Parker L3C Pneumatic Coupling Nipple 1/4-18 Nptf Lincoln Long Stem

Product Description

The PARKER L3C is a pneumatic hose coupling nipple designed for compressed-air and fluid-transfer lines requiring a reliable threaded connection. Built from steel with a zinc chromate finish, this Series 70 nipple features a 1/4-18 female NPTF thread and a 0.25-inch body diameter. It is rated for a maximum working pressure of 300 psi and operates across a temperature range of -40 degrees F to 250 degrees F. The L3C is an appropriate drop-in component for industrial and commercial pneumatic systems where a Lincoln Long Stem interchange fitting is specified. Installation is performed by licensed pipefitters, millwrights, or experienced maintenance technicians.

The L3C fits applications in manufacturing, industrial automation, and maintenance environments where Series 70 quick-disconnect style couplings are the shop standard. The Lincoln Long Stem interchange pattern makes this nipple compatible with tools, hoses, and manifolds already fitted to that standard. Its threaded connection type and compact hex geometry suit tight-clearance installations. The zinc chromate finish provides corrosion resistance in light-duty industrial environments. With an overall length of 2.1 inches and a hex size of 0.62 inches, it integrates cleanly into standard pneumatic hose assemblies without modification.

Key Features

• Lincoln Long Stem interchange pattern for broad shop-standard compatibility
• 1/4-18 female NPTF threaded connection for leak-resistant, dry-seal engagement
• 300 psi maximum working pressure rating
• Operating temperature range of -40 degrees F to 250 degrees F
• Steel construction with zinc chromate finish for corrosion resistance
• Series 70 nipple format, overall length 2.1 inches

Compatibility

Designed as an OEM-style replacement or service fitting for pneumatic hose systems requiring a Series 70 Lincoln Long Stem interchange nipple with a 1/4-18 female NPTF thread.

Installation Notes

Shut off and bleed all line pressure before disconnecting or installing any pneumatic coupling. Thread engagement should be made hand-tight first, then wrench-tightened using the hex flats — do not grip the body or stem with pipe wrenches. NPTF threads are designed for dry-seal connections; thread sealant is generally not required but may be applied per shop practice. Follow applicable OSHA and ASME B31.1 guidelines for compressed-air piping work.