SEMS Screw: External Tooth, M3x0.50 Thread Size, 20 mm Lg, Stainless Steel, Passivated
The SEMS Screw: External Tooth (MPN 1-MPE-3-20) is a machine screw with an integrated external tooth lock washer, featuring an M3x0.50 thread size, 20 mm length, stainless steel construction, passivated finish, pan…
SKU 3G-OTH-528652
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Product Description
The SEMS Screw: External Tooth (MPN 1-MPE-3-20) is a machine screw with an integrated external tooth lock washer, featuring an M3x0.50 thread size, 20 mm length, stainless steel construction, passivated finish, pan head, and #1 drive size, supplied in a 25-piece pack.
Frequently Asked Questions
What is a SEMS screw with external tooth lock washer used for?
A SEMS screw with an external tooth lock washer is used to fasten components in machinery, electrical panels, and industrial assemblies where vibration resistance is critical. The integrated washer prevents loosening, making it ideal for applications in automation, HVAC, and material handling equipment.
What are the specifications of the SEMS screw M3x0.50 20 mm?
This SEMS screw has an M3x0.50 thread size, 20 mm length, stainless steel construction with a passivated finish, pan head, and #1 drive size. It includes an integrated external tooth lock washer and is supplied in a 25-piece pack (MPN 1-MPE-3-20).
Where to buy SEMS screws in worldwide?
3G Electric supplies SEMS screws worldwide, handling full logistics and customs clearance for global delivery. As a sourcing specialist across 14 industrial departments, we provide genuine SEMS fasteners like the M3x0.50 20 mm external tooth screw to procurement teams and plant engineers internationally.
How to select the correct SEMS screw size for an application?
To select the correct SEMS screw, match the thread size (e.g., M3x0.50) and length (e.g., 20 mm) to the mating hole depth and material thickness. Consider the drive size (#1) and head type (pan) for tool access. The integrated external tooth washer provides locking action; verify stainless steel passivated finish suits the environment.
SEMS Products
3G Electric supplies SEMS machine screws with external tooth lock washers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.









