Shoulder Bolts
Shop AFT's large selection of shoulder bolts in both alloy steel and stainless steel options. Metric shoulder bolts range from M6 to M24 shoulder diameters and inch shoulder bolts range from 1/8" up to 1-1/4".
How to Measure Shoulder Bolts
Inch Shoulder Bolts:
1. List shoulder diameter, then
2. List thread diameter/size, then
3. List shoulder length
Example: 1/4"-10-24 x 7/8" = a shoulder bolt with a 1/4" diameter shoulder, #10-24 thread size and 7/8" shoulder length
Thread size is one standard size smaller than the shoulder diameter and doesn't need to be specified, except for:
- A bolt with a 1/2" diameter shoulder has a 3/8"-16 thread.
- A 5/8" diameter shoulder has a 1/2"-13 thread.
Metric Shoulder Bolts:
1. List shoulder diameter, then
2. List thread size, then
3. List shoulder length
Example: M6-M5 x 20 mm = a shoulder bolt with a 6 mm shoulder diameter, a 5 mm thread diameter and 20 mm shoulder length