Steel Adapter, 1/4-18 Male NPT To 3/4-16 Male JIC 37 deg Flare, Straight

Description & Features

This straight steel adapter is part of the Danfoss / Eaton 2021 series of pipe to 37° Flare steel adapters. Featuring a 1/4-18 Male NPT to 3/4-16 Male JIC 37 deg Flare connection, this adapter ensures secure and reliable connections in demanding environments.

Designed for use across diverse applications including marine and military, chemical processing, pulp and paper industries, food and beverage processing, and off-shore drilling. With a minimum working temperature of -40, this steel adapter is built to withstand extreme conditions. The thread sealant is 0. Thread 1 is 1/4-18 and Thread 2 is 3/4-16.

SKU: 2021-4-8S

Supplier Part Number (MPN): 2021-4-8S

Alternate Part Numbers: C1AV18, MI-00310181, MINO-00015F60070

Specifications

Connection Size 1
1/2 in
Connection Size 2
1/4 in
Connection Type
Male JIC, MNPT
Connection Type 1
Male SAE 37 deg JIC Flare
Connection Type 2
Male NPTF
Dimension Standards
SAE 070102/J514
Dimensions
1.53 in L
Finish
Dura-Kote™
Fitting Type
Adapter
Hex Size
0.81 in
Material
Steel
Material Construction
Carbon Steel
Operating Temperature
-40
Series
2021 Series
Thread Size
3/4-16, 1/4-18
Tube OD
1/2 in

Product Questions & Answers (1)

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Question by: Brett H on Mar 21, 2026, 8:43 PM
got a hose end that’s 3/4-16 JIC, and the port on my block is 1/4-18 NPT. is this the straight piece to tie those together?
Answer by: Customer Support on Mar 23, 2026, 6:16 AM
For hooking those two thread types together, this adapter is a straight steel fitting with a 1/4-18 male NPT on one end and a 3/4-16 male JIC 37 degree flare on the other.

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