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a #4 orb to pipe female-female adaptor

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Description & Features

This straight steel adaptor features a #4 SAE O-ring Boss (ORB) female thread to a 1/4-18 female National Pipe Straight Mechanical (NPSM) thread.

The 6420 series adaptor provides a reliable connection between ORB and NPSM components in hydraulic systems, with the B1 thread featuring a 7/16-20 size conforming to SAE J514 specifications, and the B2 thread adhering to SAE J476 standards.

SKU: 6420-04-04

Supplier Part Number (MPN): 6420-04-04

Specifications

Connection Size 1
1/4 in
Connection Size 2
1/4 in
Connection Type
Female SAE ORB, FNPT
Connection Type 1
Female SAE ORB
Connection Type 2
FNPTF
Dimension Standards
SAE J1926, SAE J514, SAE J476
Dimensions
1.122 in L
Finish
Trivalent Zinc-Plated
Fitting Type
Adapter
Hex Size
3/4 in
Material
Steel
Material Construction
12L14/C1045 Steel
Maximum Operating Pressure
6000 psi
Operating Temperature
-40 to 250 deg F
Series
6420 Series
Thread 2 Drill Dimensions
0.281 in
Thread B1 Drill Dimensions
0.172 in
Thread Size
7/16-20, 1/4-18

Product Questions & Answers (1)

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Question by: Floyd P on Jun 23, 2025, 3:15 PM
Will this fitting hold up with regular hydraulic use, or is it more for lighter-duty stuff?
Answer by: Customer Support on Jun 25, 2025, 6:43 AM
Designed for hydraulic systems, this adaptor provides a reliable connection between ORB and NPSM components.

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