Skip to the beginning of the images gallery

SS -5 MORB X -4 FNPT

Description & Features

Constructed from stainless steel, the SS -5 MORB X -4 FNPT is a straight hydraulic adapter designed for connecting a -5 Male SAE O-Ring Boss port to a -4 Female NPSM thread. The male end conforms to SAE J514 with a 1/2-20 thread, while the female end follows SAE J476 at 1/4-18, making thread compatibility straightforward to verify against system specifications.

An NBR O-ring seal is included, providing reliable sealing at the male O-ring boss connection. Stainless steel construction makes this fitting well-suited for applications where corrosion resistance is a priority. Manufactured by Brennan Industries under the 6405-O series, this straight adapter is a practical solution for transitioning between these two common thread forms in hydraulic assemblies.

SKU: 6405-05-04-O-SS

Supplier Part Number (MPN): 6405-05-04-O-SS

Alternate Part Numbers: 6405-05-04-SS

Specifications

Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number 6405-05-04-O-SS	Product Weight 0.13 lbs

Product Questions & Answers (1)

Question by: Freddie S on Dec 11, 2025, 9:01 AM

Will this fitting hold up if I'm using it outside where it might get rained on sometimes?

Answer by: Customer Support on Dec 12, 2025, 11:50 AM

Given its stainless steel construction, this adapter should offer good corrosion resistance in outdoor environments where it might be exposed to rain.