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Finding the right self-drilling screw diameter and length for a mixed-material project shouldn’t require multiple trips to the hardware store. This product covers both M4.2 and M4.8 thread diameters across seven lengths — from 13 mm (approx. 1/2") to 50 mm (approx. 2") — so you can select exactly what your job demands.
Each screw is made from carbon steel with a galvanized finish for corrosion resistance. The flanged button head provides a wide bearing surface that distributes clamping load without a separate washer, and the Phillips drive is compatible with any standard power drill. Available in packs of 10 or 50 pieces per size.
Whether you’re assembling wood furniture, fastening metal panels, securing equipment, or tackling general DIY repairs, these self-drilling screws cut their own thread without a pilot hole — saving time and reducing the tools needed on site.
| Thread Size | Length | Pack Options |
|---|---|---|
| M4.2 | 13 mm (~1/2") | 10 pcs or 50 pcs |
| M4.2 | 16 mm (~5/8") | 10 pcs or 50 pcs |
| M4.2 | 19 mm (~3/4") | 10 pcs or 50 pcs |
| M4.2 | 25 mm (~1") | 10 pcs or 50 pcs |
| M4.2 | 32 mm (~1-1/4") | 10 pcs or 50 pcs |
| M4.2 | 38 mm (~1-1/2") | 10 pcs or 50 pcs |
| M4.2 | 50 mm (~2") | 10 pcs or 50 pcs |
| M4.8 | 13 mm (~1/2") | 10 pcs or 50 pcs |
| M4.8 | 16 mm (~5/8") | 10 pcs or 50 pcs |
| M4.8 | 19 mm (~3/4") | 10 pcs or 50 pcs |
| M4.8 | 25 mm (~1") | 10 pcs or 50 pcs |
| M4.8 | 32 mm (~1-1/4") | 10 pcs or 50 pcs |
| M4.8 | 38 mm (~1-1/2") | 10 pcs or 50 pcs |
| M4.8 | 50 mm (~2") | 10 pcs or 50 pcs |
Assemble wood furniture, secure shelving brackets, and fasten metal hardware without stopping to pre-drill — the flanged head keeps surfaces clean and snag-free.
Keep both M4.2 and M4.8 diameters on hand for mixed-material jobs. Order 10-piece packs for occasional use or 50-piece packs for ongoing projects.
Secure components, fix equipment housings, and fasten metal panels with a corrosion-resistant galvanized fastener that holds up in variable-temperature and humid environments.
| Thread Sizes | M4.2 & M4.8 |
|---|---|
| Lengths Available | 13 / 16 / 19 / 25 / 32 / 38 / 50 mm |
| Head Style | Flanged Button Head |
| Drive Style | Phillips |
| Point Type | Self-Drilling (TEK) |
| Thread Type | Coarse, Full Thread |
| Material | Carbon Steel |
| Finish | Galvanized (Zinc Coated) |
| Pack Options | 10 pcs or 50 pcs per size |
| Application | Wood, sheet metal, DIY projects — indoor & outdoor |
No. The self-drilling tip is designed to bore through wood and light-gauge metal without a pre-drilled pilot hole, saving time and reducing the number of tools needed for installation.
M4.2 and M4.8 refer to the outer thread diameter of the screw. M4.8 is slightly larger in diameter and provides a stronger hold in denser or thicker materials. M4.2 is better suited for lighter-gauge substrates or tighter clearance applications. Both are available in the same seven lengths.
The integrated flange around the base of the button head acts as a built-in washer, distributing the clamping load over a wider surface area. This reduces the risk of pull-through in softer materials and eliminates the need for a separate washer in most standard applications.
Yes. The galvanized zinc coating provides good corrosion and rust resistance for outdoor applications in typical environments. For highly corrosive marine or coastal conditions, stainless steel fasteners are generally recommended for long-term exposure.
A standard Phillips #2 bit fits these screws. A power drill or cordless screwdriver set to moderate torque is recommended to avoid stripping the head, especially in harder materials.
The 10-piece pack is ideal for small repairs, trial orders, or projects requiring only a few fasteners of a specific size. The 50-piece pack offers better value for larger projects or ongoing use. Both options are available for every size combination.
These screws are suitable for wood, sheet metal, and general DIY substrates. The self-drilling tip and coarse thread provide a secure hold across a wide range of materials commonly used in furniture assembly, equipment repair, and light fabrication.
