518
H Torque Table
The table below establishes the torque requirements for routine installation of threaded fasteners. These requirements apply to
fasteners made of steel, at a minimum engagement of 3.5 threads, including chamfer and countersink. For the most accurate
torquing, apply anti-seize compound to fastener threads before you torque the fastener.
Fastener sizes are listed as
Numbered Size - Threads Per Inch
. (For example, 2-56 means “a No. 2 screw with 56 threads per
inch.”)
Carbon Steel Fasteners (ANSI B18.6.3 - 1972)
Fastener Size
Into Alum. or Brass
25,000 psi ultimate
tensile strength
Into Steel
60,000 psi ultimate
tensile strength
Into Weld/Press
Studs or Nuts
Into Medium
Carbon Steel
Fasteners
100,000 psi
ultimate tensile
strength
2-56 25 ± 2 in oz 36 ± 2 in oz 30 ± 2 in oz *
4-40 62 ± 4 in oz 75 ± 5 in oz 70 ± 5 in oz *
6-32 122 ± 7 in oz 150 ± 10 in oz 135 ± 10 in oz *
8-32 11 ± in lb 18 ± 1 in lb 18 ± 1 in lb *
10-24 20 ± 1 in lb 25 ± 1.5 in lb 21 ± 1 in lb *
10-32 15 ± 1 in lb 29 ± 2 in lb 29 ± 1 in lb *
1/4 - 20 40 ± 3 in lb 62 ± 4 in lb 62 ± 4 in lb 105 ± 5 in lb
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