400PCS Hex Washer Head Self Drilling Tek Screws – 410 Stainless Steel, #8 #10 #12
400PCS Hex Washer Head Self Drilling Tek Screws – 410 Stainless Steel, #8 #10 #12
400PCS Hex Washer Head Self Drilling Tek Screws – 410 Stainless Steel, #8 #10 #12
400PCS Hex Washer Head Self Drilling Tek Screws – 410 Stainless Steel, #8 #10 #12
400PCS Hex Washer Head Self Drilling Tek Screws – 410 Stainless Steel, #8 #10 #12
400PCS Hex Washer Head Self Drilling Tek Screws – 410 Stainless Steel, #8 #10 #12
400PCS Hex Washer Head Self Drilling Tek Screws – 410 Stainless Steel, #8 #10 #12
400PCS Hex Washer Head Self Drilling Tek Screws – 410 Stainless Steel, #8 #10 #12
400PCS Hex Washer Head Self Drilling Tek Screws – 410 Stainless Steel, #8 #10 #12

400PCS Hex Washer Head Self Drilling Tek Screws – 410 Stainless Steel, #8 #10 #12

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400PCS Hex Washer Head Self Drilling Tek Screws – 410 Stainless Steel, #8 #10 #12

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150 Hastings Drive
Buffalo Grove IL 60089
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🔩 Hex Washer Head Self Drilling Tek Screws – 410 Stainless Steel (#8 #10 #12)

Get through metal roofing, steel studs, and sheet metal faster with this 400‑piece hex washer head self-drilling screw assortment. Each screw has a hardened drill‑bit tip that bores its own pilot hole, eliminates the need for a separate bit, and taps tight threads as it drives — true one‑step fastening. The hex washer head delivers a wide, load‑spreading bearing surface and lets you apply high torque with a standard socket or nut driver, so cam‑out is virtually nonexistent. Made from 410 stainless steel, these screws offer higher strength and hardness than 304, along with good atmospheric corrosion resistance — magnetic, durable, and built for HVAC ductwork, steel framing, auto panels, and outdoor wood construction. The kit covers three Imperial diameters (#8, #10, #12) and six popular lengths from 1/2″ to 2″, giving you the right fastener within arm’s reach for both quick repairs and large builds.

⚙️ Key Features – 410 Stainless Hex Washer Self-Drilling Screws

  • Self‑drilling tip removes the need for a pilot hole — the screw cuts its own path through steel studs, sheet metal, and wood
  • The hex washer head acts as an integrated washer to spread clamp load and stop pull‑through in thin materials
  • 410 stainless steel provides higher strength and hardness than 304, with solid atmospheric corrosion resistance indoors and outdoors
  • External hex drive allows high‑torque fastening with a standard socket — virtually no cam‑out or stripping
  • Imperial sizing: #8, #10, and #12 diameters with lengths from 1/2″ to 2″ — the most requested Tek screw range
  • 400‑piece kit with organized quantities of each common size so you can grab and go
  • Ideal for metal roofing, HVAC ducts, steel framing, auto body, wood sheds, and general construction

📋 Technical Specifications – Hex Washer Self-Drilling Tek Screws

Size Diameter (Approx.) Available Lengths Head Style Drive Material Qty in Kit
#8 ~4.2 mm 1/2″, 5/8″, 3/4″, 1″, 1-1/2″ Hex Washer Head External Hex (5/16″ or 3/8″) 410 Stainless Steel —
#10 ~4.8 mm 1/2″, 5/8″, 3/4″, 1″, 1-1/2″ Hex Washer Head External Hex (5/16″ or 3/8″) 410 Stainless Steel —
#12 ~5.5 mm 3/4″, 1″, 1-1/2″, 2″ Hex Washer Head External Hex (5/16″ or 3/8″) 410 Stainless Steel —

This 400‑piece kit includes: #8x1-1/2″ (80), #8x3/4″ (80), #8x1″ (60), #10-1/2″ (60), #10x3/4″ (40), #10x1″ (30), #12x3/4″ (25), #12x1-1/2″ (15), #12x2″ (10). Quantity per size listed reflects pack contents.

❓ Frequently Asked Questions – Hex Washer Tek Screws

🔸 Do I really not need a pilot hole with these?

That's correct. The drill‑shaped tip will punch through sheet metal up to about 2 mm thick and into wood without pre‑drilling. For thicker steel or very hard materials, a small pilot hole can reduce drive torque, but in most common applications, these are true one‑step fasteners.

🔸 How does 410 stainless compare to 304 or zinc‑plated steel?

410 stainless is harder and stronger than 304, offering good atmospheric corrosion resistance. It's magnetic and ideal for indoor and mild outdoor use. For constant saltwater exposure, 316 would be preferable, but for roofing, HVAC, and general construction, 410 holds up exceptionally well at a lower cost.

🔸 What size socket driver do I need?

Most #8 and #10 Tek screws use a 5/16″ (8 mm) hex socket, while #12 may use 5/16″ or 3/8″, depending on the exact head. A magnetic nut driver bit in 5/16″ and 3/8″ will cover the entire kit.

🔸 Can I use these for wood‑to‑metal connections?

Absolutely. The self‑drilling tip bites through the metal layer and threads tightly into the wood substrate beneath. They're widely used for fastening metal roofing to timber purlins, attaching brackets to wood studs, and similar mixed‑material assemblies.

🔸 Are these screws magnetic?

Yes, 410 stainless is magnetic, unlike 304 or 316. This can help retrieve dropped screws with a magnet, but they may not be suitable for extremely sensitive electronic applications where magnetism must be completely avoided.