D Torque Table - IBM 6400 Maintenance Information Manual

D
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 represents "No. 2 Screw, 56 Threads Per Inch.)
Carbon Steel Fasteners (ANSI B18.6.3 - 1972)
Into Alum. or
Fastener
Size
2-56 25 ± 2 in oz
4-40 62 ± 4 in oz
6-32 122 ± 7 in oz
8-32 11 ± in lb
10-24 20 ± 1 in lb
10-32 15 ± 1 in lb
1/4 - 20 40 ± 3 in lb
Fastener Sizes
4-40 UNC & 4-48 UNF
6-32 UNC & 6-40 UNF
8-32 UNC & 8-36 UNF
10-24 UNC & 10-32 UNF
Into Steel
Brass
60,000 psi
25,000 psi
ultimate
ultimate
tensile
tensile
strength
strength
36 ± 2 in oz
75 ± 5 in oz
150 ± 10 in oz
18 ± 1 in lb
25 ± 1.5 in lb
29 ± 2 in lb
62 ± 4 in lb
Torque for Routine Tightening of Threaded
4 ± 1 in lb
11 ± 1 in lb
19 ± 1 in lb
25 ± 1 in lb
Into
Medium
Carbon
Into Weld/ Steel
Press Studs Fasteners
or Nuts 100,000 psi
ultimate
tensile
strength
30 ± 2 in oz *
70 ± 5 in oz *
135 ± 10 in oz *
18 ± 1 in lb *
21 ± 1 in lb *
29 ± 1 in lb *
62 ± 4 in lb 105 ± 5 in lb
Fasteners
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