User guide

Rockwell Automation Publication MP-UM001D-EN-P - September 2013 105
Mounting Bolts and Torque Values Appendix F
Table 20 - Recommended Seating Torque for Brass Rb 72
Bolt Size
(1), (2)
UNC UNF
Plain Cadmium Plated Plain Cadmium Plated
N•m (lb•in.) N•m (lb•in.) N•m (lb•in.) N•m (lb•in.)
#0 — — 0.24 (2.1)
(3)
0.18 (1.6)
(3)
#1 0.43(3.8)
(3)
0.33 (2.9)
(3)
0.46 (4.1) 0.34 (3.0)
(3)
#2 0.71 (6.3)
(3)
0.53 (4.7)
(3)
0.77 (6.8)
(3)
0.58 (5.1)
(3)
#3 1.08 (9.6)
(3)
0.81 (7.2)
(3)
1.16 (10.3)
(3)
0.87 (7.7)
(3)
#4 1.52 (13.5)
(3)
1.1 (10)
(3)
1.67 (14.8)
(3)
1.24 (11)
(3)
#5 2.2 (20)
(3)
1.7 (15)
(3)
2.4 (21)
(3)
1.8 (16)
(3)
#6 2.8 (25)
(3)
2.1 (19)
(3)
3.2 (28)
(3)
2.4 (21)
(3)
#8 5.2 (46)
(3)
3.8 (34) 5.4 (48)
(3)
4.1 (36)
(3)
#10 7.6 (67)
(3)
5.6 (50)
(3)
8.6 (76)
(3)
6.4 (57)
(3)
1/4 15.3 (136) 11.5 (102) 15.4 (136) 11.5 (102)
5/16 25.8 (228) 19.3 (171) 25.8 (228) 19.3 (171)
3/8 53.7 (476) 40.3 (357) 53.7 (476) 40.3 (357)
7/16 76.8 (680) 57.6 (510) 76.8 (680) 57.6 (510)
(1) Mounting hardware is 1960-series socket head cap bolt that meets or exceeds ANSI B18.3.
(2) Torque is based on 60,000 psi bearing stress under the head of the bolt.
(3) Denotes torques based on 100,000 psi tensile stress with both threads up to one inch in diameter.