Alma Bolt Company & Prime Fasteners 1-800-526-2200

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Carriage and Shaker Screen Bolts

Carriage Bolts

Designed for wood-to-wood or wood-to-metal applications, these self-anchoring screws have a square neck to resist turning. Available in Grades 2 and 5 in diameters from 1/4" to 3/4".

Group codes represented: CB2, CB5
Part# examples: 10U62CB2, 62U150CB5

Basic Bolt Diameter
E
A
H
O
P
Body Diameter
Head Diameter
Head Height
Square Width
Square Depth
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
10
0.190 0.199 0.182 0.469 0.438 0.114 0.094 0.199 0.185 0.125 0.094
 
1/4
0.250 0.260 0.237 0.594 0.563 0.145 0.125 0.260 0.245 0.156 0.125
 
5/16
0.313 0.324 0.298 0.719 0.688 0.176 0.156 0.324 0.307 0.187 0.156
 
3/8
0.375 0.388 0.360 0.844 0.782 0.208 0.188 0.388 0.368 0.219 0.188
 
7/16
0.438 0.452 0.421 0.969 0.907 0.239 0.219 0.452 0.463 0.250 0.219
 
1/2
0.500 0.515 0.483 1.094 1.320 0.270 0.250 0.515 0.492 0.281 0.250
 
5/8
0.625 0.642 0.605 1.344 1.272 0.344 0.313 0.642 0.616 0.344 0.313
 
3/4
0.750 0.768 0.729 1.594 1.469 0.406 0.375 0.768 0.741 0.406 0.375

Shaker Screen Bolts

Dimensionally the same as carriage bolts, these bolts are always fully threaded. Available in Grade 5 and Grade 8 diameters 1/2", 5/8" and 3/4" only.

Bolt Dia.
E
A
H
O
P
Q
R
Body Diameter
Head Diameter
Head Height
Square Width
Square Depth
Corner Radius on Square
Rillet Radius
Max
Min
Max
Min
Max
Min
Max
Min
Min
Max
Min
Max
 1/2 0.515 0.483 1.094 1.032 0.27 0.25 0.515 0.492 0.281 0.25 0.047 0.031
 5/8 0.642 0.605 1.344 1.219 0.344 0.313 0.642 0.616 0.344 0.313 0.078 0.062
 3/4 0.768 0.729 1.594 1.469 0.406 0.375 0.768 0.741 0.406 0.375
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