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06MORB-06FORB STRAIGHT REDUCER

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Description & Features

This straight reducer features a male SAE O-ring boss (MORB) on one end and a female SAE O-ring boss (FORB) on the other. Constructed from steel, this 06MORB-06FORB STRAIGHT REDUCER is part of the 6410-O series.

It is manufactured with NBR O-ring seal material. The thread size for both the B1 and B2 ports is 9/16-18, conforming to SAE J514 specifications. Each thread has a drill size of 0.297 mm.

SKU: 6410-06-06-O

Supplier Part Number (MPN): 6410-06-06-O

Alternate Part Numbers: 6410-06-06, AFF1010-0606S

Specifications

Brand
BRENNAN
Connection Size 1
3/8 in
Connection Size 2
3/8 in
Connection Type
Female SAE ORB, Male SAE ORB
Connection Type 1
Male SAE ORB
Connection Type 2
Female SAE ORB
Dimension Standards
SAE J1926, SAE J514
Dimensions
1.29 in L
Finish
Trivalent Zinc-Plated
Fitting Type
Reducer
Hex Size
7/8 in
Material
Steel
Material Construction
12L14/C1045 Steel
Maximum Operating Pressure
6000 psi
Operating Temperature
-40 to 250 deg F
Seal Material
NBR
Series
6410-O Series
Thread 2 Drill Dimensions
0.297 in
Thread B1 Drill Dimensions
0.297 in
Thread Size
9/16-18

Product Questions & Answers (3)

Question by: Stan T on Mar 27, 2026, 3:16 PM
trying to match up a reducer i pulled off a machine. is this one male SAE o-ring boss to female SAE o-ring boss?
Answer by: Customer Support on Mar 28, 2026, 8:57 PM
Function-wise, it is a straight reducer with a male SAE O-ring boss (MORB) on one end and a female SAE O-ring boss (FORB) on the other. It uses an NBR O-ring seal and is built from steel in the Brennan 6410-O series.
Question by: Rick B on Nov 10, 2025, 8:42 AM
both ends on this fitting are 9/16-18 threads -- so what's the point of calling it a reducer if the sizes match up?
Answer by: Customer Support on Nov 12, 2025, 6:08 AM
Fair question. The "reducer" label here refers to the port configuration, not necessarily a change in thread diameter. One end is a male SAE O-ring boss and the other is female SAE O-ring boss, both at 9/16-18. That male-to-female arrangement lets you extend or adapt a port connection inline without changing thread size, which is exactly what you need when you're working with a fixed-size port and just need to change the gender of the connection to make everything line up right.
Question by: Melvin H on Oct 17, 2025, 8:48 AM
Hey, will this here reducer work with a regular SAE fitting, or does it have to be one of them O-ring kind?
Answer by: Customer Support on Oct 18, 2025, 3:16 PM
This straight reducer is designed to connect to SAE O-ring boss (ORB) ports. One end is male (MORB), and the other is female (FORB). Both ports need to be SAE O-ring boss type for a proper seal.

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