Lock Washer, Bolt M16, A2 Stainless, PK10/ HOLE DIAMETER: 17.0 MILLIMETERS NOMINAL OUTSIDE DIAMETER: 26.0 MILLIMETERS NOMINAL MATERIAL THICKNESS: 1.2 MILLIMETERS MINIMUM AND 2.4 MILLIMETERS MAXIMUM END ITEM IDENTIFICATION: MRAP - UNIQUE NSN - USED ON 2 MRAP VARIANTS; MRAP BUFFALO MK2A2 PART NAME ASSIGNED BY CONTROLLING AGENCY: WASHER,EXTERNAL TEETH MATERIAL: STEEL CORROSION RESISTING OVERALL STYLE DESIGNATOR: 100 FLAT EXTERNAL TEETH