1/2″ to 4″ Heavy Duty Industrial LOCKnuts (HDI Series)
Solid Steel Precision Machined & Made in the USA

Why deal with stamped locknuts that warp, strip, crack, or worse yet fail?

Consider the NEXT Generation of locknuts…AMFICO’S HDI Series Steel LOCKnut,
Guaranteed to Grip Tight, Thread Right & Never Vibrate Loose!
Unique diamond-cut knurl facing will bond to all metal enclosures & never damage non-metallic boxes.
Fully Reuseable

Will EXCEED Your EXPECTATION NOT Your Budget.  A True Cost-Effective Solution. 

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You know its superior because it’s AMERICAN.

End your locknut frustration by installing with our HDI Series Steel LOCKnuts. This LOCKnutt will end all your frustration with warped locknuts, cracked locknuts, and locknuts that simply spin & do not lock.  Our steel LOCKnut threads easily and even has a notched area to make your bump lock easy.

All HDI Locknuts are made in our factory in New Jersey. They start from alloy bar stock and precision machined to provide a lifetime of service. They will lock TIGHT & RIGHT every time. Never worry about vibration, they are test proven in major transit, bridge, and airport projects. 

AMFICO HDI Series Industrial Grade Solid Steel Locknuts Made in the USA

Cat Numbers & Dimensions