Value Collection 1138 M4.2x1.41 Spring Steel U Nut

Product Description

The VALUE COLLECTION 1138 is a metric U nut designed for M4.2x1.41 screw thread engagement. This spring steel push-on fastener clips onto panel edges or flanges and provides a captive threaded receptacle for machine screws without requiring a pre-drilled threaded hole. U nuts are widely used in HVAC cabinet assembly, electrical enclosures, and sheet metal fabrication where fast, tool-free nut placement is required before final fastening. The 1138 accommodates panel or flange stock ranging from 3.18 mm to 6.35 mm thick, making it suitable for light-gauge sheet metal applications common in residential and commercial equipment assembly.

This U nut is applied wherever M4.2 metric screws are used to secure panels, covers, or access doors on HVAC units, electrical enclosures, or similar fabricated assemblies. It is typically installed during manufacturing or field reassembly by HVAC technicians, electricians, or sheet metal workers who need a reliable threaded anchor point on thin panel stock. The spring steel construction provides consistent clamping force and resists backing off under vibration, which is a common concern in mechanical equipment enclosures.

Key Features

• M4.2x1.41 thread size for compatibility with standard metric M4.2 machine screws
• Accepts panel or flange thickness from 3.18 mm to 6.35 mm
• Spring steel construction provides secure retention and vibration resistance
• Push-on clip design allows tool-free installation prior to screw assembly
• Metric fastener system for use in metric-dimensioned equipment and enclosures

Compatibility

Designed for use with M4.2x1.41 metric machine screws on sheet metal panels or flanges between 3.18 mm and 6.35 mm thick, typical of light-gauge HVAC cabinet and electrical enclosure construction.

Installation Notes

U nuts are installed by sliding or pressing the clip onto a panel edge or into a prepared slot before driving the mating screw. Ensure the panel thickness falls within the specified 3.18 mm to 6.35 mm range before installation to achieve proper clamping force. Verify the correct screw thread size before assembly, as using an incorrect thread pitch will damage the nut. When servicing energized electrical enclosures or HVAC equipment, de-energize and lock out the equipment per applicable NFPA 70E and OSHA procedures before accessing panel fasteners.