Which screwdriver bit is required for this screw?

This screw requires a T20 bit (T-STAR plus or standard Torx).

What is the benefit of a partial thread?

The partial thread pulls the top piece tightly against the underlying material without gaps.

What are the exact dimensions and thread length?

The screw has a diameter of 4.5 mm, an overall length of 40 mm, and a thread length of 25 mm.

Do you need to pre-drill before driving the screw?

Pre-drilling is generally not required in softwoods, but it is recommended for hardwoods.

What protection does the Wirox coating provide?

The Wirox coating provides significantly higher corrosion protection than standard galvanisation in indoor and covered outdoor areas.

SPAX 0191010450405 chipboard screw 4.5 x 40 mm countersunk head T-STAR plus T20 steel

Name: SPAX 0191010450405 chipboard screw 4.5 x 40 mm countersunk head T-STAR plus T20 steel
Brand: SPAX
SKU: 02608323
Price: 0.05 EUR
Availability: InStock

Supplier number: SPAX 0191010450405 | EAN 4003530155338

0.05 tax incl.

€0.04 excl. VAT (incl. all environmental contributions)

On stock - immediately available

The minimum purchase order quantity for the product is 500.

Ordered before 20:00 - delivered tomorrow 16/10/2026
Shipping costs €11.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL

✆ Talk to a specialist

Strong wood fastening with Spax screws

Practical benefits

Secure grip without slipping: The T-STAR plus T20 drive ensures precise bit fitment so you transmit maximum torque without cam-out.
Clean and flush finish: Thanks to the countersunk head, you sink the screw seamlessly into wood surfaces without splintering.
Long-lasting corrosion resistance: The advanced WIROX coating protects the steel against oxidation, ensuring you get strong and durable connections.

In a nutshell

The right choise for

With the Spax universal screw 4.5 x 40 mm, you achieve strong and precise wood joints in interior fittings and covered outdoor structures. The partial thread draws panels and timber components tightly against the substructure without leaving gaps. Thanks to the t-star plus T20 drive system, your bit fits securely into the head, preventing cam-out and allowing optimal torque transfer while fastening. The countersunk multi-head sinks flush into the wood surface without splintering. Featuring the advanced Wirox coating, this steel screw provides durable corrosion protection for furniture assembly, framing, and decorative woodwork.

Product information FAQ

€0.05

In stock - tax incl.

Key features according to our expert

Diameter: 4,5 mm
Material (Screw): Steel
Surface treatment screw: Wirox
Head shape (screw): Countersunk
type (screw head): T20
Drive type: Torx
Bolt/screw type: Partial wire
Thread length: 25 mm
Length: 40 mm

Product description:

Flat countersunk head, T-STAR plus
With MULTI Head and 4CUT, hardened, synthetic coating
Blue zinc plated A2J

Application:

Universal usage

Advantages:

No pre-drilling (wood-dependent)
Quick and safe fastening with reduced driving in torque (more screwed connections per battery charge)
Effectively reduces splitting of the wooden material, even when close to the edge
Multifunctional applications indoors

Special properties:

Partial thread: firm tightening of the upper wood layer
Blue zinc plated A2J
T-STAR plus: secure bit grip, no cam-out effect, optimal force transmission

Features:

4CUT: allows screwing in without pre-drilling (wood-dependent), reduces splitting as square end displaces the fibres
Ground serrations: up to the point - quick and secure fastening
MULTI Head: flush countersinking. Mills in wood and stops on metal

All Features

Diameter: 4,5 mm
Material (screw): Steel
Surface treatment screw: Wirox
Head shape (screw): Countersunk
Type (screw head): T20
Drive type: Torx
Bolt/screw type: Partial wire
Thread length: 25 mm
Length: 40 mm
Wire length: 25 mm

Brand SPAX
02608323
EAN 4003530155338
Supplier number SPAX 0191010450405

Frequently asked questions about this product

Answered by specialists

Which screwdriver bit is required for this screw?: This screw requires a T20 bit (T-STAR plus or standard Torx).
What is the benefit of a partial thread?: The partial thread pulls the top piece tightly against the underlying material without gaps.
What are the exact dimensions and thread length?: The screw has a diameter of 4.5 mm, an overall length of 40 mm, and a thread length of 25 mm.
Do you need to pre-drill before driving the screw?: Pre-drilling is generally not required in softwoods, but it is recommended for hardwoods.
What protection does the Wirox coating provide?: The Wirox coating provides significantly higher corrosion protection than standard galvanisation in indoor and covered outdoor areas.