MIDWEST FASTENER CORP 66363 Knife Thread Insert #8-32 5/16 in L hardware

Knife Thread Insert #8-32

This knife thread insert provides a #8-32 internal thread size and a 5/16 inch length for repairing stripped threads in softer materials. It suits maintenance technicians and hobbyists who need reliable thread reinforcement in aluminium, plastic or wood. The sharp external knife threads cut into the host material during installation for a secure mechanical lock. Buyers requiring metric threads or larger diameters will need a different insert.

Capacity and headroom

The #8-32 internal thread accepts standard coarse-pitch machine screws, while the 5/16 inch length offers engagement depth for typical sheet-metal or plastic bosses. Load capacity depends on the host material strength rather than the insert alone. In very thin or brittle substrates the knife threads may not achieve full purchase, so a longer insert or alternative fastening method becomes necessary.

Proposition 65 notice

California Proposition 65 warnings indicate the insert contains chemicals known to the state to cause cancer and reproductive harm. No additional accessories, lubricants or installation tools are bundled with the hardware. The notice does not change the mechanical function but requires safe handling practices such as washing hands after use. Users in other jurisdictions should still follow general shop safety.