IBM 6400-I15 Maintenance Manual - Page 347
Appendix D Torque Table, Torque Table
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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. Fastener sizes are listed as Numbered Size - Threads Per Inch. Torque Table 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 105,000 psi ultimate tensile strength 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 4-40 UNC & 4-48 UNF 6-32 UNC & 6-40 UNF 8-32 UNC & 8-36 UNF 10-24 UNC & 10-32 UNF Torque for Routine Tightening of Threaded Fasteners 4 + 1 in lb 11 + 1 in lb 19 + 1 in lb 25 + 1 in lb Torque Table 347
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