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06MORB-04FP Straight

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Description & Features

Crafted from straight steel this connector from Brennan Industries Inc ensures durability and high performance. The O-ring and seal material is NBR contributing to its robust sealing capabilities. The overall length is precisely 1.090 mm.

The male SAE O-ring boss thread complies with SAE J514 standards and the female NPSM thread adheres to SAE J476 specifications providing compatibility and reliability. The thread sizes are 9/16-18 and 1/4-18 respectively ensuring a secure fit.

Given its precision construction and adherence to industry standards it is ideal for rigorous technical applications.

Supplier Part Number: 6405-06-04-O

Specifications

Connection Size 1
3/8 in
Connection Size 2
1/4 in
Connection Type
FNPT, Male SAE ORB
Connection Type 1
Male SAE ORB
Connection Type 2
FNPTF
Dimension Standards
SAE J1926, SAE J476, SAE J514
Dimensions
1.23 in L
Finish
Trivalent Zinc-Plated
Fitting Type
Adapter
Hex Size
3/4 in
l Dimensions
1.09 in
Material
Steel
Material Construction
12L14/C1045 Steel
Maximum Operating Pressure
6000 psi
Operating Temperature
-40 to 250 deg F
Seal Material
NBR
Series
6405-O Series
Thread 2 Drill Dimensions
0.281 in
Thread B1 Drill Dimensions
0.297 in
Thread Size
1/4-18 x 9/16-18

Product Questions & Answers (2)

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Question by: Wes S on Apr 2, 2026, 12:29 PM
trying to replace a fitting, is this one the straight adapter that goes from 9/16-18 male SAE o-ring boss over to 1/4-18 female NPSM?
Answer by: Customer Support on Apr 4, 2026, 6:01 AM
Match-up wise, it’s a straight steel connector with a 9/16-18 male SAE O-ring boss thread on one end (SAE J514) and a 1/4-18 female NPSM thread on the other (SAE J476). The seal is NBR, so it’s built around an O-ring boss style seal on the male side.
Question by: Terry P on Sep 29, 2025, 12:59 PM
thread on the female end is 1/4-18 NPSM -- does that mean it'll connect straight onto standard pipe fittings running that same size?
Answer by: Customer Support on Oct 1, 2025, 6:21 AM
NPSM is a straight mechanical thread, not a tapered pipe thread, so it won't seal the same way an NPT fitting does. The female end here is 1/4-18 per SAE J476, which pairs with other NPSM-spec fittings. If your existing pipe fitting is NPT, the threads will technically engage but won't seal properly. Make sure whatever you're connecting to is also NPSM before you commit to this one.

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