1-1/4 inch x Close Stainless Steel Nipple

1-1/4" Stainless Steel Nipple – Threaded Schedule 40 Fitting for Corrosion-Resistant Applications

The 1-1/4" Stainless Steel Nipple is precision-machined from Schedule 40 seamless stainless steel pipe and features male National Pipe Thread (NPT) ends for reliable, pressure-rated connections. Designed for use in aggressive environments, this nipple provides excellent mechanical integrity and corrosion resistance across a broad range of applications including potable water, industrial process lines, and compressed air systems.

Manufactured to ASTM A312 and ANSI B1.20.1 specifications, this fitting is ideal for piping systems that require long service life and compatibility with stainless steel components. Its uniform wall thickness and clean thread engagement contribute to dependable sealing in critical installations.

Key Performance Characteristics

• ✅ Material: 304 or 316 stainless steel (verify material grade for application compatibility)
• ✅ Nominal Size: 1-1/4 inch
• ✅ Thread Type: Male NPT, precision-machined to ANSI B1.20.1 standards
• ✅ Wall Thickness: Schedule 40 (standard weight)
• ✅ Operating Range: Suitable for high-pressure and temperature conditions depending on system requirements

Installation Guidance

For optimal performance, apply thread sealant or PTFE tape to male threads prior to installation. Use calibrated torque to prevent thread distortion, and always inspect for galling when mating stainless steel to stainless steel. Avoid mixing dissimilar metals without dielectric unions to prevent galvanic corrosion. Install in accordance with applicable mechanical and plumbing codes.

Common Applications

• Potable water distribution (lead-free compliant where required)
• Chemical and food-grade processing systems
• Compressed air lines and vacuum systems
• Fire protection and HVAC mechanical piping
• Marine, pharmaceutical, and wash-down installations

Did You Know?

Stainless steel Schedule 40 nipples are preferred in environments where mild steel or galvanized components would corrode, such as coastal facilities, high-temperature systems, or locations exposed to aggressive cleaning agents.

The 1-1/4" Stainless Steel Nipple is a durable, pressure-rated fitting designed for critical service. Its high corrosion resistance, strength under pressure, and code-compliant construction make it a staple component for contractors demanding performance in commercial and industrial plumbing applications.