Service Recommendations For Flat Face O-Ring Seal Fittings

1. Inspect the fitting sealing surfaces and O-ring. They must be free of dirt or defects.

2. Lubricate O-rings and install into grove using petroleum jelly to hold in place.

3. Index angle fittings and tighten by hand pressing joint together to insure O-ring remains in place.

4. Tighten fitting or nut to torque value shown on the chart. Do not allow hoses to twist when tightening fittings, use backup wrench on straight hose couplings.

   IMPORTANT: Tighten fittings to 150% of listed torque value if indexing is necessary or if fitting is attached to an actuating devise.

   Tighten fittings to 50% of listed torque value if used in aluminum housing.

   FLAT FACE O-RING SEAL FITTING TORQUE*
   Nomial Tube O.D.		Thread Size	Swivel Nut		Bulkhead Nut
   mm	in.	in.	N˙m	lb-ft	N˙m	lb-ft
   6.35	0.250	9/16-18	16	12	12	9
   9.52	0.375	11/16-16	24	18	24	18
   12.70	0.500	13/16-16	50	37	46	34
   15.88	0.625	1-14	69	51	62	46
   19.05	0.750	1 3/16-12	102	75	102	75
   22.22	0.875	1 3/16-12	102	75	102	75
   25.40	1.000	1 7/16-12	142	105	142	105
   31.75	1.250	1 11/16-12	190	140	190	140
   38.10	1.500	2-12	217	160	217	160
   *Torque tolerance is +15 -20% unless otherwise specified.

   Stud End O-ring Seal Torque for Straight and Adjustable Fittings*
   Thread Size	Straight Hex Size	Locknut Hex Size	Straight Fitting or Locknut Toque
   Inch	Inch	Inch	N˙m	lb-ft
   3/8-24	5/8	9/16	12	9
   7/16-20	5/8	5/8	21	15
   1/2-20	3/4	11/16	26	19
   9/16-18	3/4	3/4	34	25
   3/4-16	7/8	15/16	73	55
   7/8-14	1 1/16	1 1/16	104	76
   1 1/16-12	1 1/4	1 3/8	176	130
   1 3/16-12	1 3/8	1 1/2	230	170
   1 5/16-12	1 1/2	1 5/8	285	210
   *Torque tolerance is +15 -20% unless otherwise specified.