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Henkel Adhesive Technologies

Henkel Adhesive Technologies



First generation, blue, medium-strength threadlocker (Military Spec)

One of the original blue, low viscosity, medium-strength threadlocker formulations from the 1950s. Designed for locking and sealing fine threaded nuts, bolts and studs in legacy applications where compliance to Mil-S-22473E Grade C 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 C, 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 C is required, choose LOCTITE® Grade C (84). This blue, low viscosity, medium-strength anaerobic curing adhesive cures in the absence of air and presence of metal. It also fluoresces under UV light – great for quality control.

Agency approvals / certificates / specifications:

ASTM D5363,MIL-S-22473E for existing designs



Cure type:

Anaerobic cure

Key characteristics:

No mix,Strength: medium strength,Viscosity: medium viscosity

Number of components:

1 part

Physical form:


Specific gravity, @ 25.0 °C:


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