Precision Technology
Supplies Ltd

Technical Data

Carriage bolts (Din 603)

Metric range

Diameter	Head diameter	Head height	Square across flats	Square depth
M5	13.55	3.3	5.48	4.1
M6	16.55	3.88	6.48	4.6
M8	20.65	4.88	8.58	5.6
M10	24.65	5.38	10.58	6.6
M12	30.65	6.95	12.7	8.75
M16	38.8	8.95	16.7	12.9

All dimensions are in MM

Unified (American) range

Diameter	Head diameter	Head height	Square across flats	Square depth
10un	.469	.144	.199	.125
1/4	.594	.145	.260	.156
5/16	.719	.176	.324	.187
3/8	.844	.208	.388	.219
1/2	1.094	.270	.515	.281

All dimensions are max in Inches

If the information you require is not in the above tables please us and we will be happy to send it to you.

This information is for guidance only no liability can result from its use