Best Thread Rolling Screws for Plastic: Strong, Corrosion-Resistant Options
Thread rolling screws designed for plastic offer reliable holding power without damaging soft materials. This guide highlights five top options, focusing on material, finish, and size to help you choose the right screw for projects involving plastic components. The selections emphasize corrosion resistance, strength, and compatibility with common drive types.
| Product | Material | Thread | Length | Pack |
|---|---|---|---|---|
| Small Parts 0408LPP188 | 18-8 Stainless Steel | #4-20 | 1/2″ (12.7 mm) | 50 |
| Small Parts 1012LPP410 | 410 Stainless Steel | #10-14 | 3/4″ (19 mm) | 25 |
| Small Parts 0406LPP410 | 410 Stainless Steel | #4-20 | 3/8″ (9.5 mm) | 50 |
| Small Parts 0612LPP410 | 410 Stainless Steel | #6-19 | 3/4″ (19 mm) | 25 |
| Small Parts 0610LPP | Steel | #6-19 | 5/8″ (15.9 mm) | 100 |
Small Parts Stainless Steel Thread Rolling Screw For Plastic
Product highlights: Thread rolling screws recommended for use in plastic. Steel provides strength-focused applications. Black oxide finish offers mild corrosion resistance and lubricity.
Small Parts Stainless Steel Thread Rolling Screw For Plastic
Product highlights: 18-8 stainless steel offers good corrosion resistance and strength. Passivated finish enhances natural stainless corrosion resistance. Pan head and Phillips drive with #4-20 thread size.
Small Parts 1012LPP410 Thread Rolling Screw For Plastic
Product highlights: 410 stainless steel provides high strength and hardness with corrosion resistance in mild environments. Passivated finish enhances stainless properties. Pan head, Phillips drive, #10-14 thread, 3/4″ length.
Small Parts 0612LPP410 Thread Rolling Screw For Plastic
Product highlights: 410 stainless steel with high strength and hardness. Resists corrosion in mild environments. Pan head and Phillips drive with #6-19 thread size, 3/4″ length, passivated finish.
Small Parts 0610LPP Steel Thread Rolling Screw For Plastic
Product highlights: Steel thread rolling screw for plastic with zinc plating. Reflective corrosion resistance and suitable for strength-focused applications. Pan head, Phillips drive, #6-19, 5/8″ length, 100-pack.
Buying Guide
When selecting thread rolling screws for plastic, consider material and finish, thread size, length, head type, and drive type. Stainless steels (18-8 and 410) offer different balances of strength and corrosion resistance. 18-8 stainless is excellent for general corrosion resistance, while 410 provides higher hardness and strength with adequate corrosion resistance in mild environments. Passivation further enhances stainless properties by reducing surface corrosion potential.
Thread size compatibility is crucial for secure fastening in plastic parts. Common sizes like #4-20, #6-19, and #10-14 cover a range of small to medium fastenings. Pan head designs provide broad bearing surfaces, reducing stress on soft plastics, while Phillips drives offer widely used compatibility with standard screwdrivers. Length should be matched to the plastic thickness plus a safe embedment to avoid cracking or protrusion.
Finish options such as black oxide can improve lubricity and corrosion resistance for steel screws, but may be less durable than stainless in harsher environments. Zinc plating offers a balance of cost, appearance, and corrosion resistance, but without the strength advantages of stainless alloys. In plastic assemblies, consider whether additional lubricants or thread-locking compounds are appropriate to prevent loosening due to vibration.
Practical considerations include the plastic material type (nylon, polycarbonate, ABS), anticipated load, exposure to moisture, and operating temperature. For high-strength needs or outdoor use, stainless-steel options provide greater longevity. For budget-conscious projects with indoor, mild environments, zinc-plated steel or 410 stainless can be suitable. Always verify compatibility with your specific plastic to minimize risk of damage during installation.