390PCS 410 Stainless Steel Hex Washer Head Self - Drilling TEK Screw Set - HomeDIYer
390PCS 410 Stainless Steel Hex Washer Head Self - Drilling TEK Screw Set - HomeDIYer
390PCS 410 Stainless Steel Hex Washer Head Self - Drilling TEK Screw Set - HomeDIYer
390PCS 410 Stainless Steel Hex Washer Head Self - Drilling TEK Screw Set - HomeDIYer
390PCS 410 Stainless Steel Hex Washer Head Self - Drilling TEK Screw Set - HomeDIYer
390PCS 410 Stainless Steel Hex Washer Head Self - Drilling TEK Screw Set - HomeDIYer
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390PCS 410 Stainless Steel Hex Washer Head Self - Drilling TEK Screw Set - HomeDIYer390PCS 410 Stainless Steel Hex Washer Head Self - Drilling TEK Screw Set - HomeDIYer390PCS 410 Stainless Steel Hex Washer Head Self - Drilling TEK Screw Set - HomeDIYer390PCS 410 Stainless Steel Hex Washer Head Self - Drilling TEK Screw Set - HomeDIYer390PCS 410 Stainless Steel Hex Washer Head Self - Drilling TEK Screw Set - HomeDIYer390PCS 410 Stainless Steel Hex Washer Head Self - Drilling TEK Screw Set - HomeDIYer

410 Stainless Steel Hex Washer TEK Screws – 390pcs Self-Drilling Set

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$19.99 USD $34.69 USD
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In stock (223 units), ready to be shipped

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Description

410 Stainless Steel Hex Washer Head TEK Screws — 390-Piece Self-Drilling Assortment

Metal roofing, HVAC ductwork, and structural metal framing all share one common frustration: stopping to pre-drill pilot holes slows everything down. These 410 stainless steel TEK screws eliminate that step — the self-drilling tip bores through metal on contact, so you drive and fasten in a single motion with a standard hex driver.

The hex washer head design distributes clamping pressure across a wider surface area than pan or flat heads, making it the preferred choice for thin metal sheet applications where pull-through resistance matters. The 410 stainless steel construction (Rockwell hardness C35–45) provides corrosion resistance rated for outdoor, coastal, and industrial environments, and remains magnetic for applications where that property is required.

This 390-piece assortment covers sizes #8 through #14 in lengths from 3/4" to 1-1/2", organized in a compartmentalized storage box. Suitable for metal roofing, HVAC assembly, deck construction, industrial machinery, and general sheet metal fastening.

✅ Compatible with standard 1/4" hex drivers, power drills, and impact drivers. Suitable for thin metal sheet, wood, drywall, and composite panels. Sizes #8–#14, lengths 3/4” to 1-1/2”.

✅ Key Features of This 410 Stainless Steel TEK Screw Set

  • 🔩 410 Stainless Steel — Rockwell C35–45: Higher corrosion resistance than standard carbon steel screws. Resists rust, oxidation, and mild chemical exposure. Rated for temperatures from -20°F to 1200°F (-29°C to 649°C). Remains magnetic — useful for applications requiring magnetic fasteners.
  • 🛠️ Self-Drilling Tip — No Pilot Hole Required: The integrated drill-point tip bores directly into compatible metal surfaces on contact. Eliminates the pre-drilling step for significant time savings on repetitive fastening tasks.
  • 🔧 Hex Washer Head for Maximum Holding Power: The hexagonal head with integrated washer distributes clamping pressure across a wider surface area, reducing pull-through on thin metal sheet. Drives with a standard 1/4" hex bit — no special tools required.
  • 💪 Sharp, Precision-Cut Threads: High-precision thread cutting produces clean, uniform threads that grip firmly without slippage or deformation. The thread profile maintains consistent tension under load and vibration.
  • 📦 390-Piece Assortment — Sizes #8 to #14: Multiple sizes and lengths (3/4" to 1-1/2") in one organized set. Covers the most common TEK screw sizes for roofing, HVAC, and structural metal applications without needing multiple separate purchases.
  • 🏠 Wide Application Range: Suitable for metal roofing, HVAC ductwork, deck construction, industrial machinery, electronic enclosures, gardening equipment, and general sheet metal assembly in home, office, and industrial settings.

🎯 Who Is This For?

