SAE J78 — Steel Self-Drilling Tapping Screws
Standard: SAE J78
SAE J78 standardizes steel self-drilling tapping screws (TEK screws) — the screws that drill their own hole and tap threads in one operation.
What It Covers
- Drill point numbers (TEK 1–5)
- Drilling capacity by point
- Thread-forming and cutting types
- Head styles and washers