1-1/4 in FNPT 304 Stainless Steel Locknut, Class 150, 2-1/16 in Hex Size

The ZORO SELECT - 4381038060 is a stainless steel locknut designed to secure conduit, fittings, or pipe hubs to enclosures, junction boxes, or mounting surfaces by clamping the fitting’s threaded neck and preventing axial movement. Constructed from 304 stainless steel, this locknut offers resistance to corrosion and includes a threaded FNPT connection compatible with 1 1/4 inch Class 150 pipe fittings. It is rated for use with air, natural gas, non-potable water, oil, and steam systems within specified pressure ranges, with a maximum operating pressure of 300 psi and a maximum steam pressure of 150 psi. The product conforms to ASTM-A-351 material standards, ANSI/ASME B1.20.1 thread specifications, and MSS-SP-114 Class 150 pressure rating.

Key Features:

• Material: 304 stainless steel, providing corrosion resistance.
• Nominal Pipe Size: 1 1/4 in with FNPT connection type.
• Pressure Rating: Class 150 with a maximum operating pressure of 300 psi.
• Applicable for conveying air, natural gas, non-potable water, oil, and steam.
• Hex Size: 2 1/16 in for wrench engagement.
• Overall Length: 7/16 in and bolt hole center-to-center distance of 1 1/4 in.
• Standards Compliance: ASTM-A-351 material, ANSI/ASME B1.20.1 threads, MSS-SP-114 Class 150 pressure rating.