M1 Garand Bolt Springfield 6528287-SA Heat Lot# Z-3-A 5.8 Mil RangeM1 Garand Bolt Springfield 6528287-SA Heat Lot Z-3-A. Bolt is stripped and has excellent original finish with almost no signs of use. Excellent condition post War Bolt, appropriate for post WWII rifles in the 5.8 mil serial number range and later. One pictured available. Click on image for larger view of ACTUAL bolt available.