Mike - Rear fender bolts for your 1953 3100 are 5/16"-18 x 5/8" long (originally clutch head driver bolts) like these from Classic Parts.

PS - I've moved your thread to the Paint & Body Shop as that's where the topic belongs. wink


~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)