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Centerpost Insulators

Cal Fasteners’ centerpost insulators are manufactured from glass-reinforced polyester materials that provide exceptional strength and durability. This unique material meets UL891 safety requirements and is UL listed 94-VO for flammability.
Our centerpost insulators are available in standard heights and thread sizes, as well as custom sizes and shapes. Aluminum inserts are standard; brass and steel inserts are available upon request. Available with female or male inserts, as needed.
All our insulators are hi-pot tested at 3,000 volts and inspected for short spots, cracks, and defects.
We also offer standoff insulators and switchboard insulators.
Request a quote on centerpost insulators, or contact Cal Fasteners to learn more.

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