Grade 9 Bolts Fastenal

Under over tightening of fasteners can result in costly equipment failure or personal injury.

Grade 9 bolts fastenal.

Grainger s got your back. Cap screws and hex bolts have heads designed for tightening to exact specifications with ratchets or spanner torque wrenches. And shorter in lengths. In threads per inch 307a astm a307 grade a sae j429 grade 5 sae j429 grade 8 f n l g 9 fnl grade 9 clamp load lbs tightening torque clamp load lbs tightening torque clamp load lbs tightening torque clamp load lbs tightening.

Extreme caution should be used when using a formula for torque tension relationships. Inch fasteners those commonly used in north america will have a grade or astm rating. Grade 8 is near the high end of the grade scale although there are higher grades and strengths for more specialized fasteners. Use them for heavy duty stamping applications as well as earth moving machinery such as bulldozers and excavators.

Easy online ordering for the ones who get it done along with 24 7 customer service free technical support more. 9 at the top of the scale this grade offers the most strength in a joint. Property class often just class specifies metric fasteners. The zinc yellow chromate plating resists corrosion in wet environments.

For bolts and screws longer than 6 in. In lbs lbs lbs lbs. Special markings on screw heads and nuts identify the fastener s grade. Compared to a grade 5 bolt a grade 8 socket head cap screw or grade 9 bolt would increase the bolt strength roughly 25 50.

The ductility of a bolt decreases as the hardness and strength increases. Torque is only an indirect indication of tension. Searching for grade 9 cap screws hex bolts. Rev 3 6 09 torque tension relationship for a307a grade 5 8 9 bolts in sq.

Bolts secure material by applying pressure from the head of the bolt. 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. Grade 1 requirements shall apply. However as highlighted below there are a few issues that must be considered when using higher strength bolting products.

Grade 9 steel hex head screws are marked with nine radial lines. They fit with corresponding tapped holes and nuts to create bolted joints.