RS PRO M4 x 12mm Zinc Plated Steel Pan Head Sems Screw, Spring Washer

Sems units consisting of pan headed Pozidriv™ machine screws together with integral captive washers.

Bright zinc finish
Easier and quicker to install than separate screws and washers

Not surprisingly, thanks to high-quality and friendly installation SEMS Screws have their place in:

• Avionic communication systems


• Flight control systems


• Infra-red systems and cameras


• Naval & ground fire control systems


• Battery packs


• PCB (Printed Circuit Board) assembly


• Drone sub-assemblies


• Connector assembly

RS PRO is our family brand to go-to and brings you a wide range for high-quality and high-value products to support your project. Trusted by engineers all over the world, every part of every RS PRO product is always rigorously tested against demanding industry standards. We are only giving the RS PRO seal of approval if we are confident of their exceptional quality, which means you can be convinced too.

All these are coarse metric thread. The fine thread pitch would typically start at M8 diameter.

Thread pitch as follows.

M3 x 0.5mm pitch
M4 x 0.7mm pitch
M5 x 0.8mm pitch
M6 x 1.0mm pitch