Gibraltar TS-840-G Steel Thumb Screw M8 X 1.25 Knurled

Product Description

The GIBRALTAR TS-840-G is a metric thumb screw designed for hand-tightening applications where tools are impractical or unnecessary. It features an M8 x 1.25 thread, a 30 mm diameter knurled plastic head in black, and a shouldered shank with a 16 mm shoulder diameter. The zinc-plated steel construction resists corrosion in light-duty environments. Overall length is 59.5 mm with an 11 mm head height. This fastener is commonly installed by HVAC technicians, electricians, and equipment assemblers when securing panels, covers, access doors, or jigs that require frequent removal and reinstallation without tooling.

The TS-840-G is suited for panel access, enclosure covers, fixture mounting, and equipment assembly in both residential and commercial settings. The shouldered design helps locate and align mating components during repeated assembly cycles, making it a practical choice for service panels, electrical enclosures, and mechanical access covers where hand-access is preferred. The metric M8 x 1.25 thread standard is widely used in imported equipment and metric-dimensioned assemblies across HVAC, electrical, and industrial trades.

Key Features

• M8 x 1.25 metric thread for compatibility with standard metric hardware
• 30 mm diameter knurled plastic head for secure, tool-free hand tightening
• With-shoulder design aids component alignment and locating during assembly
• Zinc-plated steel shank provides corrosion resistance in light-duty service
• Black head color for clean, professional appearance on panels and enclosures
• 59.5 mm overall length accommodates common panel and enclosure thicknesses

Compatibility

Designed as a standard metric thumb screw replacement or new installation fastener for equipment panels, enclosure covers, and access doors using M8 x 1.25 metric threads.

Installation Notes

Thumb screws are typically installed and removed by hand; avoid using a wrench or driver on the plastic head as this may crack or deform it. Always de-energize electrical equipment before removing or installing panel fasteners per NFPA 70 (NEC) requirements. Inspect the mating threaded insert or nut plate for thread condition before installation to avoid cross-threading. Shoulder diameter and overall length should be verified against the mating panel assembly prior to installation.