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Knox Trailers · Air System
68NAB-8-4
In stock · ships from Knoxville
This is a brass male connector fitting designed for DOT air brake systems.
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Verified fitment for 3 applications
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All confirmed applications for this part number.
Other applications
Other applications
Fits any vehicle equipped with 1/2" OD SAE J844 Type A or B nylon air brake tubing and a 1/4" NPT female port. The part number follows an industry-standard size coding (8 = 1/2" tube, 4 = 1/4" NPT) and is interchangeable with multiple manufacturers' equivalent parts.
Part data verified against 4 catalog sources
Numbers this part supersedes or interchanges with. Showing 3 of 3.
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It accepts 1/2-inch outside diameter SAE J844 nylon tubing on one end and provides a 1/4-inch male NPT thread on the other end for connecting to a port, valve, or other component. The fitting uses a compression nut and sleeve to create a secure, leak-free connection without the need for thread sealant on the pipe threads. Operating at up to 150 PSI and across a temperature range of -40°F to 200°F, it is commonly used in heavy-duty truck and trailer air brake lines, air suspension controls, and in-cab air accessories like horns and seats.
Part Number: 68NAB-8-4
BRASS FITTING
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside air system
