Description

Overview

The 1/4 x 1/8 NPTF female connector joins 1/4-inch OD imperial nylon air-brake tube to a 1/8 NPTF male threaded connection in a straight line. One end uses a push-to-connect collet, while the opposite end provides the female pipe thread, creating a compact tube-to-thread connection for pneumatic plumbing.

Features

• 1/4-inch OD push-to-connect tube connection
• 1/8 NPTF female pipe thread
• Straight brass body with installation hex
• Reusable collet releases the tube for servicing

Specifications and Materials

Configuration: DOT push-to-connect female connector. Tube connection: 1/4-inch OD imperial tube. Thread connection: 1/8 NPTF female. The brass body carries a retained tube collet at one end and an internal female thread at the other.

Part number: DQ66DOT0402.

See the manufacturer DOT push-to-connect fitting range for family specifications and connection styles

Compatibility and Fitment

Confirm both connection sizes before ordering. The tube side requires 1/4-inch OD tubing, while the threaded side accepts a 1/8 NPTF male connection. Do not confuse this fitting with a male connector, which has an external pipe thread. Cut the tube square, remove damaged material, then 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. 35-660402, 35660402, AQ66-DOT-4X2, AQ66DOT4X2, 1866X4, 3114 56 11DOT, 31145611DOT

Compliance and Safety

This DOT fitting family meets ADR 38/05, FMVSS 571.106, SAE J2494/3 and SAE J1131 requirements. Depressurise the air circuit before installation. Apply suitable pneumatic thread sealant to the mating male thread without allowing excess material into the bore. After assembly, restore pressure and leak-check both connection points.

Trailer Applications

The 1/4 x 1/8 NPTF female connector suits compatible truck and trailer air-brake, air-suspension and auxiliary pneumatic circuits where a 1/4-inch air line terminates at a small male threaded component. Its straight layout keeps the connection aligned without adding elbow offset.

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 push-in air fittings, nylon tube and threaded pneumatic components for trailer repairs. If an old connector has unclear markings, compare the tube OD, thread size and connector gender before ordering.

Browse more Air Fittings