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SEMS #4-40 x 1/4 in Stainless Steel Pan Head Machine Screw with - Machine Screws with Internal Tooth Lock Washers
SEMSMachine Screws with Internal Tooth Lock Washers

SEMS #4-40 x 1/4 in Stainless Steel Pan Head Machine Screw with

The SEMS Screw: Internal Tooth is a #4-40 thread size, 1/4 in long, stainless steel, passivated, pan head machine screw with an internal tooth lock washer, supplied in a 50-pack (MPN 1-PPI-4C-25). It features a #1…

SKU 3G-OTH-532063

Also listed as: 1PPI4C25 · 1 PPI 4C 25

Brand
SEMS
Item
#4-40 x 1/4 in Stainless Steel Pan Head Machine Screw with
Category
Machine Screws with Internal Tooth Lock Washers
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Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

SEMS
Manufacturer Part Number
1-PPI-4C-25
Type
#4-40 Thread Size, Stainless Steel, Passivated, Pan, 50 PK
Lg
1/4 in
Drive Size
#1

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SEMS Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SEMS Screw: Internal Tooth is a #4-40 thread size, 1/4 in long, stainless steel, passivated, pan head machine screw with an internal tooth lock washer, supplied in a 50-pack (MPN 1-PPI-4C-25). 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 needed. The pre-assembled washer bites into the mating surface to prevent loosening. Common in machinery, electrical enclosures, and panel assembly across industrial sectors.

What are the specifications of the SEMS screw #4-40 thread size?

This SEMS screw has a #4-40 thread size, 1/4 in length, stainless steel construction with passivated finish, pan head, and a #1 drive size. It includes an internal tooth lock washer and comes in a 50-pack with MPN 1-PPI-4C-25. The passivated surface offers corrosion resistance.

Where to buy SEMS screws with internal tooth lock washer worldwide?

3G Electric supplies SEMS screws with internal tooth lock washer worldwide. As a global industrial solutions provider, we handle logistics, customs, and delivery to your location. Contact us to order the #4-40 thread size, 1/4 in length, stainless steel passivated pan head screw in 50-pack quantities.

How to select the right SEMS screw for an application?

Select a SEMS screw by matching thread size, length, head type, and material to your assembly requirements. For vibration-prone environments, the internal tooth lock washer provides grip. Ensure drive size matches your tool. Stainless steel passivated finish suits corrosive or clean environments. Verify torque specs per manufacturer guidelines.

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.

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