This steel adapter is expertly manufactured by Brennan Industries Inc. and designed for robust industrial applications. The 9/16-18 SAE O-Ring Boss ensures a tight and reliable seal while the 1/4-18 Male NPT connection offers compatibility with a variety of systems.
Engineered for consistent performance the adapter aligns with stringent industry standards. Its construction guarantees durability and precision making it an excellent choice for professional use.
The adapter features a straight-thread orientation providing straightforward integration into existing setups. Ideal for various demanding tasks it demonstrates reliability and longevity under challenging conditions.
MPN 6401-06-04-O
Supplier Part Number 6401-06-04-O
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Specifications
Alternate Part Numbers
Alternate Part Number6401-06-04, Alternate Part Number C1DY14, Alternate Part Number MI-00319283, Alternate Part Number MINO-00028F65391
Brand
Brennan Industries Inc
Brand
Brennan Industries
Pack Size
1.00
UOM
EA
L
1.29
Supplier Part Number
6401-06-04-O
Thread 1
9/16-18
Thread 2
1/4-18
Thread Sealant
No
Product Weight
0.00 lbs
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Product Questions & Answers (2)
Question by: Tammy H on Aug 15, 2025, 12:50 PM
Will this fitting work okay with standard NPT threads?
Answer by: Customer Support on Aug 17, 2025, 8:33 AM
This adapter has a 1/4-18 Male NPT end, so it's designed to connect to standard female NPT threads of the same size.
Question by: Duane H on Jan 2, 2026, 7:54 PM
Got a hydraulic line coming off a pump with a 1/4 NPT port and I need to step it up to an ORB fitting on the valve block. This the right piece for that?
Answer by: Customer Support on Jan 4, 2026, 6:54 AM
That's exactly the situation this adapter is built for. One end is a 9/16-18 Male SAE O-Ring Boss and the other is 1/4-18 Male NPT, so you'd be connecting a standard NPT port on one side to an ORB port on the other. Just make sure the valve block port is a female ORB and the pump port is female NPT and you're in good shape.
