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Brass Push>Connect Air Brake Tube Fitting, 0.25 Inch Tube OD To 3/8-18 Male NPT, Straight

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Description & Features

Engineered to meet D.O.T. FMVSS 571.106 and SAE J1131 air brake system performance standards the brass push>connect air brake tube fitting features a robust body and collet made from CA360 brass ensuring durability under demanding conditions. The connector accommodates a 0.25 Inch Tube OD to 3/8-18 Male NPT.

Designed for easy and fast assembly this one-piece fitting is reusable and field serviceable. The fitting provides moderate vibration resistance and performs reliably within a temperature range of -40F to +200F and a pressure range from vacuum to 150 psi.

Assembly of the brass push>connect fitting involves a straightforward process requiring the user to insert tubing until a solid stop is felt completing the grip and seal on the O-ring. Disassembly is similarly simple utilizing a collet head depression mechanism to release the tubing securely. The O-ring material is specified as Ethylene Propylene (EP) for optimal performance.

Ideal for quick-connect air brake tube fittings applications this product by Danfoss Power Solutions (Aeroquip Inc-Alternate) combines reliability and efficiency making it an excellent choice for professional use.

Supplier Part Number: 1868X4X6

Specifications

Brand
Danfoss Power Solutions (II LLC Aeroquip)
Brand
Aeroquip
Pack Size
1.00
UOM
EA
L
1.27
Supplier Part Number
1868X4X6
Thread 1
3/8-18
Tube O.D.
0.25
Tube O.D.
0.25
Alternate Part Numbers
Alternate Part Number 610-0079, Alternate Part Number C1HN19, Alternate Part Number MI-02753982, Alternate Part Number MINO-00015X03597, Alternate Part Number MINO-00925X10261
Product Weight
0.07 lbs

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Product Questions & Answers (3)

Question by: Dwayne Y on Apr 24, 2025, 4:09 PM
Will this fitting hold up alright if I'm using it in a system that vibrates a bit?
Answer by: Customer Support on Apr 26, 2025, 2:33 PM
This brass push-to-connect fitting offers moderate vibration resistance, so it should work fine in systems where vibration isn't too extreme.
Question by: Ross F on Nov 16, 2025, 9:40 AM
fitting says it goes vacuum to 150 psi -- is that enough for a standard air brake line or am I gonna need something beefier?
Answer by: Customer Support on Nov 17, 2025, 11:10 AM
For typical air brake system pressures, 150 psi is right in the working range. These systems generally run well under that ceiling, so this fitting handles the load without issue. The vacuum-to-150 psi range covers both ends of what you'd encounter in normal air brake service, and it carries D.O.T. FMVSS 571.106 and SAE J1131 certifications to back that up.
Question by: Tommy A on Jan 21, 2026, 9:43 PM
got 1/4 inch air brake tubing. does this fitting go straight into it and seal up, or do i need anything else?
Answer by: Customer Support on Jan 23, 2026, 8:27 AM
For a 1/4 inch tube OD, it is a push to connect style that seals by gripping the tube and seating on an EP O-ring. You assemble it by pushing the tubing in until you feel a solid stop, and that completes the grip and seal.