SEMS Screw: Internal Tooth, M4x0.70 Thread Size, 30 mm Lg, Stainless Steel, Passivated
The SEMS Screw: Internal Tooth (SKU 849C32, MPN 1-MPI-4-30) is a machine screw with an integrated internal tooth lock washer, featuring an M4x0.70 thread size, 30 mm length, stainless steel construction with…
SKU 3G-OTH-532124
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Product Description
The SEMS Screw: Internal Tooth (SKU 849C32, MPN 1-MPI-4-30) is a machine screw with an integrated internal tooth lock washer, featuring an M4x0.70 thread size, 30 mm length, stainless steel construction with passivated finish, and a pan head with #2 drive size, supplied in a 10-pack.
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 integrated washer bites into the mating surface, making it ideal for machinery, electrical panels, and automotive assemblies where a secure, permanent hold is required.
What are the specifications of the SEMS screw M4x0.70 30 mm?
This SEMS screw has an M4x0.70 thread size, 30 mm length, stainless steel construction with a passivated finish, pan head, and #2 drive size. It comes in a 10-pack with manufacturer part number 1-MPI-4-30. The internal tooth lock washer is pre-assembled for convenience.
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 genuine fasteners like the M4x0.70 internal tooth screw and deliver to your facility. Contact us for pricing and lead time on your order.
How to install a SEMS screw with internal tooth lock washer?
Install a SEMS screw by driving it with a #2 drive tool into a pre-tapped hole or nut. The internal tooth washer is captive under the head, so no separate washer is needed. Tighten to the recommended torque for M4 stainless steel fasteners to ensure the washer bites and prevents loosening.
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.









