How much can this screw hold?
Pull-apart strength for the screw itself. The thread it goes into is often the weaker part, so treat this as an upper limit, not a promise.
Screw size
Material grade
Safe working load
about 805 N (82.0 kg)
The screw itself finally breaks at roughly 4024 N (410 kg) in a straight pull. The figure above applies a safety factor of five, which is normal for anything not carefully engineered.
Read this before you rely on a number
- Threads in aluminium or plastic usually fail long before the screw does.
- Shear (sideways) loads are roughly 60% of the pull figure.
- Anything shock loaded, vibrating, or lifting people needs a proper engineering calculation, not a web tool.
- Never use these figures for overhead rigging, climbing or structural work.