Printronix P9012, Maintenance Manual

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D–1 Torque Table
D
Torque Table
IMPORTANT
Torque values specified in replacement procedures (Chapter 6) take
precedence over Table D–1.
Table D–1 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.
Fastener sizes are listed as Numbered Size – Threads Per Inch.
Table D–1. Torque Table
Fastener
Size
Into Alum.
or Brass
25 000 psi
ultimate
tensile
strength Into
Weld/Press
Studs or
Nuts Into Medium
Carbon Steel
Fasteners
105,000 psi
ultimate tensile
strength Into Steel
60 000 psi
ultimate
tensile
strength
Carbon Steel Fasteners
(ANSI B18.6.3 – 1972)
2–56
4–40
6–32
8–32
10–24
10–32
1/4 – 20
25
±
2 in oz
62
±
4 in oz
122
±
7 in oz
11
±
1 in lb
20
±
1 in lb
15
±
1 in lb
40
±
3 in lb
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
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
––
––
––
––
Fastener Size
Torque for Routine Tightening of Threaded
Fasteners
4–40 UNC & 4–48 UNF
4
±
1 in lb
6–32 UNC & 6–40 UNF 11
±
1 in lb
8–32 UNC & 8–36 UNF 19
±
1 in lb
10–24 UNC & 10–32 UNF 25
±
1 in lb