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Bolt kit: 40 Pce - 20 x 3/8\" + 20 Cage Nuts
Bolt kit: 40 Pce - 20 x 3/8" + 20 Cage Nuts.

Bolt kit: 40 Pce - 20 x 3/8" + 20 Cage Nuts.

Found on SO SO MANY GM USA pre metric (aka around mid 80's) GM body construction.

Larger washer headed  Bolts & Cage nuts were used on secure heavier areas like hood hinges, various frame parts like x members, lower inner fender and fender lower mounts.

Again its a bolt kit that GM car restorers will find more then usefull in larger body rebuilds.

20 bolts  3/8 x 16 x 1.5 inch

20 Cage nuts.  3/8 x 16