Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

TAMPER-PRUF SCREW Tamper Resistant Screw: #4-40 Thread Size, 1/2 in Lg, Stainless Steel, Plain - Round Head Tamper-Resistant Machine Screws
TAMPER-PRUF SCREWRound Head Tamper-Resistant Machine Screws

TAMPER-PRUF SCREW Tamper Resistant Screw: #4-40 Thread Size, 1/2 in Lg, Stainless Steel, Plain

The TAMPER-PRUF SCREW Tamper Resistant Screw is a #4-40 thread size, 1/2 in long, round head machine screw made of stainless steel with a plain finish and one-way drive. Supplied in a 100-piece pack (MPN 141404)…

SKU 3G-OTH-747369

Brand
TAMPER-PRUF SCREW
Item
Tamper Resistant Screw: #4-40 Thread Size, 1/2 in Lg, Stainless Steel, Plain
Category
Round Head Tamper-Resistant Machine Screws
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

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

Technical Specifications

TAMPER-PRUF SCREW
Manufacturer Part Number
141404
Type
Stainless Steel, Plain, Round, One-Way, 100 PK
Lg
1/2 in
Drive Size
#4

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

TAMPER-PRUF SCREW Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The TAMPER-PRUF SCREW Tamper Resistant Screw is a #4-40 thread size, 1/2 in long, round head machine screw made of stainless steel with a plain finish and one-way drive. Supplied in a 100-piece pack (MPN 141404), this #4 drive size fastener is designed for applications requiring permanent installation where removal is not intended.

Frequently Asked Questions

What is a Tamper Resistant Screw #4-40 used for?

A Tamper Resistant Screw #4-40 is used for permanent installations where removal is not intended, such as securing panels, signage, or equipment in public or high-security areas. The one-way drive prevents tampering, making it ideal for industrial, commercial, and infrastructure applications.

What are the specifications of the TAMPER-PRUF SCREW 141404?

The TAMPER-PRUF SCREW 141404 is a #4-40 thread size, 1/2 in long, round head machine screw in stainless steel with a plain finish and one-way drive. It has a #4 drive size and comes in a 100-piece pack. These specs ensure secure, permanent fastening in tamper-resistant applications.

Where to buy TAMPER-PRUF SCREW 141404 worldwide?

You can source the TAMPER-PRUF SCREW 141404 worldwide through 3G Electric, which handles full logistics, customs clearance, and delivery to global destinations. As a supplier of industrial fasteners across 14 departments, we provide genuine parts like this tamper-resistant screw for permanent installations.

How to install a one-way tamper-resistant screw?

Install a one-way tamper-resistant screw using a standard driver that matches the #4 drive size. Drive the screw clockwise until the head is flush with the surface. The one-way design prevents reverse rotation, so ensure correct placement before final tightening, as removal requires destructive methods.

TAMPER-PRUF SCREW Products

3G Electric supplies TAMPER-PRUF SCREW round head tamper-resistant machine screws. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
WALTER Screw Machine Drill Bit: #4, 130° Point, Cobalt, Parabolic Flute, Fast Spiral (MPN A1148-NO4)
WALTER
WALTER Screw Machine Drill Bit: #4, 130° Point, Cobalt, Parabolic Flute, Fast Spiral (MPN A1148-NO4)
LLAMBRICH Drill Chuck: 5/16"-24, 1/64 in to 1/8 in Capacity, SS, Ball Bearing (MPN SP-03 R-5/16 FGE)
LLAMBRICH
LLAMBRICH Drill Chuck: 5/16"-24, 1/64 in to 1/8 in Capacity, SS, Ball Bearing (MPN SP-03 R-5/16 FGE)
LLAMBRICH Drill Chuck: JT0, 1/64 in to 1/16 in Capacity, SS, Ball Bearing (MPN SP-15 J0 FGE)
LLAMBRICH
LLAMBRICH Drill Chuck: JT0, 1/64 in to 1/16 in Capacity, SS, Ball Bearing (MPN SP-15 J0 FGE)
LLAMBRICH Drill Chuck: JT0, 1/64 in to 1/8 in Capacity, SS, Ball Bearing (MPN SP-03 J0 FGE)
LLAMBRICH
LLAMBRICH Drill Chuck: JT0, 1/64 in to 1/8 in Capacity, SS, Ball Bearing (MPN SP-03 J0 FGE)
LLAMBRICH Drill Chuck: 5/16"-24, 1/64 in to 19/64 in Capacity, K1M Key, SS, Ball Bearing (MPN CSS-06 R-5/16 GE-DS)
LLAMBRICH
LLAMBRICH Drill Chuck: 5/16"-24, 1/64 in to 19/64 in Capacity, K1M Key, SS, Ball Bearing (MPN CSS-06 R-5/16 GE-DS)
LLAMBRICH Drill Chuck: 3/8"-24, 1/64 in to 1/8 in Capacity, SS, Ball Bearing (MPN SP-03 R-3/8 FGE-S)
LLAMBRICH
LLAMBRICH Drill Chuck: 3/8"-24, 1/64 in to 1/8 in Capacity, SS, Ball Bearing (MPN SP-03 R-3/8 FGE-S)

