SEMS Screw: External Tooth, #4-40 Thread Size, 1/4 in Lg, Steel, Zinc-Plated
The SEMS Screw: External Tooth is a #4-40 thread size, 1/4 in length machine screw with an external tooth lock washer, made of steel with zinc plating and a pan, Phillips drive. Supplied in a 100-pack with a #1 drive…
SKU 3G-OTH-528625
Also listed as: MPPEI0400250100P · MPPEI0 400250 100P
Local availability & support — Singapore
- Local office
- 20 Woodlands Link #09-05, Singapore 738733
- Phone
- +65 8878 8355
- Delivery
- Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
- Payment
- Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
- Ships to
- Singapore
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Product Description
The SEMS Screw: External Tooth is a #4-40 thread size, 1/4 in length machine screw with an external tooth lock washer, made of steel with zinc plating and a pan, Phillips drive. Supplied in a 100-pack with a #1 drive size (MPN MPPEI0-400250-100P), this product is part of 3G Electric's curated industrial offering across 14 departments, with specialist depth in fasteners and controls.
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 while resisting loosening from vibration. The pre-assembled washer bites into the mating surface, making it ideal for industrial assembly, machinery, and electrical enclosures where a secure, permanent fastening is required.
What are the specifications of the SEMS screw #4-40 x 1/4 in?
This SEMS screw has a #4-40 thread size, 1/4 in length, steel construction with zinc plating, a pan head, and Phillips drive with #1 drive size. It includes an external tooth lock washer and comes in a 100-pack (MPN MPPEI0-400250-100P).
Where to buy SEMS screws #4-40 x 1/4 in worldwide?
3G Electric supplies SEMS screws #4-40 x 1/4 in worldwide, handling full logistics and customs clearance. As a global industrial solutions provider, we source genuine fasteners like this SEMS screw from SEMS and deliver to any international destination. Contact us for availability and lead time.
How to select the correct SEMS screw for an application?
Select a SEMS screw by matching thread size, length, and drive type to your assembly requirements. For vibration-prone environments, the external tooth lock washer provides added grip. Ensure the material (e.g., steel zinc-plated) is compatible with the mating surface to prevent galvanic corrosion.
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.
