Carriage Bolts
Jiangsu Zhenya Special Screw Co.,Ltd is one of the leading China carriage bolts manufacturers and suppliers,Website:, as a professional company, our productive factory is able to produce CE certification carriage bolts at both high quality and low price. Welcome to buy discount and cheap, or wholesale products from us.
Carriage bolts (round head with square neck) are commonly used in wood connections. The square neck under the round head will seat into the hole in the wood to prevent the head from turning. Because they are used with wood, carriage bolts are rarely high strength
Carriage Dimensions
D
C
H
P
F
Bolt Diameater
Body Diameter
Head Diameter
Head Height
Square Width
Square Depth
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
3/8
0.388
0.360
0.844
0.782
0.208
0.188
0.388
0.368
0.219
0.188
1/2
0.515
0.483
1.094
1.032
0.270
0.250
0.515
0.492
0.281
0.250
5/8
0.642
0.605
1.344
1.219
0.344
0.313
0.642
0.616
0.344
0.313
3/4
0.768
0.729
1.594
1.469
0.406
0.375
0.768
0.741
0.406
0.375
7/8
0.895
0.852
1.844
1.719
0.469
0.438
0.895
0.865
0.469
0.438
1
1.022
0.976
2.094
1.969
0.531
0.500
1.022
0.990
0.531
0.500
1-1/4*
1.277
2.850
0.531
0.500
1.250
0.625
Dimensions per ASME B18.5 1990 (R 1998) cover diameters up to 1".Bolts over 1" use custom head dimensions
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