#8 Mechanical Zinc Finish Medium Split Lock Washer / HOLE DIAMETER: 0.167 INCHES MINIMUM AND 0.174 INCHES MAXIMUM OUTSIDE DIAMETER: 0.293 INCHES MAXIMUM MATERIAL THICKNESS: 0.040 INCHES MINIMUM END ITEM IDENTIFICATION: TOW TRACTOR, AIRCRAFT PART NAME ASSIGNED BY CONTROLLING AGENCY: NAVY SPECIAL PROJECT MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL STYLE DESIGNATOR: 108 SPLIT HELICAL-RIGHT HAND