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Imperial · Hardware & Fasteners
91221
In stock · ships from Knoxville
A 1/4-inch push-to-connect male connector used in heavy truck and trailer air brake systems.
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Verified fitment for 1 applications
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All confirmed applications for this part number.
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Other applications
Standard push-in air brake fitting; not specific to a single vehicle make or model. Works on any system plumbed with 1/4" DOT air hose and 1/4" NPT ports.
Part data verified against 2 catalog sources
Numbers this part supersedes or interchanges with. Showing 8 of 8.
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It lets you quickly join 1/4" nylon air brake tubing to a 1/4" NPT female port without tools—just push the tubing in. These fittings are found throughout the vehicle on brake lines, suspension, and accessory air circuits. You replace them when they start leaking, when the plastic body cracks, or if the tubing won’t lock in place.
Part Number: 91221
A/B ML UNION
Unit: ea
Dealer: KP Services Crossville
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