4PIN Pipe-Thread Conduit Entry, 1 Normally Open / 1 Normally Closed (1 NO / 1 NC) Dual-Break Contacts, Heavy-Duty Top Push-Rod Actuator, Oil-Tight Limit Switch Module, Series D Mechanical Profile, -18°C to +110°C Industrial Operational Window | Upgraded top-plunger type linear limit switch manufactured by Allen-Bradley utilizing a hardened stainless-steel structural operating pin and a Series D mechanical carrier casing, optimized to execute rapid in-line mechanical safety breaks across manufacturing tool decks | Industry Exact Equivalents: Allen-Bradley 802T-B, Rockwell Automation 802T-B Series D, A-B 802T-B-D | Industry Functional Cross-References: Square D 9007C52B2, Honeywell LSB1A, Eaton E50BR1 | Military Specification National Stock Number (NSN): 5930-01-384-2922 [1, 2]