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Continue to ChatKP2-FSB-12.7-FR-1 - 4NC/2NC, Brass, Bolt length 12.7mm, Front Entry, Castell KP Bolt Interlock With Safety Switch https://www.pneutrol.com/industrialspares/product/kp2-fsb-12-7-fr-1-4nc-2nc-brass-bolt-length-12-7mm-front-entry-castell-kp-bolt-interlock-with-safety-switch/