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Steel Adapter, 7/16-20 Male SAE O-Ring Boss (Straight Thread O-Ring) To 1/8-27 Male NPT, Straight

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Description & Features

This high-quality fitting from Brennan Industries Inc meets the demanding requirements of various industrial applications. Engineered to connect 7/16-20 Male SAE O-Ring Boss (Straight Thread O-Ring) to 1/8-27 Male NPT threads it ensures a reliable seal and robust performance.

Constructed from durable steel this adapter guarantees longevity and resistance to wear. The precision-machined threads offer a secure and tight fit minimizing the risk of leaks and enhancing system reliability.

Ideal for use in hydraulic systems this adapter supports a range of tasks requiring the conversion of thread types. Its straightforward design promotes ease of installation reducing maintenance time and operational disruptions.

Compatible with various equipment the Steel Adapter provides a versatile solution for industrial requirements.

Supplier Part Number: 6401-04-02-O

Specifications

Connection Size 1
1/4 in
Connection Size 2
1/8 in
Connection Type
Male SAE ORB, MNPT
Connection Type 1
Male SAE ORB
Connection Type 2
MNPTF
Dimension Standards
SAE J1926/J476
Dimensions
1.07 in L
Finish
Trivalent Zinc-Plated
Fitting Type
Adapter
Hex Size
0.563 in
Material
Steel
Material Construction
AISI 12L14/C1045 Steel
Maximum Operating Pressure
6000 psi
Operating Temperature
-40 to 250 deg F
Series
6401-O Series
Thread Sealant
Without Thread Sealant
Thread Size
1/8-27, 7/16-20

Product Questions & Answers (2)

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Question by: Marvin E on Jun 10, 2025, 6:03 PM
Got a port on a small hydraulic manifold that's tapped 1/8 NPT and I need to hook into a -4 ORB line. this the right adapter for that?
Answer by: Customer Support on Jun 12, 2025, 6:47 AM
that setup is exactly what this piece is built for. One end is a 7/16-20 male SAE O-Ring Boss, which is your standard -4 ORB size, and the other end is a 1/8-27 male NPT. So if your manifold port is female 1/8 NPT and your line fitting is female -4 ORB, this adapter bridges those two thread types straight through with no offset or angle.
Question by: Lynn H on Aug 13, 2025, 3:39 PM
Will this fitting work to connect a 7/16-20 male SAE O-ring to a 1/8-27 male NPT?
Answer by: Customer Support on Aug 15, 2025, 2:52 PM
Yes, that's exactly what this steel adapter is designed for, connecting those two thread types securely.

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