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Steel Adapter, 9/16-18 Female O-Ring Face Seal To 7/16-20 Male JIC 37 deg Flare, Straight

Alternate Part Numbers Alternate Part Number AFF2209T0404S, Alternate Part Number C1EW83, Alternate Part Number FF6504-04-04, Alternate Part Number MI-00264883, Alternate Part Number MINO-00028F00377	Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	L 1.50	Supplier Part Number FS6504-04-04	Thread 1 9/16-18	Thread 2 7/16-20	Thread Sealant No	Tube O.D. 0.25	Tube O.D. 0.25	Product Weight 0.10 lbs

Product Questions & Answers 2

Product Questions & Answers

trying to hook up a #4 ORFS hose end to a #4 JIC line, is this the straight adapter for that?

Question by: Scott B on Jan 14, 2026, 6:21 PM

For connecting those two styles, it matches a 9/16-18 female O-ring face seal on one side to a 7/16-20 male JIC 37 degree flare on the other, in a straight body. It is commonly labeled as #4 FORS x #4 MJ.

Answer by: Customer Support on Jan 16, 2026, 8:23 AM

So this here adapter, it's gonna let me hook up a O-ring face seal to a JIC flare, right? Just want to make sure I'm understandin' it right.

Question by: Dustin S on Oct 12, 2025, 12:43 PM

That's correct. This adapter facilitates a connection between a 9/16-18 Female O-Ring Face Seal and a 7/16-20 Male JIC 37-degree flare.

Answer by: Customer Support on Oct 14, 2025, 11:22 AM

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Model Number	Tube O.D.	Thread 1	Thread 2	L
FS6504-04-04	0.25	9/16-18	7/16-20	1.5
FS6504-06-06	0.38	11/16-16	9/16-18	1.76
FS6504-08-08	0.5	13/16-16	3/4-16	1.9
FS6504-10-10	0.63	1-14	7/8-14	2.3
FS6504-12-12	0.75	1-3/16-12	1-1/16-12
FS6504-16-16	1	1-7/16-12	1-5/16-12	2.7