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Steel Adapter, 3/4-14 Male NPT To 1-1/16-12 Male JIC 37 deg Flare, Straight Bulkhead

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Description & Features

Designed for straight bulkhead installations, this Steel Adapter, 3/4-14 Male NPT To 1-1/16-12 Male JIC 37 Deg Flare, Straight Bulkhead from Eaton Aeroquip connects male NPT and male JIC 37° flare fittings in a single inline configuration. Part of the Eaton Aeroquip 2240 Series, it carries a catalog reference of C1BD18 and is built for hydraulic, instrumentation, and chemical processing systems where a secure, leak-resistant bulkhead connection is required.

Constructed from steel with a zinc-plated finish for corrosion resistance, the adapter has an overall length (A dimension) of 2.92 inches. The 37° flare seat provides a reliable metal-to-metal seal consistent with SAE JIC standards. Its straight bulkhead design allows panel or wall mounting, making it well suited for organized, compact routing in hydraulic circuits and fluid handling assemblies.

SKU: 2240-12-12S

Supplier Part Number (MPN): 2240-12-12S

Alternate Part Numbers: C1BD18, MI-00298916, MINO-00015F47347

Specifications

Connection Size 1
3/4 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 J514
Dimensions
2.92 in L
Finish
Dura-Kote™
Fitting Type
Adapter
Hex Size
1-3/8 in
Material
Steel
Material Construction
Carbon Steel
Operating Temperature
-65 to 400 deg F
Series
2240 Series
Thread Size
1-1/16-12 x 3/4-14

Product Questions & Answers (3)

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Question by: Lee E on Dec 5, 2025, 9:47 AM
What's the overall length of this fitting? Gotta make sure it fits in the space I have.
Answer by: Customer Support on Dec 6, 2025, 2:19 PM
Total length on this adapter is 2.92 inches.
Question by: Carl M on Jun 10, 2025, 9:28 PM
got a 3/4 NPT male port on a manifold and need to tie into a 1-1/16-12 JIC line running through a panel -- this a straight bulkhead that'd handle that?
Answer by: Customer Support on Jun 12, 2025, 8:43 AM
That's what this fitting is built for. One end is 3/4-14 male NPT and the other is 1-1/16-12 male JIC with a 37 degree flare, and the bulkhead configuration means it's meant to pass through a panel or bracket and get secured in place. Zinc plated steel construction, so it holds up well in standard hydraulic, instrumentation, and chemical processing setups. Solid choice for that kind of panel-mount transition.
Question by: Joyce H on Mar 22, 2026, 7:08 AM
i got a port that’s 3/4-14 npt on one side and i need to hook up a -12 jic line, is this the right straight bulkhead deal?
Answer by: Customer Support on Mar 24, 2026, 6:49 AM
For that combo, yes. This adapter is a straight bulkhead style with a 3/4-14 male NPTF external pipe thread on one end and a 1-1/16-12 male JIC 37 degree flare on the other, which is the common -12 JIC thread size.

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