SEMS Screw: Internal Tooth, M2.5x0.45 Thread Size, 4 mm Lg, Stainless Steel
The SEMS Screw: Internal Tooth (SKU 849C17) is a machine screw with an internal tooth lock washer, featuring M2.5x0.45 thread size, 4 mm length, stainless steel, passivated, pan head, in a 25-pack. Key specifications…
SKU 3G-OTH-532120
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Product Description
The SEMS Screw: Internal Tooth (SKU 849C17) is a machine screw with an internal tooth lock washer, featuring M2.5x0.45 thread size, 4 mm length, stainless steel, passivated, pan head, in a 25-pack. Key specifications include a #1 drive size and manufacturer part number 1-MPI-2.5-4.
Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.
Frequently Asked Questions
What is a SEMS screw with internal tooth lock washer used for?
A SEMS screw with an internal tooth lock washer is used to fasten components while resisting loosening from vibration. The pre-assembled washer bites into the mating surface, making it ideal for electrical grounding, panel assembly, and general industrial fastening applications.
What are the specifications of the SEMS screw M2.5x0.45 4 mm?
This SEMS screw has an M2.5x0.45 thread, 4 mm length, stainless steel passivated finish, pan head, #1 drive size, and includes an internal tooth lock washer. It comes in a 25-pack with manufacturer part number 1-MPI-2.5-4.
Where to buy SEMS screws in worldwide?
3G Electric supplies SEMS screws worldwide, handling full logistics and customs clearance. As a global industrial solutions provider, we source and deliver genuine fasteners like the M2.5x0.45 internal tooth screw to any location. Contact us for pricing and lead time.
How to select the right SEMS screw for an application?
Select a SEMS screw by matching thread size (M2.5x0.45), length (4 mm), head style (pan), and drive size (#1) to your assembly requirements. The internal tooth lock washer provides vibration resistance; choose stainless steel passivated for corrosion resistance in demanding environments.
SEMS Products
3G Electric supplies SEMS machine screws with internal tooth lock washers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.









