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Carriage bolts (also descriptively called round head square neck bolts) generally feature a broad, shallow round head and threading along part of the carriage bolt shank, and is inserted into pre-drilled holes. The square under the head keeps the carriage bolt from turning as the nut is tightened.

Carriage bolts are commonly used in wood and are used to fasten wood parts, or wood and metal parts, together. Carriage bolts are also successful with sheet metal applications, where a standard sized neck may create an obstruction.
A307 GRADE A CARRIAGE BOLT, ZINC YELLOW CR+6 (INCH)
Unit of Measure
1 2 

Item #

Item Name

Package Quantity

Web Price

25C75BCG2D N/A 1/4-20 X 3/4 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 3600 $660.84
25C100BCG2D N/A 1/4-20 X 1 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 3000 $419.11
25C150BCG2D N/A 1/4-20 X 1 1/2 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 1800 $274.23
25C175BCG2D N/A 1/4-20 X 1 3/4 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 1800 QUOTE
25C200BCG2D N/A 1/4-20 X 2 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 1400 $230.34
25C250BCG2D N/A 1/4-20 X 2 1/2 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 1100 $277.10
25C400BCG2D N/A 1/4-20 X 4 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 500 $238.09
31C75BCG2D N/A 5/16-18 X 3/4 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 2400 $410.63
31C100BCG2D N/A 5/16-18 X 1 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 1600 $319.12
31C125BCG2D N/A 5/16-18 X 1 1/4 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 1400 QUOTE
31C150BCG2D N/A 5/16-18 X 1 1/2 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 1100 $193.99
31C200BCG2D N/A 5/16-18 X 2 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 850 $183.99
31C250BCG2D N/A 5/16-18 X 2 1/2 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 650 $205.80
31C275BCG2D N/A 5/16-18 X 2 3/4 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 600 $164.96
31C400BCG2D N/A 5/16-18 X 4 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 425 $237.98
37C100BCG2D N/A 3/8-16 X 1 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 1400 $509.46
37C125BCG2D N/A 3/8-16 X 1 1/4 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 1000 $379.58
37C150BCG2D N/A 3/8-16 X 1 1/2 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 825 $203.67
37C200BCG2D N/A 3/8-16 X 2 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 700 $356.76
37C250BCG2D N/A 3/8-16 X 2 1/2 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 500 $335.42
37C300BCG2D N/A 3/8-16 X 3 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 400 $258.46
37C350BCG2D N/A 3/8-16 X 3 1/2 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 325 $260.40
37C400BCG2D N/A 3/8-16 X 4 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 300 $278.67
37C450BCG2D N/A 3/8-16 X 4 1/2 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 275 $306.18
37C500BCG2D N/A 3/8-16 X 5 CARRIAGE BOLT A307 GRADE A YELLOW ZINC N/A 250 $276.83
Unit of Measure
1 2