Red Steel Paper Insulating Flat Washer Insulation Gasket Pad Ring Spacer M2–M16

Red Steel Paper Insulating Flat Washer Insulation Gasket Pad Ring Spacer M2–M16

Red steel paper (phenolic paper laminate) insulating flat washers for high-temperature electrical isolation in power electronics, motor assemblies, and transformer mounting. Steel paper (also known as fish paper or vulcanized fiber) provides superior heat resistance and dielectric strength compared to PVC or nylon washers, making it the preferred choice for motor terminal boards, power supply assemblies, and high-current applications.

Key Specifications

Why Choose Red Steel Paper Insulating Washers?

• High-temperature resistance — rated to 130°C continuous; suitable for motor terminals, transformer mounting, and power electronics
• Superior dielectric strength — higher voltage isolation than PVC or nylon washers
• Compressible gasket material — conforms to surface irregularities for reliable sealing and isolation
• Red color coding — easy visual identification of insulating washers in assembly
• Wide size range — M2 to M16 covers all standard power electronics and motor assembly sizes

Typical Applications

• Motor terminal board insulation (AC/DC motors, servo motors)
• Transformer and inductor mounting isolation
• Power supply PCB and heatsink isolation
• High-current bus bar and terminal block insulation
• Battery pack cell isolation and spacing
• Industrial control panel high-voltage terminal insulation

Compatible With

M2–M16 metric screws and bolts. Suitable for use in: motor terminal boards, transformer mounting frames, power supply assemblies, and industrial control panels requiring Class B (130°C) insulation rating.

FAQ

Q: What is steel paper / fish paper?
A: Steel paper (also called fish paper or vulcanized fiber) is a dense, compressed cellulose-based material impregnated with phenolic resin. It has excellent dielectric strength, mechanical toughness, and heat resistance, making it the standard insulating material for motor terminal boards and power electronics.

Q: What is the temperature rating?
A: Red steel paper washers are rated to approximately 130°C continuous (IEC Class B insulation). For higher temperatures (up to 180°C), use Class H rated mica or PTFE washers.

Package Contents

• Red steel paper insulating flat washer gasket spacers (quantity and size per selected variant)