3 8 Bolt Torque Value

The following torque values are suggested maximums based upon actual lab testing on clean and dry or near dry fasteners.

3 8 bolt torque value.

Unless otherwise specified use torque values listed above. Metric bolt torque table estimated with clamp load as 75 of proof load as specified in iso 898 1 8 8 10 9 12 9 socket head cap screw m6 m16. 800 m20 m30. Recommended bolt torque values for stainless steel and nonferrous fasteners inch series.

Torque values stainless steel bolt table chart. 5 8 8 8 10 9 class 5 8 class 8 8 class bolt head identification bolt size grade 2 grade 5 grade 8 metric bolt head identification bolt size inches. Coarse fine coarse fine coarse fine coarse fine coarse fine coarse fine 4 5 2 4 8 4 3. Sae grade 3 100 000 psi med carbon steel.

1 can be rearranged to express bolt force as. Values calculated using industry accepted formula t kdp where t torque k torque coefficient dimensionless d nominal diameter inches p bolt clamp load lb. Sae 0 1 2 74 000 psi low carbon steel. 3 8 15 17 23 26 33 37 20 22 18 20 16 18 7 16 24 27 37 41 52 58 31 33 29 31 26 27 1 2 37 41 57 64 80 90 43 45 40 42 35 37 9 16 53 59 82 91 115 129 57 63 53 58 47 51.

The torque values can only be achieved if nut or tapped hole has a proof load greater than or equal to the bolt s minimum ultimate tensile strength. Pressure wax as supplied on high strength nuts 10 hot dip galvanized 25 and plain non plated bolts as received 20. Torque values for 1 4 and 5 16 in series are in inch pounds. F t k d 1 l 100 1a example dry vs.

Sae grade 5 120 000 psi med. Grade 2 5 and 8 values are for plated bolts. The torque required to achieve this force with a dry bolt is calculated to 2022 nm. Grade 2 grade 5 grade 8 18 8 s s bronze brass.

Astm a307 utilized 75 of 36 000 psi. Recommended bolt torque table size recommended torque. Ansi hardware design guide design torque and force calculations. Torque tolerance 0 15 of torquing values.

Clamp load calculated as 75 of the proof load when specified by the standard.