SEMS Screw: Internal Tooth, #4-40 Thread Size, 1/8 in Lg, Stainless Steel, Passivated
The SEMS Screw: Internal Tooth is a #4-40 thread size, 1/8 in long, stainless steel, passivated, pan head machine screw with an internal tooth lock washer, supplied in a 50-pack (MPN 1-PPI-4C-18). It features a #1…
SKU 3G-OTH-532145
Need installation or engineering help?
Ask a question
Product Description
The SEMS Screw: Internal Tooth is a #4-40 thread size, 1/8 in long, stainless steel, passivated, pan head machine screw with an internal tooth lock washer, supplied in a 50-pack (MPN 1-PPI-4C-18). It features a #1 drive size.
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 in applications where vibration resistance is critical. The pre-assembled washer digs into the mating surface to prevent loosening. Common in electronics, automotive, and industrial assembly, this #4-40 stainless steel passivated pan head screw provides corrosion resistance and reliable clamping.
What are the specifications of the SEMS screw #4-40 1/8 in?
This SEMS screw has a #4-40 thread size, 1/8 in length, stainless steel passivated construction, pan head, and #1 drive size. It includes an internal tooth lock washer and comes in a 50-pack (MPN 1-PPI-4C-18). The passivated finish enhances corrosion resistance for demanding environments.
Where to buy SEMS screws #4-40 1/8 in worldwide?
3G Electric supplies SEMS screws #4-40 1/8 in worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this SEMS screw (MPN 1-PPI-4C-18) to your facility. Contact us for availability and lead time on this stainless steel passivated fastener.
How to select the correct SEMS screw for an application?
To select the correct SEMS screw, match thread size (#4-40), length (1/8 in), head style (pan), and drive size (#1) to your assembly requirements. Consider material compatibility: stainless steel passivated resists corrosion. The internal tooth lock washer provides vibration resistance. Verify clearance and torque specs per your application.
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.









