ASME B18.6.4 — Thread Forming and Thread Cutting Tapping Screws and Metallic Drive Screws
Standard: ASME B18.6.4
ASME B18.6.4 covers inch-series self-tapping screws — thread-forming types A, AB, and B, thread-cutting types, and metallic drive screws that form or cut their own threads in sheet metal.
What It Covers
- Thread-forming screw types A, AB, and B
- Thread-cutting screw types
- Metallic drive screws
- Head styles and point designs