What drive size does this bit socket have?

It features a 1/2" square drive compatible with standard 1/2" ratchets and accessories.

Which screw type is this bit socket suitable for?

It is designed for 4 mm metric hexagon socket (hex/allen) screws.

What is the overall length of this socket?

The total length of the Facom STM.4 bit socket is 60 mm.

Is this bit socket VDE insulated?

No, this tool is not VDE certified or insulated for live electrical work.

Is the bit removable from the socket base?

No, the hexagonal bit is permanently fitted and non-removable.

FACOM STM.4 screwdriver socket 1/2" for hexagon socket screws 4 mm

Name: FACOM STM.4 screwdriver socket 1/2" for hexagon socket screws 4 mm
Brand: FACOM
SKU: 41298566
Price: 13.95 EUR
Availability: InStock

Supplier number: FACOM STM.4 | EAN 3148517239715

Recommended Retail Price €20.92

13.95 tax incl.

€11.53 excl. VAT (incl. all environmental contributions)

On stock - immediately available

Ordered before 20:00 - delivered tomorrow 03/10/2026
Shipping costs €11.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL
Delivered from Belgium

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Reliable fastening with Facom

Practical benefits

Accurate torque transfer daily: You turn hexagonal fasteners securely without slipping, thanks to the precise 4 mm hex bit profile.
Standard 1/2" drive compatibility: You attach this socket bit directly to any standard 1/2" ratchet for smooth integration into your toolkit.
Robust and durable build: The rigid non-removable bit and chrome-plated body ensure long-lasting durability through demanding mechanical tasks.

In a nutshell

The right choise for

With the Facom STM.4 bit socket, you tighten and loosen 4 mm hexagon socket screws with precision and complete control. Thanks to the accurate hex profile and rigid non-removable bit, you achieve direct torque transfer without slipping, effectively protecting fastener heads from rounding. Featuring an overall length of 60 mm and a durable chrome-plated finish, this bit socket stands up to demanding daily mechanical tasks. You easily attach it to any standard 1/2" ratchet or torque wrench to maximize leverage and complete your assembly work efficiently.

Product information FAQ

€13.95

In stock - tax incl.

Key features according to our expert

Length: 60 mm
Type of drive profile (bit): Hexagon
Blade thickness: Not applicable
Connection size: 1/2"
VDE approved: No
With safety colour code 1000V: Not applicable
Bit tip: HEX 4 mm
Drive profile size (bit): 4 mm
Supplier warranty: FACOM - Lifetime (E)

Product description

STM - Screwdriver sockets 1/2" for hexagon socket screws, metric sizes

Features

Series with standard length.
For 6-sided socket head screws.
Fixed bits.
Design: bright chrome-plated, with phosphated bit.
Available as a set in a case (Ref STM.J9).

All Features

Length: 60 mm
Type of drive profile (bit): Hexagon
Blade thickness: Not applicable
Connection size: 1/2"
Vde approved: No
With safety colour code 1000v: Not applicable
Bit tip: HEX 4 mm
Drive profile size (bit): 4 mm
Supplier warranty: FACOM - Lifetime (E)
Length (mm): 60
Vde tested: No
Size (mm): 4
Diameter (mm): 22.8
Insulated 1000 v: No

Brand FACOM
41298566
EAN 3148517239715
Supplier number FACOM STM.4

Frequently asked questions about this product

Answered by specialists

What drive size does this bit socket have?: It features a 1/2" square drive compatible with standard 1/2" ratchets and accessories.
Which screw type is this bit socket suitable for?: It is designed for 4 mm metric hexagon socket (hex/allen) screws.
What is the overall length of this socket?: The total length of the Facom STM.4 bit socket is 60 mm.
Is this bit socket VDE insulated?: No, this tool is not VDE certified or insulated for live electrical work.
Is the bit removable from the socket base?: No, the hexagonal bit is permanently fitted and non-removable.