Skip to the beginning of the images gallery

#4 FJ (SWIVEL) X #4 FJ (SWIVEL)

Description & Features

A straight union fitting connecting two Female JIC swivel ends, the #4 FJ (SWIVEL) X #4 FJ (SWIVEL) is built for hydraulic line assemblies requiring 37-degree flare connections at both ports. Both ends thread to 7/16-20 per SAE J514, with a drill dimension of 0.172 inches on each side.

Manufactured by Brennan Industries from straight steel, this fitting measures 1.330 inches in overall length, with a secondary length of 0.650 inches and a hex size of 0.563 inches across both ends. The swivel configuration on each end allows for rotational adjustment during installation, reducing stress on connected hose or tube assemblies. This part carries a California Prop 65 warning.

SKU: 6565-04-04

Supplier Part Number (MPN): 6565-04-04

Alternate Part Numbers: 6510-04-04

Specifications

Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number 6565-04-04	Product Weight 0.06 lbs

Product Questions & Answers (2)

Question by: Freddie F on Mar 30, 2026, 5:12 PM

trying to replace a straight union on a #4 JIC line. are both ends on this one female JIC swivel?

Answer by: Customer Support on Mar 31, 2026, 7:06 PM

Both sides are female JIC swivel ends with a 37 degree flare, sized #4 with 7/16-20 threads to SAE J514. It is a straight union, so it connects two matching male JIC flare ends and lets you rotate each swivel during install.

Question by: Peggy B on Apr 9, 2025, 8:57 AM

So, these both swivel, right? Just makin' sure 'fore I order.

Answer by: Customer Support on Apr 10, 2025, 9:04 PM

That's correct. The swivel configuration on each end allows for rotational adjustment during installation, which really helps reduce stress on your connected hose or tube assemblies.