bisco industries Blog

What is a Threaded Insert?

A threaded insert is a threaded metal cylinder that is inserted into an existing hole to provide a threaded pathway for a fastener such as a screw or bolt.  Also known as threaded bushings, threaded inserts are used to repair damaged threads and improve the thread strength of the parent material. Threaded inserts are used in metal, plastic and wood and typically require special tools for installation.

Wire Formed Threaded Inserts vs. Solid Threaded Inserts

Threaded inserts are fabricated in two primary ways. In the wire forming method threaded inserts are made by tightly winding wire to form a coil. The wire coil mimics threads and results in a cost effective and reliable threaded insert. Wire formed threaded inserts are often referred to as Helicoil inserts. The other method of manufacturing inserts is by machining solid metal bars. Threaded inserts made in this way are known as solid inserts and have a higher pull-out and torque-out strength than wire formed threaded inserts.

Threaded Insert Configurations

Threaded inserts are available in numerous materials and configurations depending on the application requirements. Major options include tanged inserts, tangless inserts, externally threaded inserts, and self-locking inserts.

Threaded Insert Manufacturers Include:

Learn More About Threaded Inserts

To learn more about threaded inserts check out these helpful resources from KATO and Acme Industrial. Still have questions? Contact bisco’s product support team. Looking for pricing and availability? Visit to view online pricing and request special quotes.

Manufacturer Profile: Acme Industrial

Founded in 1914, Acme Industrial began as a manufacturer of shaft seals, bushings, and pins.  In the following decades Acme’s manufacturing capabilities continued to expand and in 1988 Acme began manufacturing keylocking inserts.  Today, Acme is one of the leading manufactures of threaded inserts and keylocking inserts in the world. Acme produces a wide range of inserts that provide economical equivalents to manufacturers like Keensert (Alcoa) and Helicoil. In addition, many of Acme Industrial’s keylocking inserts are manufactured to military (Mil, MS) and aerospace (NAS, AS, AN) standards.

Top Selling Acme Industrial to Mil-Spec Equivalents

Acme inserts are machined from solid steel bars providing superior strength compared to coil inserts. Keylocking inserts also help reduce Foreign Object Debris (FOD) by not utilizing tangs for installation.


bisco: Your Authorized Source for Acme Inserts

bisco industries is proud to be an authorized Acme Industrial distributor.  We offer hundreds of Acme inserts in stock with cross equivalent information to mil-spec, Keensert, and Helicoil inserts. To find pricing, availability, and specification information on the entire catalog of Acme inserts visit bisco’s Acme Industrial microsite.

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