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Stainless Steel Adapter, 3/8-18 Male NPT To 1/8-27 Female NPT, Bushing

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Description & Features

Manufactured in stainless steel, this pipe-to-pipe bushing connects a 3/8-18 male NPT thread to a 1/8-27 female NPT thread, allowing two different NPT-threaded ports or lines to be joined where a size reduction is required. The Stainless Steel Adapter, 3/8-18 Male NPT To 1/8-27 Female NPT, Bushing has an overall length of 0.85 inches and is suited for hydraulic and industrial fluid systems where corrosion resistance is a priority.

Supplied by SSP Fittings Corp, this bushing is a straightforward solution for reducing or adapting NPT connections in stainless steel wherever the application demands durability and resistance to harsh media or environments.

SKU: PTR-3/8X1/8

Supplier Part Number (MPN): 3/8X1/8PTR

Alternate Part Numbers: C1DJ25

Specifications

Brand
SSP
Connection Size 1
3/8 in
Connection Size 2
1/8 in
Connection Type
FNPT, MNPT
Connection Type 1
Male NPT
Connection Type 2
Female NPT
Dimension Standards
ANSI/ASME B1.20.1, ANSI/ASME BS 21, SAE J514, JIS B0203
Dimensions
0.85 in L
Fitting Type
Bushing
For Use With
Industrial Pipes
Hex Size
3/4 in
Material
Stainless Steel
Material Construction
316 Stainless Steel
Maximum Operating Pressure
6550 psig
Series
PTR Series
Thread Sealant
Without Thread Sealant
Thread Size
3/8-18, 1/8-27

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Product Questions & Answers (1)

Question by: Keith T on Nov 21, 2025, 8:16 AM
got a 3/8-18 npt port but my gauge line is 1/8-27 npt. is this the right little bushing to step it down
Answer by: Customer Support on Nov 22, 2025, 2:01 PM
For stepping a 3/8-18 male NPT connection down to a 1/8-27 female NPT connection, this bushing is the correct thread match. It is a pipe-to-pipe adapter meant to join two different NPT sizes when you need a reduction.

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