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Continue to ChatKSP-FSB-12.7-4 - Brass, Retracted Bolt Length 12.7mm, FS Type, Castell KSP Spring Bolt Interlock https://www.pneutrol.com/industrialspares/product/ksp-fsb-12-7-4-brass-retracted-bolt-length-12-7mm-fs-type-castell-ksp-spring-bolt-interlock/