Home Air Brake Standard DOT Compression Union Brass 1/4"
Air Brake Standard
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DOT Air Brake Compression Union for Nylon Tubing, Brass, 1/4 x 1/4", Tube x Tube
(Pack of 5)

Lawson

Simplify tough jobs with our compression air connector, the versatile solution for joining pipes and tubing without soldering or welding. Designed for plumbing, HVAC, gas lines, and hydraulic applications, this connector ensures a reliable seal while saving you time and effort. Easy to install and remove with just a spanner or wrench, it eliminates the need for heat—making it safer to use in tight or heat-sensitive spaces. Durable and efficient, it’s the go-to tool professionals trust for both convenience and quality results.
• Fittings are shipped with nuts, sleeves and inserts preassembled, ready to slip onto tubing
• Meets D.O.T. FMVSS 571.106
• Temperature range: –40°F to +200°F (–40°C to +93°C)
• Exceeds pressure requirements of automotive air brake systems
• Typical applications include air brake systems, air control and gauge lines
• Used with nylon tubing (SAE J844, Type 3)
Assembly Instructions
1. Cut tubing squarely.
2. Insert tubing into fitting until bottomed on seat.
3. Tighten nut with wrench until one thread remains visible on the fitting body; or, the nut should be screwed down finger-tight, then wrench-tightened as indicated in the table (this will allow for a number of remakes).

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California Proposition 65: WARNING: Cancer and Reproductive Harm -
www.P65Warnings.ca.gov

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Product Description

Simplify tough jobs with our compression air connector, the versatile solution for joining pipes and tubing without soldering or welding. Designed for plumbing, HVAC, gas lines, and hydraulic applications, this connector ensures a reliable seal while saving you time and effort. Easy to install and remove with just a spanner or wrench, it eliminates the need for heat—making it safer to use in tight or heat-sensitive spaces. Durable and efficient, it’s the go-to tool professionals trust for both convenience and quality results.
• Fittings are shipped with nuts, sleeves and inserts preassembled, ready to slip onto tubing
• Meets D.O.T. FMVSS 571.106
• Temperature range: –40°F to +200°F (–40°C to +93°C)
• Exceeds pressure requirements of automotive air brake systems
• Typical applications include air brake systems, air control and gauge lines
• Used with nylon tubing (SAE J844, Type 3)
Assembly Instructions
1. Cut tubing squarely.
2. Insert tubing into fitting until bottomed on seat.
3. Tighten nut with wrench until one thread remains visible on the fitting body; or, the nut should be screwed down finger-tight, then wrench-tightened as indicated in the table (this will allow for a number of remakes).

Technical Specifications

Item#: 84253
Fitting Type Compression - Nylon Tubing
Style DOT
Material Brass
Configuration Union
Connection Type A x B Tube x Tube
Fitting Dimension A 1/4 "
Fitting Dimension B 1/4 "
Size 1/4
Type Compression
UNSPSC #: 25171700
TAA Compliant: No
Weight: 0.32 lb

Product Restrictions

California Proposition 65: WARNING: Cancer and Reproductive Harm -
www.P65Warnings.ca.gov

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