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Henkel Adhesive Technologies

Henkel Adhesive Technologies



First gen, green, high strength, wicking-grade threadlocker (Military Spec)

Original high strength and low viscosity, wicking-grade threadlocker formulation from the 1950s. Designed for locking and sealing fine threaded nuts, bolts and studs in legacy applications where compliance to Mil-S-22473E Grade AA is required.

All marks used are trademarks and/or registered trademarks of Henkel and its affiliates in the US, Germany, and elsewhere.

Part no. (SKU/IDH)

LOCTITE® GRADE AA, 50 ml Bottle



When you need to lock and seal fine threaded nuts, bolts and studs in legacy applications where certification to Mil-S-22473E Grade AA is required, choose LOCTITE® Grade AA (89). This green, high viscosity, high-strength anaerobic curing adhesive cures in the absence of air and presence of metal. It also fluoresces under UV light – great for quality control. The low viscosity of Grade AA also makes it ideal for sealing porosities in welds and metal castings. It is able to penetrate porosities and cracks by capillary action, filling voids as large as 0.127 mm (0.005").





Cure type:

Anaerobic cure

Key characteristics:

Mix: no mix required,Strength: high strength,Viscosity: low viscosity

Physical form:


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