Stewart Fastener J1212ACHZ Hex Washer Head Tapping Screw Zinc

Product Description

The STEWART FASTENER J1212ACHZ is a No. 12 x 3/4 inch Type A hex washer head tapping screw with a zinc finish, sold individually from a jar of 100 units. Type A tapping screws are designed for threading into pre-punched or pre-drilled sheet metal, thin steel, and similar light-gauge materials. The hex washer head provides a built-in bearing surface and accepts a standard hex driver or nut driver for fast, secure installation. Zinc plating delivers basic corrosion resistance suitable for interior and sheltered mechanical applications. HVAC technicians, plumbers, and electricians commonly use this screw size for securing sheet metal panels, equipment covers, and junction boxes.

This screw is well suited for light commercial and residential trade applications where quick sheet metal fastening is required. Typical uses include ductwork assembly, equipment enclosure panels, electrical boxes, and general mechanical assembly where a Type A thread-forming screw is specified. The hex washer head style is favored by trade professionals for its speed with a magnetic hex driver bit and its resistance to cam-out under torque.

Key Features

• No. 12 x 3/4 inch Type A tapping screw for thread-forming in light-gauge sheet metal
• Hex washer head with integral bearing surface — accepts standard hex or nut driver
• Zinc finish for basic corrosion resistance in interior and sheltered applications
• Sold per each unit drawn from a 100-count jar — matches common bulk trade purchasing
• Compatible with magnetic hex driver bits for fast one-handed installation

Compatibility

Designed as a standard Type A hex washer head tapping screw for use in pre-punched or pre-drilled light-gauge sheet metal and similar thin-material applications common in HVAC, electrical, and plumbing trades.

Installation Notes

Type A tapping screws require a pre-punched or pre-drilled pilot hole sized to the manufacturer's recommended diameter for the material gauge being fastened. A hex nut driver or magnetic hex bit driver is the standard tool for this head style. Ensure power is removed from any electrical enclosure before fastening panels or covers. Do not overdrive — stop driving when the washer head seats flush against the material surface to avoid stripping the formed threads.

Technical Specifications

• Size: No. 12 x 3/4 inches
• Head Style: Hex Washer Head
• Thread Type: Type A Tapping
• Finish: Zinc
• Quantity per Jar: 100
• UPC: 662352111027

Standard Information

• Brand: STEWART FASTENER
• Manufacturer Part Number: J1212ACHZ