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Danfoss / Eaton Aeroquip FJ3901-1212S FTGS(P) REFRIG SAE 37 CS Steel and HNBR Compatible Hose ID 1 1/16 - 12 IN Female

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Description & Features

This Eaton Aeroquip fitting assembly is designed for refrigeration applications using SAE 37° flared connections. Constructed from carbon steel, this fitting ensures durability and dependable performance across a wide range of applications.

The Danfoss / Eaton Aeroquip FJ3901-1212S fitting features a female end with a hose dash size of -12, compatible with a 1 1/16 - 12 IN hose ID. It is designed for ease of assembly, helping to cut assembly times and boost production. This fitting assembly is compatible with HNBR.

SKU: FJ3901-1212S

Supplier Part Number (MPN): FJ3901-1212S

Specifications

Brand
Aeroquip® by Danfoss
a Dimensions
2.53 in
Compatible Hose ID
19 mm
Connection Size 1
3/4 in
Connection Size 2
3/4 in
Connection Type
Female JIC Swivel, Hose
Connection Type 1
Hose
Connection Type 2
Female 37 deg Swivel
Construction Style
Crimp
Cut-Off Factor
1.57 in
Drop Dimensions
1.48 in
End Connection Torque
79 to 92 ft-lb
End Gender 1
Female
End Size 1
12
Finish
Zinc-Plated
Fitting Type
90 deg Elbow
For Use With
A/C Refrigeration Hoses
Hex Size
1-1/4 x 1 in
Hose Dash Size
12
Inside Diameter
0.42 in
Material
Steel
Material Construction
Carbon Steel
Seal Material
HNBR
Series
FJ3901 Series
Thread Sealant
Without Thread Sealant
Thread Size
1-1/16-12
Thread Type
UN

Product Questions & Answers (3)

Question by: Wes J on May 14, 2025, 4:38 PM
Will this fitting hold up alright in a refrigeration system?
Answer by: Customer Support on May 15, 2025, 4:59 PM
This Eaton Aeroquip fitting is constructed from carbon steel, so it's durable enough to handle the demands of refrigeration applications using SAE 37° flared connections.
Question by: Brenda T on Jun 10, 2025, 3:04 PM
trying to swap out a -12 hose end, is this FJ3901-1212S the right one for a 1 1/16-12 hose ID with a 37 degree flare?
Answer by: Customer Support on Jun 12, 2025, 7:52 AM
It matches a -12 hose dash size and calls out compatibility with a 1 1/16-12 inch hose ID, and the connection style is SAE 37 degree flare with a female end.
Question by: Wes H on Mar 18, 2026, 7:18 PM
What kind of hose does this fitting hook up to, and is it a female connection on both ends or just the one?
Answer by: Customer Support on Mar 20, 2026, 6:45 AM
Female end on the hose side, sized for a -12 hose dash with a 1 1/16 - 12 inch hose ID. The other end runs SAE 37 degree flare. So you've got a female flare connection meeting up with your hose end, which is a pretty standard setup for refrigeration line work using that style of flared fitting.

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