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STR. REDUCER

Description & Features

Designed for reducing thread size in hydraulic line connections, this straight steel reducer from Brennan Industries transitions from a 1/2-20 Female SAE O-Ring Boss port to a 7/16-20 Male SAE O-Ring Boss end. Both threads conform to SAE J514, making this fitting appropriate for use in hydraulic systems requiring standardized, leak-resistant O-ring face seal connections.

The STR. Reducer is constructed from straight steel with an NBR O-ring seal, suited for compatibility with petroleum-based hydraulic fluids. Its straight configuration keeps the connection inline, and the overall length of 1.160 inches supports compact installation where space is limited. The Brennan 6410-O series is a recognized product line for SAE O-Ring Boss hydraulic fittings used across mobile and industrial hydraulic circuits.

California Residents: This product is subject to Prop 65 warnings.

SKU: 6410-04-05-O

Supplier Part Number (MPN): 6410-04-05-O

Specifications

Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number 6410-04-05-O	Product Weight 0.08 lbs

Product Questions & Answers (1)

Question by: Wes E on Nov 9, 2025, 5:51 PM

reckon this will work alright with regular hydraulic fluid, like what i use on my backhoe?

Answer by: Customer Support on Nov 11, 2025, 1:05 PM

This straight reducer is constructed from straight steel with an NBR O-ring seal, which makes it compatible with petroleum-based hydraulic fluids.