Steel Adapter, 3/4-14 Male NPT To 3/4-16 Male JIC 37 deg Flare, Straight

Description & Features

This Danfoss / Eaton 2021 Series straight adapter facilitates connections between pipe and 37° flare systems. Designed for use in demanding applications, this steel adapter is suitable for marine/military, chemical processing, pulp and paper, food and beverage, and off-shore drilling environments.

The adapter features a 3/4-14 male NPT to 3/4-16 male JIC 37 deg flare, ensuring secure and leak-free connections. It is built to withstand a minimum working temperature of -40 degrees. The end connections are both male, with a 0.75 inch size for both ends. The first end is NPTF type with 3/4-14 threads, and the second end is SAE 37 type with 3/4-16 threads. The hex size 2 measures 1.12 inches, with tube I.D.s of 0.39 and 0.72 inches, respectively, and a tube O.D. of 0.5 inches.

SKU: 2021-12-8S

Supplier Part Number (MPN): 2021-12-8S

Alternate Part Numbers: 20011355, C1AU81, MI-00310209, MINO-00015F60072

Specifications

Connection Size 1
1/2 in
Connection Size 2
3/4 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
1.85 in L
Finish
Dura-Kote™
Fitting Type
Adapter
Hex Size
1-1/8 in
Material
Steel
Material Construction
Carbon Steel
Operating Temperature
-40
Series
2021 Series
Thread Size
3/4-16 x 3/4-14
Tube OD
1/2 in

Product Questions & Answers (2)

Sign In Hover me Please sign in to submit a question
Question by: Carl C on Feb 16, 2026, 6:48 AM
got a hose end that’s 3/4-16 JIC, what’s the other side of this adapter supposed to screw into
Answer by: Customer Support on Feb 18, 2026, 6:44 AM
On the other end you have a 3/4-14 male NPTF pipe thread. So it is a straight male NPTF to male SAE 37 degree flare (JIC) adapter, with both ends in 3/4 size.
Question by: Stan S on Dec 7, 2025, 7:37 PM
got a hose end that’s 3/4-16 JIC, and the port on my manifold is 3/4-14 NPT. is this the straight adapter to tie those together?
Answer by: Customer Support on Dec 9, 2025, 6:33 PM
Function-wise, that’s exactly what it’s for. It’s a straight steel adapter with a 3/4-14 male NPT on one end and a 3/4-16 male JIC 37 degree flare on the other.

Tell us what you need and we'll get back to you.

Fields marked * are required.