ASME B18.2.1 Grade A Hex Bolt Size: 1/4 × 1 in Thread: UNC 20 TPI Thread length: 3/4 in Width across flats: 7/16 in Head height: 3/16 in Material: Carbon Steel Finish: Hot Dip Galvanized Estimated mass: 8.78 g/pc
ASME B18.2.1 Grade A Hex Bolt Size: 1/4 × 1-1/4 in Thread: UNC 20 TPI Thread length: 3/4 in Width across flats: 7/16 in Head height: 3/16 in Material: Carbon Steel Finish: Hot Dip Galvanized Estimated mass: 10.359 g/pc
ASME B18.2.1 Grade A Hex Bolt Size: 1/4 × 1-1/2 in Thread: UNC 20 TPI Thread length: 3/4 in Width across flats: 7/16 in Head height: 3/16 in Material: Carbon Steel Finish: Hot Dip Galvanized Estimated mass: 11.937 g/pc
ASME B18.2.1 Grade A Hex Bolt Size: 1/4 × 1-3/4 in Thread: UNC 20 TPI Thread length: 3/4 in Width across flats: 7/16 in Head height: 3/16 in Material: Carbon Steel Finish: Hot Dip Galvanized Estimated mass: 13.516 g/pc
ASME B18.2.1 Grade A Hex Bolt Size: 1/4 × 2 in Thread: UNC 20 TPI Thread length: 3/4 in Width across flats: 7/16 in Head height: 3/16 in Material: Carbon Steel Finish: Hot Dip Galvanized Estimated mass: 15.095 g/pc
ASME B18.2.1 Grade A Hex Bolt Size: 1/4 × 2-1/2 in Thread: UNC 20 TPI Thread length: 3/4 in Width across flats: 7/16 in Head height: 3/16 in Material: Carbon Steel Finish: Hot Dip Galvanized Estimated mass: 18.252 g/pc
ASME B18.2.1 Grade A Hex Bolt Size: 1/4 × 3 in Thread: UNC 20 TPI Thread length: 3/4 in Width across flats: 7/16 in Head height: 3/16 in Material: Carbon Steel Finish: Hot Dip Galvanized Estimated mass: 21.409 g/pc
ASME B18.2.1 Grade A Hex Bolt Size: 1/4 × 3-1/2 in Thread: UNC 20 TPI Thread length: 3/4 in Width across flats: 7/16 in Head height: 3/16 in Material: Carbon Steel Finish: Hot Dip Galvanized Estimated mass: 24.567 g/pc
ASME B18.2.1 Grade A Hex Bolt Size: 1/4 × 4 in Thread: UNC 20 TPI Thread length: 3/4 in Width across flats: 7/16 in Head height: 3/16 in Material: Carbon Steel Finish: Hot Dip Galvanized Estimated mass: 27.724 g/pc
ASME B18.2.1 Grade A Hex Bolt Size: 1/4 × 4-1/2 in Thread: UNC 20 TPI Thread length: 3/4 in Width across flats: 7/16 in Head height: 3/16 in Material: Carbon Steel Finish: Hot Dip Galvanized Estimated mass: 30.881 g/pc
ASME B18.2.1 Grade A Hex Bolt Size: 1/4 × 5 in Thread: UNC 20 TPI Thread length: 3/4 in Width across flats: 7/16 in Head height: 3/16 in Material: Carbon Steel Finish: Hot Dip Galvanized Estimated mass: 34.038 g/pc
ASME B18.2.1 Grade A Hex Bolt Size: 1/4 × 6 in Thread: UNC 20 TPI Thread length: 3/4 in Width across flats: 7/16 in Head height: 3/16 in Material: Carbon Steel Finish: Hot Dip Galvanized Estimated mass: 40.353 g/pc
ASME B18.2.1 Grade A Hex Bolt Size: 1/4 × 7 in Thread: UNC 20 TPI Thread length: 1 in Width across flats: 7/16 in Head height: 3/16 in Material: Carbon Steel Finish: Hot Dip Galvanized Estimated mass: 46.284 g/pc
ASME B18.2.1 Grade A Hex Bolt Size: 1/4 × 8 in Thread: UNC 20 TPI Thread length: 1 in Width across flats: 7/16 in Head height: 3/16 in Material: Carbon Steel Finish: Hot Dip Galvanized Estimated mass: 52.598 g/pc
ASME B18.2.1 Grade A Hex Bolt Size: 1/4 × 10 in Thread: UNC 20 TPI Thread length: 1 in Width across flats: 7/16 in Head height: 3/16 in Material: Carbon Steel Finish: Hot Dip Galvanized Estimated mass: 65.227 g/pc
ASME B18.2.1 Grade A Hex Bolt Size: 1/4 × 12 in Thread: UNC 20 TPI Thread length: 1 in Width across flats: 7/16 in Head height: 3/16 in Material: Carbon Steel Finish: Hot Dip Galvanized Estimated mass: 77.856 g/pc
ASME B18.2.1 hex bolts are inch-series externally threaded fasteners supplied in the listed diameters, lengths, thread series, grades and finishes. Use the filters to select the exact catalog variant required for quotation or production.
ASME B18.2.1 selection guide
Confirm diameter, length, UNC or 8UN thread, Grade A or B, material and finish before ordering. Each product page contains the dimensional data and theoretical mass for that exact variant; final manufactured mass can vary within dimensional and coating tolerances.
