1/2 inch x 8 inch Black Steel Nipple

1/2" x 8" Black Steel Nipple – For High-Strength Threaded Connections

The 1/2" x 8" black steel nipple is manufactured for use in industrial and residential mechanical systems where threaded pipe sections are required. It provides a rigid, threaded coupling point between black steel pipe lengths, valves, or other fittings, particularly in gas, air, or oil systems where durability and pressure resistance are critical.

Produced from welded steel pipe and precision-threaded on both ends, this fitting supports systems requiring exact alignment and consistent thread engagement. Its external coating offers moderate corrosion resistance for above-ground applications, though it is not suitable for potable water use due to its untreated internal surface.

Key Performance Features

• ✅ Threaded NPT Ends – Machined to ANSI B1.20.1 standards for compatibility with standard 1/2" NPT fittings.
• ✅ Schedule 40 Wall Thickness – Provides structural integrity for medium-pressure fluid and gas applications.
• ✅ Welded Steel Pipe Body – Meets ASTM A53 Type E or A106 standards for dimensional consistency and strength.
• ✅ Black Oxide Finish – Protects the exterior surface from rust in non-corrosive environments.

Technical Specifications

• Nominal Size: 1/2 inch
• Length: 8 inches
• Material: Carbon steel
• Wall Schedule: Schedule 40
• Ends: Male NPT both ends
• Compliance: Manufactured in accordance with ASTM A733 for pipe nipples

Installation Guidelines

Install using compatible female-threaded black or galvanized malleable iron, cast iron, or steel fittings. Use thread sealant or PTFE tape on male threads to improve joint seal integrity. Torque should be applied with care to avoid overtightening, which may distort threads and compromise sealing.

Applications

This nipple is commonly used in gas distribution, HVAC systems, compressed air systems, and closed-loop hydronic heating circuits. It is also applicable in low- to medium-pressure industrial process systems where iron pipe is specified.

Note on Use

Black steel pipe nipples are not approved for use with potable water systems. For corrosion-critical or potable applications, galvanized or stainless alternatives should be considered.