The TM Large Flat Head Screw (JIS B1111-1996) is a precision fastener featuring a wide, thin umbrella-shaped head. Its enlarged head (1.5–2× thread diameter) evenly distributes load, protecting soft materials like plastic, wood, or thin metal from crushing or cracking. Made from MLO8AI low-carbon steel or SUS304/316 stainless steel, it features high-precision 6g threads, smooth engagement, and multiple anti-corrosion surface options (zinc, Dacromet, phosphating).
Designed for efficiency, TM screws require no pre-drilled countersinks or washers, and the cross-slot head supports manual or automated assembly. With sizes ranging M2–M16 and lengths 5–100 mm (customizable), they are widely used in home appliances, furniture, electronics, light industry, and thin-walled mechanical parts, delivering reliable, corrosion-resistant, and easy-to-install fastening.
| Parameter | Details |
|---|---|
| Standard | JIS B1111-1996 |
| Product Type | Large flat head machine screw |
| Head Structure | Wide, thin umbrella-shaped head |
| Material & Strength | MLO8AI low-carbon steel (4.8), SUS304 stainless steel (A2-70), SUS316 stainless steel (A4-70) |
| Thread Type | Metric coarse (default), fine threads customizable; 6g accuracy, 60° angle, ISO 68-1 pitch |
| Slot Type | Cross-slot (PH/PZ), optional hex or Torx; optimized depth for torque efficiency |
| Surface Treatment | Blue/white zinc (48h salt spray), color zinc (72h), Dacromet (800h), black oxide, phosphating, stainless passivation |
| Size Range | M2–M16 diameter, 5–100 mm length (customizable), full thread default; half thread optional |
| Applications | Fastening soft or thin materials: plastic, wood, thin metal; widely used in home appliances, furniture, electronics, light industry, thin-walled machinery |
| Installation Advantage | No pre-drilled countersink or washers needed; manual or automated assembly; efficient, stable, and reliable |
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