1/2″ to 4″ Heavy Duty Industrial True Tight Grounding Locknuts (AHLN Series)
Solid Steel Precision Machined from Solid Bar Stock & Made in the USA

Utilizes the same locknut as our AH Hubs and provides numerous grounding options.

Why Deal with Stamped Cast Locknuts that Warp, Strip, Crack, or Worse Yet,  Fail?

Consider our NEXT Generation of Locknuts…AMFICO’S AH True Tight Steel Grounding Locknuts,
Guaranteed to Grip Tight, Thread Right & Never Vibrate Loose!
Unique Diamond-Cut Knurl Facing Will Fully Bond to All Metal Enclosures & Never Damage  Non-Metallic Boxes.
Save Time and Improve Your Installation

Flat Hex Service Accommodates Standard Channel Lock without Breaking Knuckles
Furnished with 3 Threaded Holes to Move Screw, Strap, or Lug
Even has a Machined Notch to Assist in the Your  “Bump Lock” in Place
Fully Reusable, with Precision Machined Solid Steel Threads

Full Torque without Fear of Warping or Cracking, Cannot Vibrate Loose,
Use as an Alternative Grounding Solution for Threaded Rigid Conduit.

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American Fittings Grounding Locknut Heavy Duty Steel USA

AHLN GL with Ground Lug

AHLN GS with Ground Strap

You Know It’s Superior Because It’s AMERICAN

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

Cat Numbers & Dimensions

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Material Construction:  Alloy Steel, Zinc Plated with Chromate Finish
Solid Steel Construction Fully Precision Machined
Galvanized Plating Option Available


Diamond Cut Facing for Full Bonding
Cannot Vibrate Loose
Will Not Damage Non Metallic Enclosures
Notched Indents to Assist in “Bump & Lock”
Flat Hex Surfaces Precision Cut Threads for EZ Torque


Certified Made in the USA

UL Listed to 514B
NEMA Standard FB1
Federal Standard A-A-50553
UL Standards: 514B, 467
CSA Standard: C22.2 No. 18F
RoHS Compliant
REACH Compliant
CA Prop 65 Compliant
UNSPSC 39131311

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