow chromate plating resists corrosion in wet environments.

All sizes below 16mm. Made in the usa. For bolting specifications that do not have a published proofload it is usually calculated at 92 of minimum yield strength. Use with astm a325 structural bolts.

Similar to grade 2. The screw head is designed to fit a ratchet or spanner torque wrenches allowing you to tighten the screw to your exact specifications. Grade bb bolts studs alloy steel quenched and tempered 1 4 thru 2 2 thru 4 80 000 75 000 83 000 78 000 105 000 100 000 astm a354 grade bc bolts studs alloy steel quenched and tempered 1 4 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. 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.

Grade 9 hex head bolts. Class 10 9 alloy steel quenched and tempered. 16mm 72mm. 1 proofload is the published number that full size headed bolts are tested to.

Grade 9 steel hex head screws are marked with nine radial lines. Wholesale grade l9 fasteners. Use with astm a325 structural bolts. Proof load mpa min.

Similar to grade 8. Tensile strength mpa class 8 8 medium carbon steel quenched and tempered. 180 000 psi tensile strength. Special alloy steels and heat treatments are used to achieve 180 000 psi tensile strength.

Grade 9 steel. 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. Similar to grade 5.