Heavy Duty Workhorse Size Twelve X Two Hex Washer Head Self Drilling Screws, 410 Stainless Steel Tek Fasteners For Sheet Metal, External Hex Self Tapping Bolts, Rock Solid Foolproof Install Pack Of 25
✔️ 0.21 inch (5 mm) thread width, 2 inch (50 mm) length, 11 mm flange
This pack contains twenty five heavy duty self tapping bolts designed to pierce through sheet metal and hardwood without needing separate pilot holes. These corrosion resistant fasteners are perfect for securing HVAC ducting, mounting equipment frames, building outdoor furniture, or attaching safety brackets to fence posts and timber structures. Crews rely on them for roofing, pergolas, and machinery assembly since the alloy handles humidity and temperature swings without weakening.
✅ 410 stainless steel body resists rust and handles harsh weather exposure✅ 0.433 inch (11 mm) flange diameter distributes load and stops pull through
✅ Eight millimeter (8 mm) external hex drive accepts standard wrenches for strong grip
✅ 2 inch (50 mm) thread coverage spans the full shaft length for maximum holding power
✅ Pointed tip acts as a built in drill bit to tap threads directly into material
💡 Why do roofers and fencing crews pick stainless steel tek screws over standard bolts?
- Rust resistant grades stay handy when bolted to wet wood or galvanized panels for long term reliability
- Built in drill points slice through hard sheet metal quickly, which takes the guesswork out of tough installation jobs
- Strong gripping threads lock tight against vibrating machinery, keeping structural attachments secure for years