Best Tapping Screws for Plastic: Assortment Kits for Repairs
The best tapping screws for plastic depend on the size of the part, screw diameter, and whether you need compact electronics hardware or larger sheet-metal-style fasteners. The 750-piece M1.7–M3 kit is best for small repairs, while the 625-piece M2–M4 assortment offers more size options. For larger projects, the mxuteuk, 170-piece #8, and Besitu kits provide longer screws in assorted sizes.
| Product | Best For | Key Details |
|---|---|---|
| 750-piece micro assortment | Electronics and small repairs | M1.7–M3, Phillips pan head |
| 625-piece assortment | More small-size options | 14 sizes, M2–M4 |
| mxuteuk 230-piece kit | General repair and mixed materials | #8, five lengths, washers |
| 170-piece #8 kit | Projects needing larger screws | Four listed lengths, hex head |
| Besitu 400-piece kit | Mixed-size sheet-metal-style work | #8 and #10, four lengths |
750-Piece M1.7–M3 Micro Screw Kit
Best for: Small plastic components, electronics, toys, and appliance repairs that call for compact screws. This kit contains 750 pieces in sizes from M1.7 to M3, with Phillips pan heads, sharp tips, and deep threads, according to the product details.
The listed carbon-steel construction and small size range make this a focused option for precise fastening rather than larger assembly jobs. It is selected for buyers who need many micro screws across a narrow range of diameters.
Limitation: The listed size range tops out at M3, so choose another kit if the project needs larger screws. Confirm the required screw dimensions before ordering.
625-Piece, 14-Size Small Screw Assortment
Best for: Repairers who want more small screw size choices in one kit. The assortment lists 14 sizes within the M2–M4 range and includes Phillips pan-head screws made of carbon steel. The product describes sharp tips and deep threads for use with plastic and thin metal.
Choose this kit over the 750-piece option if the extra size variety matters more than maximizing the total piece count. Its listed uses include electronics, appliances, toys, furniture assembly, and repairs.
Limitation: The product details do not identify the quantity of each individual size. Check the assortment breakdown if a project requires many screws of one exact dimension.
mxuteuk #8 Screws With Rubber Washers
Best for: Larger repairs involving plastic alongside metal or wood, where #8 screws and included washers suit the job. The set contains 230 pieces: 115 screws and 115 matching washers. It lists five screw lengths from 1/2 inch to 1-1/4 inch and identifies the material as 410 stainless steel.
The truss-head design, cross recess, and included washers distinguish this kit from the small metric assortments. The product says its drill-point screws can drill into metal without pre-drilling; for plastic, select a suitable pilot hole and avoid overtightening.
Limitation: These are larger #8 fasteners, not a substitute for M2 or M3 micro screws. The listing also notes that 410 stainless steel is magnetic.
170-Piece #8 Hex-Head Screw Kit
Best for: Buyers who need a #8 assortment with longer options for plastic, wood, or sheet-metal projects. The product name specifies 170 stainless-steel self-drilling screws in 5/8-inch, 3/4-inch, 1-inch, and 1-1/2-inch lengths, with hex heads.
This kit is a better fit than micro screw assortments when the project calls for larger fasteners and a hex-head drive. Its stated material and multi-length assortment make it relevant to mixed-material repair work.
Limitation: The provided product details do not specify the distribution of lengths or additional construction details. Verify the exact size needed before selecting it for a plastic part.
Besitu 400-Piece #8 And #10 Screw Kit
Best for: Larger mixed-material jobs where both #8 and #10 fasteners are useful. The product name lists 400 self-tapping screws made from 410 stainless steel, with black oxide and truss heads. Lengths range from 1/2 inch to 1-1/4 inch.
Choose this assortment if you want more pieces and two listed screw sizes rather than a small metric kit. Its stated applications include metal, plastic, and RV projects.
Limitation: The supplied details do not provide the quantity per size or length. These larger screws may be unsuitable for delicate or thin plastic components.
Buying Guide: How To Choose Tapping Screws For Plastic
What screw size should I choose?
Match the screw diameter and length to the plastic part and the existing hole, if there is one. M1.7–M4 kits suit small hardware needs, while #8 and #10 screws are larger options. Do not assume that a screw will fit just because the listing says it works with plastic; compare the measurements with the part and its intended fastening point.
Should I use a pilot hole in plastic?
A pilot hole can help guide the screw and reduce the chance of splitting or stressing plastic. The correct hole size depends on the screw and material, so follow the component or fastener guidance when available. Start straight, use controlled pressure, and stop when the screw is seated. Overtightening can damage plastic or its threads.
Which head style is better?
Phillips pan heads appear in the small metric kits and suit buyers seeking compact, cross-drive hardware. The larger assortments list truss or hex heads. Choose a head and drive that fit the available clearance and tool; avoid substituting a different drive type if it does not seat securely.
Does material matter for indoor or outdoor use?
The small kits list carbon steel, while the larger kits identify 410 stainless steel; one listing also describes a black oxide finish. Material alone does not establish suitability for every environment. Consider moisture exposure, the plastic being fastened, and the product’s stated use before choosing.
Frequently Asked Questions
Can self-tapping screws be used in plastic?
Yes. The listed assortments are described for plastic use, but the correct diameter, length, and installation method depend on the specific part.
Are M3 screws the same as #8 screws?
No. M3 is a metric size designation, while #8 is a different screw sizing system. Check the dimensions required by the project instead of treating them as interchangeable.
Are self-drilling screws always suitable for plastic?
No. A drill point is useful for some materials, but a plastic component can still split or become damaged. Use a suitable screw and controlled installation technique.
Which kit is best for small electronics repairs?
The 750-piece M1.7–M3 assortment is the most directly targeted option in this group for small electronics and precise repairs.