Description

Overview

The 1/4 x 1/4 NPTF female connector joins 1/4-inch OD imperial nylon air-brake tube to a 1/4 NPTF male threaded component in a straight line. Its push-to-connect tube end and female pipe thread create a compact tube-to-thread transition for pneumatic plumbing.

Features

• 1/4-inch OD push-to-connect tube connection
• 1/4 NPTF female pipe thread
• Brass straight body with installation hex
• Reusable push-in collet for tube removal

Specifications and Materials

This DOT female connector combines an imperial 1/4-inch tube port with a 1/4 NPTF female pipe thread. The straight brass body keeps both connections on the same axis.

Part number: DQ66DOT0404.

See the manufacturer DOT push-to-connect fitting chart

Compatibility and Fitment

Confirm both sides before ordering. The tube end requires 1/4-inch OD imperial tubing and the threaded end requires a 1/4 NPTF male connection. The main mismatch risk is selecting a similar 1/4 x 1/8 female connector or a male connector with an external thread. Cut the tube square and push it fully into the collet.

These cross-references show where this part replaces the part numbers and applications listed. Some installations may need minor changes. 35-660404, 35660404, AQ66-DOT-4X4, AQ66DOT4X4, 18664X4, 3114 56 11DOT, 31145611DOT, S66PMT-4-4, S66PMT44, 13B7.13B664B, 13B713B664B, 266PPDOT-4B, 266PPDOT4B, 966-44, 96644, PP66CC-DOT, PP66CCDOT, 1866-4-4, 186644, 1866X4X4, DOT66-4-4, DOT6644, G31150-0404, G311500404, 2466-4-4, 246644, APB66F4X4, 660404, 66PMT-4-4, 66PMT44, 66PTC-4-4, 66PTC44, PL1366-4B, PL13664B, 87046, 966-4-4PXDOT, 96644PXDOT

Compliance and Safety

This DOT push-to-connect fitting family is approved to meet ADR 38/05, DOT FMVSS 571.106, SAE J2494/3 and SAE J1131. Depressurise the air system before disconnecting the tube, inspect the tube end for damage, then leak-check the push-in joint and threaded connection after service.

Trailer Applications

The 1/4 x 1/4 NPTF female connector suits truck and trailer pneumatic plumbing where a 1/4-inch nylon air line connects to a 1/4-inch male threaded port. It suits air-brake valve groups and auxiliary pneumatic circuits where a straight tube-to-thread transition is required.

Cross-reference and Suitability

This part cross-references to or suits the following equivalent part numbers and compatible alternatives:

Why Choose ICS Trailers

ICS Trailers supplies air fittings for repairs where tube OD, thread size and connector gender must all match. Compare those three details before ordering if the old fitting is difficult to identify.

Browse more Air Fittings