Carriage bolts, also known as round cap square neck bolts, are designed to be used in wood and metal applications. The hot-dip galvanized coating provides excellent corrosion resistance, making them suitable for outdoor and marine environments. The square neck prevents the bolt from turning as the nut is tightened, making them ideal for use in applications where a secure connection is essential. These bolts are commonly used in construction, fencing, and deck building, where their strength and durability are essential. Whether you are looking for a reliable fastening solution for your next project or need to secure heavy-duty materials, carriage bolts are a versatile and reliable option.
Standard | No | USA | UK | Standard | No | USA | UK | ||||
Size | Dia | P | P | Size | Dia | P | P | ||||
UNC | UNF | BSW | BSF | UNC | UNF | BSW | BSF | ||||
4# | 2.84 | 40 | 48 | 1/2” | 12.7 | 13 | 20 | 12 | 18 | ||
5#(1/8) | 3.18 | 40 | 44 | 40 | 9/16” | 14.29 | 12 | 18 | 12 | 16 | |
6# | 3.51 | 32 | 40 | 5/8” | 15.88 | 11 | 18 | 11 | 14 | ||
8# | 4.17 | 32 | 36 | 3/4” | 19.05 | 10 | 16 | 10 | 12 | ||
10(3/16) | 4.83 | 24 | 32 | 24 | 32 | 7/8” | 22.23 | 9 | 14 | 9 | 11 |
1/4 | 6.35 | 20 | 28 | 20 | 26 | 1" | 25.4 | 8 | 12 | 8 | 10 |
5/16" | 7.94 | 18 | 24 | 18 | 22 | 1-1/8" | 28.58 | 7 | 12 | 7 | 9 |
3/8” | 9.53 | 16 | 24 | 16 | 22 | 1-1/4” | 31.75 | 7 | 12 | 7 | 9 |
7/16” | 11.11 | 14 | 20 | 14 | 20 | 1-1/2" | 38.1 | 6 | 12 | 6 | 8 |