Allied Electronics Corporation is the manufacturer of Proactive Metal Caps. Allied Electronics Corporation is an ISO 9001: 2000 certified company. The Proactive Metal Caps, MS 25042 are internally threaded. Metal dust caps are used to protect MS 3100, MS 3101 and MS 3102 style connectors. These are made of aluminium alloy and supplied with sash chain. The Proactive Metal Caps are available in sizes: 10SL, 12S, 14S, 16S, 16, 18, 20, 22, 24, 28, 32, 36, 40 and 44.