1-1/4 inch x 4-1/2 inch Stainless Steel Nipple

1-1/4” x 4-1/2” Stainless Steel Nipple – Threaded Pipe Segment for High-Corrosion Applications

The 1-1/4” x 4-1/2” Stainless Steel Nipple is a precision-machined pipe segment with male National Pipe Taper (NPT) threads at both ends, designed to join two female-threaded components in corrosive, high-pressure, or sanitary environments. Manufactured from stainless steel—typically conforming to ASTM A312, A733, or A554 specifications—this fitting is suitable for use in chemical processing, food-grade systems, potable water applications, and industrial fluid handling.

Its solid stainless steel construction provides resistance to corrosion, high temperatures, and mechanical wear. The short length allows for compact installations where spacing and pipe alignment are critical. Threads are cut to ANSI/ASME B1.20.1 standard, ensuring compatibility with a wide range of threaded system components.

Key Technical Features

• ✅ Material: 304 or 316 Stainless Steel (specify grade as required for media compatibility)
• ✅ Nominal Size: 1-1/4” NPT
• ✅ Length: 4-1/2” overall
• ✅ End Connections: Male NPT x Male NPT
• ✅ Thread Standard: ANSI/ASME B1.20.1
• ✅ Surface Finish: Typically mill finish; available in polished options for sanitary use

Installation Guidelines

Install using compatible thread sealant or PTFE tape, ensuring proper alignment to avoid thread galling, especially in stainless-to-stainless connections. Use appropriate tools with care to prevent thread deformation. Pressure-test after assembly to validate seal integrity. Avoid cross-threading and over-torquing to maintain fitting longevity and system performance.

Application Scope

This stainless steel nipple is commonly used in:

• Process piping in chemical and pharmaceutical manufacturing
• Potable water distribution and backflow prevention assemblies
• Marine systems and wash-down stations
• Hydronic and mechanical system risers

Regulatory and Material Notes

Stainless steel nipples used in potable water systems must comply with NSF/ANSI 61 and 372 (low lead content) if required by jurisdiction. Grade 316 is recommended for chloride-rich or coastal environments due to enhanced corrosion resistance over 304 stainless steel.