![]() ![]() ![]() Their ideal use is with materials with lower ultimate shear strength, which allows for maximum pull-out strength and integrity. Extra Heavy Duty: Supplying greater pull-out strength, longer life, and stability, Extra Heavy Duty inserts have greater external thread area and an increased wall thickness.These inserts are ideal for applications where the mating stud or bolt will be removed regularly. ![]() Heavy Duty: As the standard key locking insert suitable for most applications, Heavy Duty inserts are general purpose and have a thick and heavy-duty thread wall.Thin Wall: With a smaller external thread size than the more standard heavy duty inserts, Thin Wall inserts are perfect for tight spaces where less pull-out strength is required.Below are the four main styles of key locking inserts. They are easy to install with a standard drill or tap, which also makes them easy to removed without damaging the parent material. Offering a positive mechanical lock to prevent rotation caused by vibration or torsion, these inserts are often known by the shorthand “keysert,” but Keysert® is actually the registered trademark of Alcoa Fastening Systems. Key locking inserts are solid, single-piece inserts that are threaded both internally and externally. Whether you’re fixing an oversized or misplaced hole or need to complete a repair on original equipment (OEM), key locking inserts are the ideal fastener for repairing damaged threads. ![]()
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