metalmech Engineering manufactures Lock Nuts Made of Brass. metal Engineering & Treatment Co is an ISO 9001:2000 certified company. The Company also manufactures various types of brass cable glands, brass fasteners, brass inserts and other brass components. The Lock Nuts Made of Brass is used in fastening glands to the gland plate. The Lock Nuts Made of Brass is used in dry, low humidity conditions. The Lock Nuts Made of Brass is available in metric, imperial, NPT, BSPT, BSP and PG threads.