M2–M6 304 Stainless Steel Allen Hex Socket Wafer Head Self-Tapping Screw A2-70 Thin Flat Large Head

M2–M6 304 Stainless Steel Allen Hex Socket Wafer Head Self-Tapping Screw — A2-70 Thin Flat Large Head

The A2-70 304 stainless steel Allen hex socket wafer head self-tapping screw combines a large-diameter, ultra-thin flat head with a hex socket drive for high-torque installation in tight spaces. The self-tapping thread cuts directly into wood, plastic, and thin sheet metal without pre-tapping, making it ideal for electronics enclosures, panel assembly, and PCB bracket mounting.

Key Specifications

Why Choose This Wafer Head Self-Tapping Screw?

• Ultra-thin large head — maximum bearing surface with minimum protrusion; ideal where standard pan head is too tall
• Hex socket drive — higher torque than Phillips; no cam-out; compatible with standard Allen keys and hex bit drivers
• Self-tapping thread — cuts its own thread in wood, MDF, plastic, and thin aluminium sheet; no pre-drilling or tapping required
• A2-70 304 stainless — corrosion-resistant for indoor electronics, outdoor enclosures, and humid environments
• Metric sizing M2–M6 — covers the full range of electronics and light mechanical assembly

Typical Applications

• Electronics enclosure and instrument panel assembly (aluminium, ABS, polycarbonate)
• PCB bracket and DIN rail mounting in control cabinets
• Speaker cabinet and audio equipment assembly (wood/MDF)
• 3D printer frame and enclosure panel fastening
• Robotics chassis and servo bracket mounting
• Furniture and cabinetry assembly requiring flush, low-profile head

Compatible With

• Allen keys / hex bit drivers: M2=1.5mm, M3=2mm, M4=2.5mm, M5=3mm, M6=4mm hex
• Materials: wood, MDF, ABS, polycarbonate, HDPE, thin aluminium sheet (up to 1.5mm)
• Electric screwdrivers with hex bit adapters

Package Contents

• Self-tapping screws in selected size and quantity (per variant)

Frequently Asked Questions

Q: What is a wafer head screw?

A: A wafer head (also called thin flat large head or mushroom head) has a larger diameter than a standard pan head but a much lower profile. This provides a larger bearing surface to prevent pull-through in soft materials while keeping the head as flat as possible.

Q: Can these screws be used in metal?

A: Yes, in thin sheet metal up to approximately 1.5mm. For thicker metal, pre-drill a pilot hole slightly smaller than the screw's minor diameter. For structural metal fastening, use machine screws with a tapped hole instead.

Q: What hex key size do I need?

A: M2 requires 1.5mm hex; M2.5 requires 1.5mm hex; M3 requires 2mm hex; M4 requires 2.5mm hex; M5 requires 3mm hex; M6 requires 4mm hex.