Stainless Steel Fastener Torque Chart

Clamp loads are based on 75 of the minimum proof loads for each grade and size.

Stainless steel fastener torque chart. Torque values for a2 70 or a4 70 metric stainless steel fasteners n lbs lbs nm 3 0 5 3522 792 2264 509 1698 382 0 81 7 2 in lbs 0 95 8 4 in lbs 906 204 4 0 7 6145 1381 3950 888 2963 666 1 90 2 21 1580 355 5 0 8 9928 2232 6382 1435 4787 1076 3 83 4 47 2553 574. 14 118 106 87 78 16 180 162 133 119 18 258 232 190 171 20 370 333 273 246 22 485 437 358 322 24. Fastener torque charts imperial has made a concerted effort to provide accurate information in its catalog and on its web site however imperial assumes no responsibility for the accuracy of the information. Torque tension relationship for a307a grade 5 8 9 bolts locknut size threads per inch steel hex locknut steel hex flange nut grade c fnl grade 9 grade f grade g clamp load lbs tightening torque clamp load lbs tightening torque clamp load lbs tightening torque clamp load lbs tightening torque min max min max min max min max.

4 2 6 2 3 23 0 20 7 5 5 1 4 6 45 1 40 6 6 8 7 7 8 77 0 69 3 8 21 2 19 1 188 169 10 42 38 372 335 12 73 66 54 ft lbs. 18 8 stainless steel 316 stainless steel suggested maximum torquing values a guide based upon actual lab testing on dry or near dry fasteners wiped clean. Recommended bolt torque values for stainless steel and nonferrous fasteners inch series. Proof load stress area yield strength and other data is based on ifi 7th edition 2003 technical data n 68 sae j429 astm a307 a325 a354 a449 and a490.

Yield strength psi grade identification marking min. Mechanical properties of common stainless steel fasteners in accordance with astm f593 stainless alloy group condition nominal dia. For longer fasteners the torque is reduced significantly. Torque chart for stainless steel cap screws size 316 i n c h 18 8 i n c h 10 1 9 6 6 40 12 7 12 1 8 32 20 7 19 8 8 36 23 0 22 0 10 24.

The following suggested tightening torques provide an excellent starting point for determining torque requirements. In tensile strength psi core hardness rockwell min. Ansi hardware design guide design torque and force calculations. Torque values for a2 or a4 metric stainless steel fasteners bolt dia mm dry lubricated 3 1 0 0 9 8 9 in lbs.

1 304 304l 305 384 18 9lw 302hq cw 1 4 5 8 100 000 150 000 b95 c32 65 000 3 4 1 1 2. Remember you may need to vary these numbers somewhat based on the individual joint or the amount of fastener lubrication. While fastenal has used reliable sources and testing to determine these values there are many variables that will effect the results and the use of this information is at sole risk of the. A1 50 a2 70 a4 80 a1 50 a2 70 a4 80 a1 50 a1 70.

Torque values stainless steel bolt table chart.