SEMS Screw: Internal Tooth, #4-40 Thread Size, 3/4 in Lg, Stainless Steel, Passivated
The SEMS Screw: Internal Tooth (SKU 849AY5, MPN 1-PPI-4C-75) is a #4-40 thread size, 3/4 in long, stainless steel, passivated, pan-head machine screw with an internal tooth lock washer, supplied in a 25-pack. It…
SKU 3G-OTH-532066
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Product Description
The SEMS Screw: Internal Tooth (SKU 849AY5, MPN 1-PPI-4C-75) is a #4-40 thread size, 3/4 in long, stainless steel, passivated, pan-head machine screw with an internal tooth lock washer, supplied in a 25-pack. It features a #1 drive size and is designed for applications requiring a pre-assembled fastener that resists loosening under vibration.
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 in applications where vibration could loosen a standard fastener. The pre-assembled washer bites into the mating surface to resist loosening, making it ideal for machinery, panels, and electrical enclosures.
What are the specifications of the SEMS screw #4-40 x 3/4 in?
This SEMS screw has a #4-40 thread size, 3/4 in length, stainless steel construction with passivated finish, pan head, and #1 drive size. It includes an internal tooth lock washer and comes in a 25-pack. The manufacturer part number is 1-PPI-4C-75.
Where to buy SEMS screws #4-40 in worldwide?
3G Electric supplies SEMS screws like the #4-40 x 3/4 in internal tooth type to worldwide locations. We handle full logistics and customs clearance, ensuring delivery to your facility. Contact us for pricing and lead time on this fastener.
How to select the right SEMS screw for vibration resistance?
To select a SEMS screw for vibration resistance, match thread size and length to your application. The internal tooth lock washer provides bite into the surface. For corrosive environments, choose stainless steel with passivation. Verify drive size matches your tooling.
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.
