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Brass Adapter, 3/8-18 Male NPT To 1/4-18 Female NPT, Bushing

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Description & Features

Designed to facilitate secure connections in grease refrigeration instrumentation and hydraulic systems this adapter is an essential component for industry-specific applications.

Engineered by Danfoss Power Solutions (Aeroquip Inc-Alternate) it features a 3/8-18 male NPTF thread on one end and a 1/4-18 female NPTF thread on the other ensuring compatibility with a variety of system requirements.

Made of robust brass it provides reliable performance even in extreme temperatures withstanding conditions as low as -65 degrees Fahrenheit. This bushing adapter is categorized under UNSPSC 40183100 and holds a segment code of seg_code_a.

Applications include special order fuel LP and natural gas systems. The absence of thread sealant makes it adaptable to diverse environmental conditions and operational needs.

Its catalog number C1HN99 is widely recognized in industrial supply chains.

ECCN: EAR99

Supplier Part Number: 3220X6X4

Specifications

Brand
Aeroquip® by Danfoss
Connection Size 1
3/8 in
Connection Size 2
1/4 in
Connection Type
FNPT, MNPT
Connection Type 1
Male NPTF
Connection Type 2
Female NPTF
Dimension Standards
SAE 130140
Dimensions
0.69 in L
Fitting Type
Bushing
For Use With
Brass, Bronze and Iron Pipes
Hex Size
11/16 in
Material
Brass
Material Construction
Brass
Series
3220X Series
Thread Size
3/8-18 x 1/4-18

Product Questions & Answers (1)

Question by: Shawn R on Feb 19, 2026, 3:40 PM
trying to step a 3/8 pipe port down to 1/4, is that what this bushing does
Answer by: Customer Support on Feb 21, 2026, 3:29 PM
For stepping down pipe thread sizes, it’s a 3/8-18 male NPTF on one end and a 1/4-18 female NPTF on the other, so it lets you adapt a 3/8 female NPTF port over to accept a 1/4 male NPTF fitting.

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