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Steel Adapter, 9/16-18 Male SAE O-Ring Boss (Straight Thread O-Ring) To 1/8-27 Male NPT, Straight

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Description & Features

The Steel Adapter 9/16-18 Male SAE O-Ring Boss (Straight Thread O-Ring) To 1/8-27 Male NPT Straight designed by Brennan Industries Inc. ensures optimal connection adaptability for industrial applications. Crafted for seamless integration this adapter enables the conversion between #6 MORB and #2 MP thread types.

Engineered to uphold stringent industry standards it features robust steel construction providing durability and reliability under varied conditions. The precision threading 9/16-18 for the SAE O-Ring Boss and 1/8-27 for the NPT guarantees a secure fit minimizing leakage risks.

Notably this adapter employs a straight thread O-Ring ensuring airtight seals without additional thread sealant. This enhances the overall efficiency of the mechanical systems it supports.

Particularly useful in settings demanding high-pressure and performance reliability this product excels in facilitating compatibility and functionality within complex industrial setups.

MPN: C1EK73

Supplier Part Number: 6401-06-02-O

Specifications

Connection Size 1
3/8 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
1.13 in L
Finish
Trivalent Zinc-Plated
Fitting Type
Adapter
Hex Size
11/16 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
9/16-18 x 1/8-27

Product Questions & Answers (1)

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Question by: Jerry P on Mar 2, 2026, 7:57 PM
got a port on a small hydraulic manifold that's 1/8 NPT and I need to tie into a #6 ORB line, this the right piece for that?
Answer by: Customer Support on Mar 4, 2026, 7:52 AM
That's exactly the conversion this adapter handles. One end is 9/16-18 male SAE O-Ring Boss, which is your #6 ORB, and the other end is 1/8-27 male NPT. Steel construction, straight configuration, so if your manifold has a female 1/8 NPT port and your line terminates in a female #6 ORB fitting, you'd be set.

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