More from TAMPER-PRUF SCREW

View all TAMPER-PRUF SCREW parts
Tamper Resistant Screw: #10-24 Thread Size, 1 1/2 in Lg, Stainless Steel, Plain, Round, 25 PK (MPN 141503)
TAMPER-PRUF SCREW
Tamper Resistant Screw: #10-24 Thread Size, 1 1/2 in Lg, Stainless Steel, Plain, Round, 25 PK (MPN 141503)
Tamper Resistant Screw: #10-32 Thread Size, 1/2 in Lg, Steel, Zinc-Plated, Round, One-Way, 100 PK (MPN 141190)
TAMPER-PRUF SCREW
Tamper Resistant Screw: #10-32 Thread Size, 1/2 in Lg, Steel, Zinc-Plated, Round, One-Way, 100 PK (MPN 141190)
Tamper Resistant Screw: #4-40 Thread Size, 3/8 in Lg, Stainless Steel, Plain, Round, One-Way, 100 PK (MPN 141403)
TAMPER-PRUF SCREW
Tamper Resistant Screw: #4-40 Thread Size, 3/8 in Lg, Stainless Steel, Plain, Round, One-Way, 100 PK (MPN 141403)
Tamper Resistant Screw: #6-32 Thread Size, 1/4 in Lg, Stainless Steel, Plain, Round, One-Way, 100 PK (MPN 141408)
TAMPER-PRUF SCREW
Tamper Resistant Screw: #6-32 Thread Size, 1/4 in Lg, Stainless Steel, Plain, Round, One-Way, 100 PK (MPN 141408)
Tamper Resistant Screw: #10-24 Thread Size, 1 1/2 in Lg, Steel, Zinc-Plated, Round, One-Way, 100 PK (MPN 141170)
TAMPER-PRUF SCREW
Tamper Resistant Screw: #10-24 Thread Size, 1 1/2 in Lg, Steel, Zinc-Plated, Round, One-Way, 100 PK (MPN 141170)
Tamper Resistant Screw: #6-32 Thread Size, 3/8 in Lg, Steel, Zinc-Plated, Round, One-Way, 100 PK (MPN 141030)
TAMPER-PRUF SCREW
Tamper Resistant Screw: #6-32 Thread Size, 3/8 in Lg, Steel, Zinc-Plated, Round, One-Way, 100 PK (MPN 141030)
Tamper Resistant Screw: #10-32 Thread Size, 1 1/2 in Lg, Steel, Zinc-Plated, Round, One-Way, 100 PK (MPN 141220)
TAMPER-PRUF SCREW
Tamper Resistant Screw: #10-32 Thread Size, 1 1/2 in Lg, Steel, Zinc-Plated, Round, One-Way, 100 PK (MPN 141220)
Tamper Resistant Screw: #8-32 Thread Size, 1 1/2 in Lg, Steel, Zinc-Plated, Round, One-Way, 100 PK (MPN 141120)
TAMPER-PRUF SCREW
Tamper Resistant Screw: #8-32 Thread Size, 1 1/2 in Lg, Steel, Zinc-Plated, Round, One-Way, 100 PK (MPN 141120)