Industrial Fastener · Screws Series
Self-Tapping Screw
Self-tapping screws cut their own thread in pre-drilled holes in metal, plastic, or wood. The point type determines the application: Type A and Type AB for thin sheet metal; Type B for thicker sheet; Type C (machine screw thread) for heavier sections.
Product Overview
Self-Tapping Screw sourcing essentials
Self-tapping screws cut their own thread in pre-drilled holes in metal, plastic, or wood. The point type determines the application: Type A and Type AB for thin sheet metal; Type B for thicker sheet; Type C (machine screw thread) for heavier sections.
Project or drawing specification
Material per requirement
Self-tapping screws cut their own thread in pre-drilled holes in metal, plastic, or wood. The point type determines the application: Type A and...
Inspection records, lot labels, certificate options, and destination-ready packing.
Technical Data
Specification range
Final dimensions, mechanical properties, finish, and packing are confirmed against the RFQ and applicable standard.
| Point Types | Type A (sharp gimlet), Type AB (sharp + machine thread), Type B (blunt), Type C (machine thread, blunt point) |
|---|---|
| Head Types | Pan, Hex washer, Countersunk, Truss, Round, Wafer |
| Drive Types | Phillips, Pozidriv, Slotted, Hex, Torx, Square |
| Diameter | #4 – #14 / M3 – M6.3 |
| Surface Finish | Zinc plated (most common), Yellow zinc, Black, Stainless |
Common surface finishes
Select an option to review its sourcing note. Exact coating system, thickness, and corrosion requirement are confirmed with the order.
Quality Control
Checked before consolidation and export
Each order is matched to the specified standard and verified at practical control points before shipment.
RFQ confirmation
Standard, size, grade, pitch, finish, certificates, packing, and destination are locked before production.
Lot verification
Critical dimensions, thread fit, markings, finish appearance, and packing labels are sampled and recorded.
Shipment approval
Photos and required reports are organized before consolidated loading and export documentation.
Buyer Questions
Frequently asked questions
Type A vs Type AB self-tapping screws — what's the difference?
Type A has a coarse thread suited to thin sheet metal (typically up to about 1.6 mm). Type AB has a sharper point and a higher-performing thread design that combines features of Type A and Type B; it's increasingly the default for thin sheet metal applications. Type B has a blunt point and is for thicker sheet.
Ready to quote Self-Tapping Screw?
Send the standard, size, grade, finish, quantity, packing requirement, and destination. Availability and lead time are confirmed with the inquiry.