SAE Face Seal and O-ring Stud End Fitting Torque Chart—Standard Pressures

N79757-UN-13FEB08

A - Stud Straight and Tube Nut

B - Bulkhead Union and Bulkhead Lock Nut

C - 90° Swivel Elbow and Tube Nut

D - 90° Adjustable Stud Elbow

E - Port Plug

F - Stud End

G - Tube Nut

H - Swivel Nut

I - Lock Nut

SAE Face Seal and O-ring Stud End Fitting Torque Chart—Standard Pressure-Below 27.6 MPA (4,000 psi)
Nominal Tube OD Hose ID				O-ring Face Seal/ Tube Swivel Nut				Bulkhead Jam Nut Torque1			O-ring Straight, Adjustable, and External Port Plug Stud Ends1
Metric Tube OD	Inch Tube OD			Thread Size	Swivel Nut Hex Size	Tube Nut Swivel Nut Torque		Jam Nut Hex Size	Jam Nut Torque		Thread Size	Straight Hex Size2	Adj Lock Nut Hex Size	Steel or Gray Iron Torque		Aluminum or Brass Torque3
mm	Dash Size	in	mm	in	in	N·m	lb·ft	in	N·m	lb·ft	in	in	in	N·m	lb·ft	N·m	lb·ft
5	-3	0.188	4.78	—	—	—	—	—	—	—	3/8-24	5/8	9/16	12	9	8	6
6	-4	0.250	6.35	9/16-18	11/16	16	12	13/16	32	24	7/16-20	5/8	5/8	16	12	11	8
8	-5	0.312	7.92	—	—	—	—	—	—	—	1/2-20	3/4	11/16	24	18	16	12
10	-6	0.375	9.53	11/16-16	13/16	24	18	1	42	31	9/16-18	3/4	3/4	37	27	25	18
12	-8	0.500	12.70	13/16-16	15/16	50	37	1-1/8	93	69	3/4-16	7/8	15/16	50	37	33	25
16	-10	0.625	15.88	1-14	1-1/8	69	51	1-5/16	118	87	7/8-14	1-1/16	1-1/16	69	51	46	34
20	-12	0.750	19.05	1-3/16-12	1-3/8	102	75	1-1/2	175	129	1-1/16-12	1-1/4	1-3/8	102	75	68	50
22	-14	0.875	22.23	1-3/16-12	—	102	75	—	175	129	1-3/16-12	1-3/8	1-1/2	122	90	81	60
25	-16	1.000	25.40	1-7/16-12	1-5/8	142	105	1-3/4	247	182	1-5/16-12	1-1/2	1-5/8	142	105	95	70
32	-20	1.25	31.75	1-11/16-12	1-7/8	190	140	2	328	242	1-5/8-12	1-3/4	1-7/8	190	140	127	93
38	-24	1.50	38.10	2-12	2-1/4	217	160	2-3/8	374	276	1-7/8-12	2-1/8	2-1/8	217	160	145	107
50.8	-32	2.000	50.80	—	—	—	—	—	—	—	2-1/2-12	2-3/4	2-3/4	311	229	207	153