M3 X 20mm Pan Phillips SEMS Screw SS304 (Dia. 3mm, Length 20mm)

Description

Diameter: 3mm 
Bolt Length: 20mm 
Pitch: 0.5mm
Material: SS 304
Bolt Head Style: Pan Head
Washers included: Plain & Spring

Pan Phillips SEMS Screw – SS304 Stainless Steel is a pre-assembled fastening solution featuring a pan head Phillips drive with a permanently attached washer (SEMS design). Made from SS304 stainless steel, it provides excellent corrosion resistance, durability, and long service life even in humid, marine, or outdoor environments.

Unlike standard screws where the washer must be added separately, SEMS screws come with a captive washer already assembled, preventing washer loss and speeding up installation. The washer also distributes clamping force evenly, protecting softer materials and reducing the chance of loosening due to vibration.

Typical Applications

Pan Phillips SEMS screws are commonly used in electronics assemblies, electrical panels, appliances, automotive components, machinery housings, sheet metal assemblies, and control cabinets. They are especially useful in production lines and high-volume assembly environments where faster installation and consistent fastening are required.