Industrial 57K6027 Turret Gunners Seat Restraint Kit With Hooks

57K6027 Turret Gunners Seat Restraint Kit (NSN 2540-01-571-8576) is a Humvee turret seat belt kit designed to secure the gunner during vehicle movement and turret operation. The three-component assembly includes a seat assembly gunner restraint, a lower retractor kit, and a harness assembly, delivering the essential hardware to restrain the gunner in the turret seat. In U.S. military catalogs, 57K6027 is listed as a Seat Belt Parts Kit with the associated NSN 2540-01-571-8576, and the supply items are enumerated as 2540-01-550-7246 (seat assembly gunner restraint), 2540-01-542-7412 (lower retractor kit), and 2540-01-542-7412 (harness assembly). Commercial listings from SECO Parts, AeroBase Group, and WBParts corroborate the part number 57K6027 and its role as a Humvee turret gunners' restraint kit (2540-01-571-8576). This kit is used as a direct replacement/maintenance part to equip Humvee turret gunners with a dedicated restraint system for safer turret operation in the field. Because it is listed against a standardized NSN, it is suitable for Humvee service life-cycle logistics and procurement workflows.