nifty SP45 - Torque Specifications

SP Series
Operating & Safety Instructions
USA – 11/14
Original instructions
18
3.5 TORQUE REQUIREMENTS
BOLT QUALITY/SIZE
Tightening torque in lbs ft (Nm)
Plated
Unplated
Grade
8.8
10.9
12.9
8.8
10.9
12.9
M 6
5 (7)
8 (10)
9 (12)
6 (8)
8 (11)
10 (13)
M 8
13 (17)
18 (25)
22 (29)
14 (19)
20 (27)
23 (32)
M 10
25 (34)
36 (49)
43 (58)
27 (37)
40 (54)
46 (63)
M 12
43 (58)
63 (85)
73 (99)
47 (63)
69 (93)
80 (108)
M 14
68 (93)
100 (135)
117 (158)
74 (101)
109 (148)
127 (172)
M 16
106 (143)
154 (209)
180 (245)
115 (156)
168 (228)
197 (267)
M 20
212 (288)
301 (408)
352 (477)
224 (304)
328 (445)
384 (521)
M24
362 (491)
515 (698)
602 (806)
383 (519)
561 (760)
656 (889)
WHEEL NUTS
110ft lbs (150 Nm)
WHEEL GEARBOX NUTS
99ft lbs (135 Nm)
ROTATION RING BOLTS
205ft lbs (279 Nm)
This torque chart is based on the following assumptions:
1) Bolts to ISO 898-1 "Mechanical properties of fasteners made of carbon steel and alloy steel"
2) For "unplated" bolts, all grades:
Hex head bolts
Black oxide steel bolt with a rolled & oiled thread, no finish on steel nut
Prevailing torque includes Nylock (minimum prevailing torque figure assumed)
Medium Clearance holes to ISO 273
Bolt tightening condition = Yield factor of 75%
3) For "plated" bolts, all grades:
Hex head bolts
Zinc plated oiled (rolled or cut) steel external thread with no finish on steel internal thread
Prevailing torque includes Nylock (minimum prevailing torque figure assumed)
Medium Clearance holes to ISO 273
Bolt tightening condition = Yield factor of 75%
Figures quoted in Nm have been calculated in Nm and then rounded to the nearest whole number.
Figures quoted in lb-ft have been calculated in Nm, converted using a factor of 0.737561 and then
rounded.