Engineered
for Power.
Built for
Reliability.
U.S.-manufactured transformer bushings and insulation components for utilities and OEMs since 1971.
We are dedicated to making the grid reliable, resilient, and safe.
Warco was founded with a vision to be the definitive U.S. source for transformer bushings and insulation components — parts that utilities and OEMs can rely on without question. That focus has not changed in over 50 years.
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Our products,
your reliable grid.
1.2 – 5 KV Distribution Bushings
Internal and external clamp configurations for standard service voltages.
1.2 – 5 KV High Current Bushings
Rated 600A to 2000A for high-load transformer and heavy industrial use.
8.7 – 34.5 KV High Voltage Bushings
Oil-filled, flanged, draw lead, and extended-creep utility substation styles.
5 – 46 KV Power Class Bushings
Heavy-duty power transformer bushings with BIL ratings to 250 KV.
Benefits of Warco
Precision manufacturing, strict quality controls, and fast lead times make Warco the supplier utilities depend on.
Our approach2-week catalog lead time
Standard catalog items ship within two weeks of order — maintained through careful raw material inventory management across the full product line.
USA manufacturing, start to finish
Every component is produced at our Marthasville, Missouri facility. No offshore manufacturing, no third-party assembly.
Operator-level quality accountability
Each technician owns the quality of their own work. This accountability model reduces defects at the source rather than relying on end-of-line inspection alone.
Our commitment to quality ensures power never stops.
Our approachWe are proud to power the grid — making real impact for utilities and communities.
Covering 1.2 KV through 46 KV in stock configurations ready to ship.
Continuous U.S. manufacturing since 1971, serving utilities and OEMs.
Single-site manufacturing in Marthasville, MO on 15 acres.
Full voltage range from distribution through power transformer class.
Who relies on Warco.
Investor-Owned Utilities
Electric Cooperatives
Transformer OEMs
Industrial MRO Buyers
Join the transformer
component supply chain
with Warco.
Discover reliable components that reduce risk and lead times. Take the first step today.
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Or call us directly: (636) 433-2212