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Straight Female 37° Flares

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Description & Features

Manufactured by Eaton Aeroquip, these carbon steel fittings are part of the E-Z Clip system designed for A/C refrigeration and hydraulic hose assemblies. Built to SAE 37° flare standards, they provide reliable connections in demanding industrial environments where consistent sealing performance matters.

The Straight Female 37° Flares feature a female end configuration with a 0.75-inch end size and a -8 hose dash size, making them well-suited for a wide range of hose and tube connection applications. The straight nipple assembly design supports efficient installation, helping reduce assembly time in production settings.

Carbon steel construction delivers durability across varied operating conditions. Compatible fluid types are documented in the Eaton fluid compatibility reference guide available for this product.

SKU: FJ3731-0808S

Supplier Part Number (MPN): FJ3731-0808S

Specifications

Brand
Danfoss
a Dimensions
4.35 in
Compatible Hose ID
1/2 in
Connection Size 1
1/2 in
Connection Size 2
1/2 in
Connection Type
Female JIC Swivel, Hose
Connection Type 1
Hose
Connection Type 2
Female 37 deg JIC Swivel
Construction Style
Reusable
Cut-Off Factor
2.81 in
Dimensions
4.35 in L x 0.88 in W x 1.01 in H
End Gender 1
Female
End Size 1
3/4 in
Finish
Zinc-Plated
Fitting Type
Hose Fitting
For Use With
E-Z Clip System A/C Refrigeration GH134 Series Hoses
Hex Size
0.87 in
Hose Dash Size
08
Inside Diameter
0.31 in
Material
Steel
Material Construction
Carbon Steel
nmfc
50
Seal Material
HNBR
Segment Code
C
Series
FJ3731 Series
Thread Sealant
Without Thread Sealant
Thread Size
3/4-16
Thread Type
UNF

Product Questions & Answers (3)

Question by: Cheryl C on Dec 19, 2025, 4:24 PM
What kind of fluids can I run through this without causing problems?
Answer by: Customer Support on Dec 21, 2025, 9:33 AM
Eaton's fluid compatibility guide is the best place to check. There's a link to it right here with the product details.
Question by: Lee B on Jan 14, 2026, 6:32 PM
trying to match up a fitting i pulled off an A/C hose, is this one the straight female 37 degree flare with -8 hose size?
Answer by: Customer Support on Jan 16, 2026, 12:33 PM
Match it up by the key identifiers: it is a straight female SAE 37 degree flare fitting in the Eaton Aeroquip E-Z Clip system, with a -8 hose dash size and a 0.75 inch end size on the female end.
Question by: Steve R on Sep 14, 2025, 12:01 PM
these are going into an A/C refrigeration setup on some heavy equipment we run. the hose we're connecting is a -8 dash size. this fitting gonna work for that?
Answer by: Customer Support on Sep 15, 2025, 12:48 PM
For a -8 hose dash size, you're in good shape. That's exactly what this fitting is rated for, and the 0.75-inch end size lines up with standard connections in A/C refrigeration hose assemblies. The E-Z Clip system it belongs to was built with that kind of application in mind, so fitment on a -8 hose should be straightforward without any modification.

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