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Brass Adapter, 1/4-18 Female NPT To 1/8-27 Female NPT, Straight

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Description & Features

Designed for reliability the Brass Adapter 1/4-18 Female NPT To 1/8-27 Female NPT Straight is an essential component in various industrial contexts including grease refrigeration instrumentation and hydraulic systems. Fuel LP and natural gas applications can be accommodated through special orders.

Manufactured by Danfoss Power Solutions (Aeroquip Inc-Alternate) this adapter ensures durable and efficient connections between two NPTF threaded components. With a minimum working temperature as low as -65F it is well-suited for demanding environments.

Featuring female threading on both ends this adapter allows seamless integration into existing setups without the need for additional sealants. The 1/4-18 thread on one side and 1/8-27 thread on the other offers versatility and adaptability for diverse equipment configurations.

ECCN: EAR99

Supplier Part Number: 3300X4X2

Specifications

Connection Size 1
1/4 in
Connection Size 2
1/8 in
Connection Type
FNPT
Connection Type 1
Female NPTF
Connection Type 2
Female NPTF
Dimension Standards
SAE 130138
Dimensions
0.96 in L
Finish
Nickel-Plated
Fitting Type
Coupling
For Use With
Brass, Bronze and Iron Pipes
Hex Size
3/4 in
Material
Brass
Material Construction
Brass
Series
3300X Series
Thread Size
1/4-18 x 1/8-27

Product Questions & Answers (1)

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Question by: Phil B on Jul 9, 2025, 5:24 PM
got a gauge port on a old grease manifold thats 1/4 NPT female and the fitting i need to hook to it is 1/8 NPT male, will this adapter get me there or do i need something different
Answer by: Customer Support on Jul 11, 2025, 6:58 AM
Female on both ends is the key detail here. This adapter has a 1/4-18 female port on one side and a 1/8-27 female port on the other, so it's built to connect two male-threaded components together, not a female port directly to a male fitting. If your manifold port is female and your incoming fitting is male, you'd be threading that male fitting into one end of this adapter, which works fine as long as the thread sizes line up with those two sizes.

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