Locking Nuts

Any nut can be manufactured with a locking feature. The most common locking nuts include Keps nuts, Nylon Insert Lock nuts and All Metal locknuts.


Keps Nuts

Keps Nuts

Keps nuts, also known as star nuts, have a washer integrated on one side which provides locking tension when tightened. Washers can be internal or external tooth lockwashers, split lockwashers or a variety of specially shaped washers, as needed. The most common version of a keps nut is the external tooth lockwasher.
Metal Locking Nuts

Metal Locking Nuts

All Metal locknuts rely on an internal "pinch" or "crimp" in their threading to provide a locking mechanism. All metal locking features are most commonly seen in flanged nuts.
Nylon Insert Locknuts

Nylon Insert Locknuts

Nylon insert locknuts are produced by a number of manufacturers and there can be small variations in height and color of the insert depending on the manufacturer. Specification information provided is based on ESNA's specification. For high temperature applications please contact your sales professional at Apex Fasteners.
Palnut Lock Nuts

Palnut Lock Nuts

Serrated Flange Locknuts

Serrated Flange Locknuts


APEX FASTENERS, Inc 15858 Business Center Drive Irwindale, CA 91706 USA
APEX Fasteners supplies standard and custom screws, nut retainers, shoulder screws, plastites and taptites, all types of rivets, spring steel fasteners and special stampings, sems screws in standard, fractional or metric to electronics, aviation and other OEM industries worldwide. ApexFasteners.com custom manufactures screw machine components for electronic enclosure hardware as well as cold forming and cold headed specials for assembly and production requirements.
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