Insulator/Mounting kit (Screw+Washer+Bushing+Insulator), to-3 Heat Sink Insulator Mounting Kit for MOSFET Transistor Voltage Regulator

TO-3 Heat Sink Insulator Mounting Kit — Screw, Washer, Bushing & Insulator    1   Per  Pack

Everything you need to properly mount and isolate a TO-3 package device to a heat sink — in one kit. Designed for MOSFETs, bipolar power transistors, and voltage regulators in the TO-3 can, this hardware set ensures correct electrical isolation while maintaining the thermal contact needed to keep your devices cool under load.

Whether you're servicing a linear amplifier, rebuilding a bench power supply, or restoring vintage audio gear, this kit eliminates the frustration of sourcing individual hardware pieces that often arrive in the wrong size or material.

Kit Contents

• TO-3 mica insulating washer — electrical isolation with low thermal resistance
• Nylon shoulder bushings — isolates mounting screws from chassis/heat sink
• Steel mounting screws — sized for standard TO-3 footprint
• Flat washers — for even clamping force and surface protection

Key Features

• Full isolation hardware — mica + nylon bushings prevent ground faults and chassis shorts
• Low thermal resistance — mica maintains excellent heat transfer from case to sink
• TO-3 specific fit — precision-matched to the standard TO-3 mounting hole pattern
• Compatible devices — MOSFETs, NPN/PNP power transistors, linear voltage regulators in TO-3 packages
• Professional quality — suitable for commercial repair shops, hobbyist benches, and production builds

Typical Applications

• Amateur radio linear amplifier output stage mounting
• High-current bench and switching power supply builds
• Vintage audio amplifier restoration (output transistor replacement)
• Voltage regulator heat sink mounting in DC power systems
• MOSFET heat dissipation in motor controllers and inverters

A proper isolation kit is the difference between a reliable repair and a callback. Stock your bench with the right hardware.