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20FORB-20MP STRAIGHT

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Description & Features

The BRENNAN INDUSTRIES INC 20FORB-20MP STRAIGHT fitting stands out with its precision engineering and robust construction for demanding industrial applications. Featuring an overall length of 2.340 mm this adapter is constructed from high-quality straight steel offering durability and reliability in various operational environments.

The 6404 series adapter is designed with a Female SAE O-ring Boss thread of size 1-5/8-12 per SAE J514 and a Male NPTF thread of size 1-1/4-11-1/2 per SAE J476 ensuring compatibility with standard industrial connections. The 1.078 mm and 1.250 mm drill sizes for threads B1 and B2 respectively ensure a precise fit and secure connection.

Ideal for applications requiring secure leak-free connections the 20FORB-20MP STRAIGHT serves as a critical component in maintaining system integrity and performance. This adapter complies with stringent industrial standards making it reliable for consistent performance in various mechanical and hydraulic systems.

MPN: 6404-20-20

Supplier Part Number: 6404-20-20

Specifications

Connection Size 1
1-1/4 in
Connection Size 2
1-1/4 in
Connection Type
Female SAE ORB, MNPT
Connection Type 1
Female SAE ORB
Connection Type 2
MNPTF
Dimension Standards
SAE J1926, SAE J476, SAE J514
Dimensions
2.19 in L
Finish
Trivalent Zinc-Plated
Fitting Type
Adapter
Hex Size
2-1/8 in
l Dimensions
2.34 in
Material
Steel
Material Construction
12L14/C1045 Steel
Maximum Operating Pressure
3000 psi
Series
6404 Series
Thread 2 Drill Dimensions
1.25 in
Thread B1 Drill Dimensions
1.078 in
Thread Size
1-1/4-11-1/2, 1-5/8-12

Product Questions & Answers (3)

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Question by: Travis W on Jan 6, 2026, 7:01 AM
So this is steel, right? Is it gonna hold up if it gets kinda wet sometimes?
Answer by: Customer Support on Jan 7, 2026, 6:13 PM
This STRAIGHT fitting is made from steel, offering good durability for industrial use.
Question by: Wade M on Feb 1, 2026, 1:44 PM
What kind of thread setup does this adapter have on each end, and will it work going from an O-ring boss port to an NPTF line?
Answer by: Customer Support on Feb 2, 2026, 5:01 PM
One end is a 1-5/8-12 female SAE O-ring boss, built to SAE J514. The other end is a 1-1/4-11-1/2 male NPTF, built to SAE J476. So yeah, it bridges those two thread types in a straight configuration, which is exactly what you'd need when connecting an ORB port to a tapered pipe thread fitting or line.
Question by: Clint R on Dec 24, 2025, 7:12 AM
got a hose end with a 1-5/8-12 female SAE o-ring boss, will this screw into it and then give me a 1-1/4 NPTF male on the other side?
Answer by: Customer Support on Dec 25, 2025, 6:58 PM
It’s a straight adapter with a 1-5/8-12 Female SAE O-ring Boss thread on one end (SAE J514) and a 1-1/4-11-1/2 Male NPTF thread on the other (SAE J476), so it matches that thread pairing.

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