Royco® 46

Product Description: A synthetic based, lithium stearate thickened semi fluid grease for automatic weapons. Modern additive technology provides corrosion, oxidation, rust inhibition and anti-wear performance.

Specification: MIL – L – 46000

NATO Specification: O-158

Joint Service Designation: N/A

MIL-SPEC Scope: This specification covers a semi-fluid lubricant for automatic weapons operating within a temperature range of -54 to +127 ⁰C (-65 to +260 ⁰F). The lubricant is identified by Military Symbol LSA and NATO Code Number O-158.

Shelf Life:

  • US Military 2 Years
  • Commercial 3 Years
  • NATO 2 Years

Tariff Code: 3403.99.0000

Material: Royco® Synthetic Ester Based Grease
Acrylonitrile Poor to Good
Acrylonitrile-butadiene rubber (Perbunan®) Fair to Good
Butyl rubber Poor to Fair
Flurocarbon (Viton®) Very Good
Methacrylate Poor to Fair
Natural rubber/latex Poor
Poly (ethylene) Good
Polyamine (Nylon) Poor
Polychloroprene (Neoprene® ) Poor
Polyester Poor to Fair
PTFE (Teflon® ) Very Good
Polyvinyl chloride (PVC) Poor
Silicone Poor to Fair
Styrene-butadiene or styene butadiene rubber (SBR) or Buna S Poor


National Stock Number Grade Amount Container
9150-00-935-6597 2 fl oz. Bottle
9150-00-889-3522 4 fl oz. Bottle
9150-00687-4241 1 quator Can
9150-00-753-4686 1 gal. Can

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