Pan Head Self-Tapping Screws

Pan Head Self-Tapping Screws DIN 7981 | ST2.2–ST9.5 | Sheet Metal & Plastic Fastening

Pan head self-tapping screws manufactured to DIN 7981 feature a slightly rounded, low-profile head with a Phillips or Pozi drive recess. Designed for fastening sheet metal, plastic, and light-gauge materials without pre-drilling, these screws form their own threads as they are driven into the material. Available in ST2.2 to ST9.5 sizes with carbon steel and stainless steel options.

Material & Specifications

Size Range	ST2.2 to ST9.5 (#2 to #12)
Standard	DIN 7981, ISO 7050, ANSI B18.6.4
Material	Carbon Steel (Case Hardened), 304 SS, 410 SS
Surface / Coating	Zinc Plated (Cr3+ RoHS), Black Oxide, Stainless Passivated
Head Type	Pan head with Phillips / Pozi / Torx drive
Thread Type	Type A (sharp point), Type AB (gimlet point), Type B (blunt point)

Surface Treatment & Zinc Coating Quality

At BoltNutsPlus, we understand that surface treatment is critical to fastener longevity and performance. Our products undergo rigorous coating processes to ensure maximum corrosion resistance and durability. We offer five premium coating options, each tested to international standards:

• Hot-Dip Galvanizing (HDG) — Thick zinc layer (50-120μm) providing superior long-term corrosion protection for outdoor, marine, and industrial environments. Compliant with ISO 1461 / ASTM A153 standards. Salt spray resistance: 500-1,000+ hours. Ideal for structural steel assemblies exposed to harsh weather.
• Electroplated Zinc Blue-White (Zn Blue/White) — Bright, clean silver-blue appearance with 5-15μm zinc layer. Cr3+ passivation technology, fully RoHS compliant. Ideal for indoor machinery, electronics, and general-purpose applications requiring aesthetic appeal and moderate corrosion resistance.
• Color Zinc / Yellow Zinc (Iridescent Passivation) — Multi-colored iridescent passivation film offering enhanced corrosion resistance (100-200 hours salt spray) with a distinctive golden finish. Widely preferred in automotive, agricultural equipment, and construction machinery sectors for its balanced protection and visual appeal.
• Dacromet Coating — Advanced water-based zinc-chromium coating technology with NO hydrogen embrittlement risk. Provides 1,000+ hours salt spray resistance, making it the preferred choice for high-strength fasteners in extreme environments. Environmentally friendly (no heavy metal discharge), RoHS/ELV compliant, ideal for automotive and wind energy applications.
• Multi-Element Alloy Co-Permeation — Zinc-aluminum-rare earth alloy layer offering 2-3x the corrosion resistance of traditional galvanizing. Features self-healing properties at scratch points, ensuring long-term protection even in damaged areas. Ideal for critical infrastructure, power transmission towers, coastal projects, and marine installations.

Key Features

• Self-tapping design eliminates need for pre-drilling in most materials
• Pan head provides clean finish with moderate bearing surface
• Case-hardened carbon steel for sharp, durable cutting threads
• Multiple drive options: Phillips, Pozi, Torx (for high-torque applications)
• Available in Type A (sheet metal) and Type AB (general purpose) point styles
• RoHS compliant Cr3+ zinc plating for corrosion resistance

Applications

• Sheet metal enclosure and cabinet assembly
• Plastic housing and component fastening
• HVAC ductwork and sheet metal connections
• Electrical junction box and panel mounting
• Automotive interior trim and panel fastening
• General-purpose DIY and maintenance repairs

Why Choose BoltNutsPlus?

• ISO 9001:2015 Certified Manufacturing — consistent quality you can trust on every batch
• 15+ Years of Export Experience — serving 40+ countries across 6 continents
• Full Traceability — material certificates (EN 10204 3.1) and comprehensive test reports included
• Custom Packaging & OEM/ODM — your brand identity, your specifications, our precision manufacturing
• Third-Party SGS / Bureau Veritas Inspection Available upon request
• 24-Hour Quote Response — same-day reply for urgent requirements; standard 24-hour turnaround