High Pressure Face Seal Torque Chart

N55267-UN-05OCT00

Stud Straight and Tube Nut

N55209-UN-02OCT00

Bulkhead Union and Bulkhead Locknut

N55268-UN-05OCT00

Swivel Elbow and Tube Nut

N55269-UN-05OCT00

Adjustable Stud Elbow

NOTE: Do not allow hoses to twist when tightening fittings.

Assembly torques are for face seal tube hose connections and for J1926 in. O-Ring stud ends for high pressure applications above 27.6 MPA (4,000 psi). Working pressure is 41.3 MPA (6,000 psi).

Nominal Tube O.D./Hose I.D.				Face Seal Tube/Hose End					O-Ring Stud Ends
Metric Tube O.D.	Inch Tube O.D.			Thread Size	Tube Nut/Swivel Nut Torque		Bulkhead Locknut Torque		Thread Size	Straight Fitting or Locknut Torque
mm	Dash Size	(in.)	mm	(in.)	N·m	(lb-ft)	N·m	(lb-ft)	(in.)	N·m	(lb-ft)
5	-3	0.188	3.76	—	—	—	—	—	3/8-24
6	-4	0.250	6.35	9/16-18	24	18	12	9	7/16-20	21	15
8	-5	0.312	7.94	—	—	—	—	—	1/2-20
10	-6	0.375	9.52	11/16-16	37	27	24	18	9/16-18	34	25
12	-8	0.500	12.70	13/16-16	50	37	46	34	3/4-16	73	55
16	-10	0.625	15.88	1-14	69	51	62	46	7/8-14	104	76
20	-12	0.750	19.05	1-3/16-12	102	75	102	75	1-1/6-12	176	130
22	-14	0.875	22.22	1-3/16-12	102	75	102	75	1-3/16-12	230	170
25	-16	1.000	25.40	1-7/16-12	142	105	142	105	1-5/16-12	285	210

NOTE: Torque tolerance is +15% or -20 % unless otherwise specified.