18 1 4 3 8 July 8, 2019 16 32 64 128 18 gauge 1 4 crown staple 3 8 length 18 gauge 1 4 crown staples 3 8 1 4 18 npt w 3 8 in barb 1 4 18 npt to 3 8 barb 18 1 8 minus 3 4 18 1 8 plus 3 4 1 4 18 npt fitting with a 3 8 barb 5 16 18 x 1 3 4 grade 8 bolt 5 8 18 x 1 3 4 5 16 18 x 1 3 4 grade 8 1 3 4 and 8 24 18