Gardner Bender MSW-1540 Wire Staple 40 Count Steel Fiber

Product Description

The GARDNER BENDER MSW-1540 is a steel fiber insulated wire staple used to secure and protect low-voltage wiring in residential and light commercial applications. Each staple measures 0.125 inches wide by 0.625 inches long and features a fiber insulating liner that cradles the wire without pinching or damaging the jacket. The steel construction provides firm holding power against framing and structural surfaces. This 40-count pack is sized for quick installation work where repeated fastening is needed across runs of bell wire, speaker wire, thermostat wire, or telephone cable.

These staples are suited for light electrical and low-voltage wiring work in walls, ceilings, and framing cavities. Electricians and HVAC technicians commonly use insulated wire staples when routing thermostat wire from a furnace or air handler to a wall-mounted control. They are also used by low-voltage installers securing speaker runs, doorbell circuits, and telephone drops. The fiber insulator prevents direct metal-to-metal contact between the staple and the wire, reducing the risk of conductor damage during fastening.

Key Features

• Steel construction for firm, durable hold against wood framing and similar substrates
• Fiber insulating liner cradles wire and protects jacket from staple edges
• Sized at 0.125 inches x 0.625 inches to fit common low-voltage wire gauges
• Compatible with bell, speaker, thermostat, and telephone wiring applications
• 40-count pack suited for single-room or multi-run installations

Compatibility

Designed for use with low-voltage wiring including bell wire, speaker cable, thermostat wire, and telephone cable routed through residential or light commercial construction.

Installation Notes

These staples are typically driven with a hammer or a compatible staple gun rated for insulated wire staples. Ensure the wire is laid flat and positioned within the fiber liner before driving the staple to avoid jacket compression or conductor damage. Follow NEC Article 725 guidelines for Class 2 and Class 3 low-voltage wiring when routing thermostat or bell wire. Do not over-drive the staple, as excessive force can crush the wire jacket and create a fault point.

Technical Specifications

• Width: 0.125 inches
• Length: 0.625 inches
• Material: Steel with fiber insulator
• Count: 40 per pack
• Weight: 0.108 pounds
• UPC: 00032076154011

Standard Information

• Brand: GARDNER BENDER
• Manufacturer Part Number: MSW-1540