Wafer Head Tek Screw 8-18 x 12, Class 3: Performance Data

Key things to remember

The essentials from this document in plain words. Check the full document before you rely on a figure.

• ✓Part T9PM3WP0818012: 8 gauge, 18 TPI, 12mm long, 8.2mm wafer head, Phillips #2 drive, packs of 1,000.
• ✓C1022 hardened steel, Class 3 finish. Listed uses include metal to metal fixing, aluminium wall cladding, signs to metal cladding, conduit and pipe saddles, light gauge metal battens and metal backpans.
• ✓Working pullout load: 300N in 0.7mm G2 sheet, 550N in 1.1mm G2, 1,250N in 1.5mm G550, 1,650N in 2.0mm G450 and 2,200N in 2.5mm G450 steel. Working loads already include a factor of safety of 2.5 for steel; mean and characteristic loads are also listed. All values are laboratory results.
• ✓Characteristic shear strength 4,050N and characteristic tensile strength 6,750N (mean 4,850N and 8,050N); torsional strength 4.7Nm.
• ✓Drill point test: through 1.5mm G450 steel under an 18kg load at 2,200RPM in no more than 4 seconds (3 seconds average).
• ✓Install with a cordless screwdriver set between 2,200 and 3,000RPM, with consistently firm pressure while it drills. Do not over-tighten, and impact drivers are not recommended.

Who it helps: Builders, roofers and fabricators choosing a small screw for light gauge metal, and staff checking pullout figures.