KOVERALL DIMENSIONS: LENGTH 6.239 INCHES MIN TO 6.289 INCHES MAX; WIDTH 2.953 INCHES MIN TO 2.983 INCHES MAX; HEIGHT 1.557 INCHES MIN TO 1.587 INCHES MAX; MATERIAL: ALLOY STEEL MIL-S-869; CLASS A; TYPE 1; NITRALLOY 135 M; SHOE HAS NITRIDE HARDENED AREAS: HEAT TREATED AREAS MAGNETIC PARTICAL INSPECTED PER MIL-I-6868; SHOE HAS 12 MOUNTING HOLES; SURFACE TREATMENT: PROTECTIVE COATING DOD-P-16232 TYPE M; CLASS 1 ALL OVER; FINISH COAT: SOLID-FILM LUBRICANT MIL-L-46010