annalex bute limited, fastener and fixing distribution, proudly serving the east midlands for over 25 years email us at

Our machine screw range really is extensive, covering as it does all of the variations in head form, pan, csk, cheese and raised csk, in both posi drive and slotted.

Sizes start from M1.6 dia. and lengths up to the maximum manufactured relative to the diameter. An example of this would be M4 x 80 posi pan zinc plated.

We can also supply SEMS machine screws with a variety of options of pre-assembled washers. Please contact our sales dept. with your specific requirements.

All of our metric range is available in stainless steel, grades A2 and A4.

The standards our screws are manufactured to are listed below.
- Posi Pan Metric (Din 7985)
- Slot Pan Metric (Din 85)
- Posi Csk Metric (Din 965)
- Slot Csk Metric (Din963), UNC/UNF (BS1981), BSW/BSF (BS450), BA (BS57)
- Slot Cheese Metric (Din84), BA (BS57)