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This is a pack of 20 piece PACK of useful new GM style BLUNT END / FLAT END bolts and U nuts 5/16" x 1" inch long... for use on many GM Vehicles..
This is AF thread. not post 1982+ metric.
Often found on inner fenders or coupling a bracket to sheet metal that is already holed.
Packs may be pointed nuts or flat ended but all look the same from the hex head end.
This is primarily for pre-82 AF thread .. not latter metric.
Size of Bolt:
Not specific to any one job type ... but ideal for resto work.. often used on brackets & inner mudguard fastening and other medium support area's.