3/8 inch x 2 inch Black Steel Nipple

3/8" x 2" Black Steel Pipe Nipple – Schedule 40, Threaded Fitting

The 3/8" x 2" Black Steel Nipple is a Schedule 40 pipe fitting designed for use in non-potable systems requiring threaded connections. This nipple features National Pipe Taper (NPT) male threads on both ends and is manufactured from carbon steel pipe, commonly conforming to ASTM A53 standards. It is intended for use in mechanical, HVAC, compressed air, and low-pressure steam or gas systems.

Specifications

• Nominal Size: 3/8" NPT
• Length: 2" overall
• Material: Welded or seamless carbon steel
• Finish: Black (uncoated) for above-ground, dry system applications
• Wall Thickness: Schedule 40 per ASME B36.10M
• Thread Standard: ANSI/ASME B1.20.1 (tapered male pipe thread)
• Manufacturing Standard: ASTM A53, A733 for pipe nipples

Key Attributes

• ✅ Threaded Connection – Precision-machined male NPT threads ensure reliable, pressure-tight sealing when used with proper joint compound or PTFE tape
• ✅ Mechanical Strength – Schedule 40 wall thickness supports common pressures in industrial and mechanical piping
• ✅ Compatible with Standard Components – Easily joins with malleable iron, cast steel, and forged fittings

Installation Considerations

Apply approved thread sealant or PTFE tape to ensure a leak-resistant connection. Use proper threading tools and avoid excessive torque during installation to prevent thread deformation or cracking in adjacent components. Not intended for use in potable water systems or underground applications unless specifically approved by code.

Typical Applications

Commonly used in hydronic heating systems, gas distribution, compressed air setups, and general-purpose mechanical piping. The short length is ideal for close-coupling between valves, equipment, or fittings when space is limited.

Material Considerations

Black steel pipe is untreated and best suited for dry or non-corrosive environments. For installations exposed to moisture or requiring corrosion protection, a galvanized or stainless steel alternative should be used.

The 3/8" x 2" Black Steel Nipple offers reliable performance in systems that demand structural integrity and pressure resistance. It is a standard component in commercial and industrial threaded piping assemblies where durability and dimensional consistency are critical.