SAE BOSS Torque Specifications

Adjustable Straight Thread

These Fittings include Elbows or Tees, which can be oriented toward a mating member, such as tubing, before tightening.

Unlike non-adjustable O-ring Boss connectors, the adjustable O-ring Boss connector utilizes a back-up washer which forces the O-ring into the cavity as the lock nut in tightened. Check out this torque specification guide for more info.

Thread Size	Assembly Torque (in-lb)	Assembly Torque (ft-lb)
2	85 – 95	7 – 8
3	160 – 180	13 – 15
4	205 – 235	17 – 19
5	245 – 275	21 – 23
6	300 – 340	25 – 29
8	545 – 595	46 – 50
10	1010 – 1100	85 – 95
12	1250 – 1350	105 – 115
14	1675 – 1825	139 – 151
16	1895 – 1945	154 – 166
20	2550 – 2850	213 – 237
24	2850 – 3150	238 – 262
32	3700 – 4100	310 – 340