Stewart Fastener J1048ASHZ Hex Washer Head Tapping Screw

Product Description

The STEWART FASTENER J1048ASHZ is a No. 10 x 3 inch hex washer head tapping screw designed for fastening metal components in light commercial and residential construction, HVAC ductwork, and general sheet metal applications. The hex washer head provides a broad bearing surface and allows for reliable torque application with a standard hex driver or nut driver. The self-tapping thread form cuts its own mating thread on installation, eliminating the need for a pre-tapped hole in compatible base materials. Licensed tradespeople and experienced installers handling sheet metal assemblies, equipment panels, and structural attachments will find this fastener suited to high-volume field work.

This tapping screw is commonly used in HVAC duct assembly, equipment enclosures, electrical panel trim, and light structural metal connections where a secure, vibration-resistant fastening point is required. The 3 inch length accommodates stacked or thicker material assemblies typical of commercial equipment installations. It is well suited for trade professionals working with sheet metal gauges common in HVAC and light construction environments.

Key Features

• No. 10 x 3 inch sizing for medium to heavy sheet metal fastening tasks
• Hex washer head style allows high torque application and provides a built-in bearing washer surface
• Self-tapping thread eliminates pre-tapping and speeds field installation
• Compatible with standard hex nut drivers and power screwdrivers
• Suited for HVAC ductwork, equipment panels, and general sheet metal assembly

Compatibility

Designed as an OEM-style replacement and general-use tapping screw for sheet metal fastening applications in HVAC, electrical, and light construction assemblies.

Installation Notes

Installation is typically performed by HVAC technicians, sheet metal workers, or electricians using a hex nut driver or impact driver set to the appropriate clutch setting to avoid stripping the head or overdriving into thin gauge material. Always ensure the base material is clean and free of debris before driving the screw. Follow applicable local building codes and manufacturer guidelines for fastener spacing and pull-out load requirements. Do not reuse a self-tapping screw in the same hole, as thread engagement will be compromised.

Technical Specifications

• Thread Size: No. 10
• Length: 3 inches
• Head Type: Hex Washer Head
• Screw Type: Self-Tapping

Standard Information

• Brand: STEWART FASTENER
• Manufacturer Part Number: J1048ASHZ