B K/mueller Inds(import) 581-001HN Black Close Nipple

Product Description

The B K/MUELLER INDS(IMPORT) 581-001HN is a black close nipple in a 1/4 inch pipe size. A close nipple has no exposed center unthreaded section — the threads from each end meet at the midpoint, making it the shortest possible nipple for that pipe size. It is used to join two fittings with minimal spacing between them. Licensed plumbers and pipefitters install this type of nipple in gas distribution, water supply, and industrial pipe assemblies where compact fitment is required. The unit weight is 0.2 pounds.

This close nipple is suited for residential and light commercial piping applications where a tight, back-to-back fitting connection is needed. Typical install scenarios include gas meter manifolds, boiler supply and return headers, and compressed air lines. It ships in a package quantity of 10 units, making it practical for service trucks or shop stock. The black finish is standard for low-pressure gas piping per common code requirements.

Key Features

• Close pattern — no exposed center thread, minimizes overall assembly length
• 1/4 inch nominal pipe size with NPT threads on both ends
• Black finish suitable for low-pressure gas piping applications
• Lightweight at 0.2 pounds per nipple
• Packaged in quantities of 10 for shop or truck stock convenience

Compatibility

Designed as a standard OEM-style replacement or new-installation fitting compatible with 1/4 inch NPT threaded pipe fittings in gas, water, and general-purpose piping systems.

Installation Notes

Installation is performed by a licensed plumber or pipefitter. Shut off and depressurize the line before removing or installing any threaded nipple. Apply an approved thread sealant or PTFE tape rated for the intended service medium before assembly. Tighten to fitting manufacturer specifications using a pipe wrench — do not overtighten, as this can crack cast fittings. Gas piping installations must comply with applicable local codes and IFGC requirements.