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ADAPTER

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Description & Features

This straight steel adapter features a male SAE O-ring Boss thread (1-5/8-12, SAE J514) on one end and a male NPTF thread (1-11-1/2, SAE J476) on the other. The adapter's overall length is 2.150 mm, and it is part of the 6401-O series.

This adapter is suitable for a variety of applications requiring a reliable connection between SAE O-ring Boss and NPTF threaded components. The NBR O-ring seal ensures a tight, leak-free connection.

SKU: 6401-20-16-O

Supplier Part Number (MPN): 6401-20-16-O

Specifications

Connection Size 1
1-1/4 in
Connection Size 2
1 in
Connection Type
Male SAE ORB, MNPT
Connection Type 1
Male SAE ORB
Connection Type 2
MNPTF
Dimension Standards
SAE J1926, SAE J476, SAE J514
Dimensions
2.16 in L
Finish
Trivalent Zinc-Plated
Fitting Type
Adapter
Hex Size
1-7/8 in
Material
Steel
Material Construction
12L14/C1045 Steel
Maximum Operating Pressure
3000 psi
Operating Temperature
-40 to 250 deg F
Seal Material
NBR
Series
6401-O Series
Thread 2 Drill Dimensions
0.938 in
Thread B1 Drill Dimensions
1.078 in
Thread Size
1-5/8-12 x 1-11-1/2

Product Questions & Answers (1)

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Question by: Bobby P on Sep 23, 2025, 1:53 PM
Will this adapter work with both SAE and NPT threads?
Answer by: Customer Support on Sep 25, 2025, 6:52 AM
This adapter is designed to connect SAE O-ring Boss (SAE J514) to NPTF (SAE J476) threaded components, so it will work with both.

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