METAL FINISHING SINCE 1942

 Products waiting to be coated

  Product processing barrels and racks

The Black Oxide finish is an actual penetration into the surface of the metal being treated. There is no dimensional change in the size of the piece nor is there any reduction in the hardness of heat treated parts. Nickel Pentrate converts the surface to the Black Oxide finish without altering any of the original physical properties of the product.

Because the Black Oxide is an integral part of the metal surface, it cannot chip, crack peel, craze or rub off.

Pentrate Metal Processing, Inc. also provide Zinc Phosphate coating and Passivation of stainless steel.

Two production shifts per day provide an excellent and speedy turnover.

The shipping and receiving departments are open from 6:30 AM to 6:30 PM for your convenience.

Some of the products we process:

  • Springs
  • Stampings
  • Fasteners
  • Nuts
  • Bolts
  • Washers,
  • Machining tools
  • Hinges
  • Tubing
  • Buckles
  • Firearms, etc.

Permits issued by US-EPA, CAL-EPA, LAPD, LAFD, US-ATF, SCAQM, CIty of LA- Bureau of Sanitation & the State Board of Equalization.


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