🏗️ Roofing & HVAC Contractors

Speed up metal roofing panel installation and HVAC ductwork assembly. The self-drilling tip eliminates pilot holes on repetitive fastening runs, and the hex washer head provides the pull-through resistance required for thin metal sheet applications.

🔨 DIY Home Renovators

Attach metal brackets, secure sheet metal panels, or fasten hardware to wood and composite surfaces. The 390-piece assortment covers most home project needs, and the organized storage box makes it easy to find the right size quickly.

🏭 Industrial & Workshop Fabricators

Use in assembly lines, fabrication shops, and maintenance applications where corrosion-resistant fasteners are required. The 410 stainless steel construction handles exposure to oils, mild chemicals, and outdoor humidity.

🧰 General Maintenance & Repair

Keep a set on hand for ad-hoc repairs to metal enclosures, appliance panels, outdoor furniture frames, and storage units. The variety of sizes means you're covered for most unexpected fastening needs.

📏 Technical Specifications

Type Self-Drilling TEK Screws (Hex Washer Head)
Material 410 Stainless Steel (magnetic, corrosion-resistant)
Hardness Rockwell C35–45
Head Style Hex Washer Head (1/4" hex drive)
Drive Style 1/4" Hex (compatible with standard hex drivers and impact drivers)
Tip Type Self-drilling (no pilot hole required for compatible materials)
Sizes Included #8, #10, #12, #14
Lengths Included 3/4" to 1-1/2" (multiple lengths)
Quantity 390 pieces
Temperature Range -20°F to 1200°F (-29°C to 649°C)
Total Weight 983g (approx. 2.17 lb)
Compatible Materials Thin metal sheet, wood, drywall, composite panels
Recommended Environments Indoor and outdoor; suitable for humid, coastal, and industrial environments

❓ Frequently Asked Questions

Do I need to drill a pilot hole before using these TEK screws?

No — that's the defining feature of self-drilling (TEK) screws. The drill-point tip bores through compatible materials on contact as you drive the screw. For typical thin metal sheet, wood, and composite applications, no pre-drilling is required. For very thick or hardened steel beyond the screw's drilling capacity, a pilot hole may still be needed.

What driver do I need for hex washer head screws?

A standard 1/4" hex driver bit works with these screws — compatible with both manual nut drivers and power drills/impact drivers. Using a power drill or impact driver at moderate torque gives the best results. Too high a torque setting can over-drive the screw and strip the material around the hole.

Are these screws suitable for outdoor or coastal environments?

Yes. The 410 stainless steel construction provides corrosion resistance suitable for outdoor installations, metal roofing, and humid environments. It resists rust and mild acid exposure under normal outdoor conditions. Note that 410 stainless steel is magnetic — for fully submerged or severe salt-spray marine applications, 316 stainless steel would be a more appropriate choice.

What is the difference between #8, #10, #12, and #14 screw sizes?

The number refers to the screw's major thread diameter. #8 is the smallest (approx. 0.164") and #14 is the largest (approx. 0.242") in this set. Larger numbers indicate thicker screws with greater holding power, suitable for thicker or denser materials. The length (3/4" to 1-1/2") determines how deep the screw penetrates the material.

Why choose hex washer head over pan head or flat head for sheet metal?

The hex washer head has an integrated washer flange that distributes clamping pressure across a larger surface area than pan or flat heads. This reduces pull-through on thin metal sheet and provides better sealing against moisture ingress — important for roofing and outdoor applications. The hex drive also allows higher torque application without cam-out.

Can I use these screws with an impact driver?

Yes. Impact drivers work well with hex washer head TEK screws. Use a moderate torque setting to avoid over-driving, especially in thin metal sheet applications. The 1/4" hex shank is directly compatible with standard impact driver chucks — no adapter needed.

How many screws of each size are in the 390-piece set?

The exact quantity breakdown by size and length is shown in the product images. The set is designed to provide a practical assortment of the most commonly used sizes (#8–#14) and lengths (3/4"–1-1/2") for roofing, HVAC, and general sheet metal applications.

What is the temperature rating of 410 stainless steel screws?

410 stainless steel maintains its mechanical properties from -20°F to 1200°F (-29°C to 649°C). This makes it suitable for applications near heat sources, HVAC systems, and outdoor environments with significant temperature variation. Above 1200°F, the material may begin to lose hardness and corrosion resistance.

🛒 Add to cart above to get your 390-piece 410 stainless steel TEK screw assortment.

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