50PCS #8 M4.2 410 Sheet Metal Self-Tapping Screws 410 Stainless Steel Flat Head High-Strength Quick Self-Drilling Screws
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SKU: 14:173#4.2x19 50pcs
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410 Stainless Self-Drilling Screws — Hex-Washer Head, Precision Thread (Model CZW-01)
Heavy-duty self-drilling (TEK-style) fasteners made from 410 stainless steel for high strength, magnetic pickup, and dependable corrosion resistance. The hex-washer head provides broad bearing surface and excellent drive control, while the precision-cut threads and drilling point speed installation in thin sheet, soft metals, plastics, and select non-metal substrates.
- Material: 410 stainless steel — corrosion-resistant, high strength, magnetic
- Head: Hex-washer head for stable bearing and reduced cam-out
- Point: Self-drilling tip for fast, pilot-free starts in thin sheet (thickness dependent)
- Thread: Deep, clean, precision-cut threads for strong holding power
- Use: Soft metals, thin sheet, non-metal substrates; indoor/outdoor service
Technical Specifications
| Model | CZW-01 |
|---|---|
| Product Type | Self-drilling screw (TEK-style) with hex-washer head |
| Material | 410 stainless steel (magnetic), high hardness vs. copper alloys |
| Head / Drive | Hex-washer head (driver size per variant) |
| Point | Self-drilling tip (pilot generally not required in thin sheet) |
| Thread | Precision, deep thread for strong bite in soft metals/non-metals |
| DIY Category | Metalworking |
| Chemicals of Concern | None declared |
| Origin | Mainland China |
| Brand | Conversions Tech |
Notes: Optimal for thin-gauge sheet and soft metals; drilling capacity depends on drill-point style/length. In wood, treat as self-tapping (a small pilot helps prevent splitting). Maintain edge distance, clear chips from the hole, and avoid over-torque to prevent head twist-off. For splash sealing, use with sealing washers or post-sealant as required.
Package
- Pack size and dimensions: per variant selection (contact us for size chart and driver size)
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FAQs
What is 410 stainless and why use it for screws?
Do I need a pilot hole?
What substrates are recommended?
Are these screws magnetic?
What driver should I use?
How do I avoid snapping the head?
Will these resist rust outdoors?
What’s the difference between self-drilling and self-tapping?
Can I use them in plastics?
Do they include sealing washers?
Recommended drill speed?
How thick of steel can they drill?
Do I need to clear chips?
Are they suitable for high-temperature environments?
Will they strip in a screw gun?
Do these meet CE or other certifications?
What head advantage does the hex-washer provide?
Can I paint over the heads?
Are sizes and pack counts customizable?
Any storage tips?
Return/warranty policy?
4 Reasons Pros Buy Direct from Conversions Tech
Headquartered in business-friendly Wyoming, we design, test, and ship every product from inside the United States—delivering genuine “Made-for-America” quality without the big-box markup.
Our in-house team owns every CAD file, mold, and QA station behind our weatherproof boxes, conduit bodies, and power inverters. Vertical control means tighter tolerances, UL-listed safety, and up to 30 % lower cost than private-label imports.
Thousands of SKUs sit ready to go. Orders placed by 2 p.m. ship the same day, keeping contractors, OEMs, and distributors on schedule.
Need a torque spec or an OEM quote at dawn? You’ll speak directly with the Conversions Tech engineering desk—not a script reader—for instant answers, custom kitting, and private-label options.
Bottom line: For rugged, code-compliant electrical solutions shipped fast from a trusted U.S. source, choose Conversions Tech and build it right the first time.
