OpenSpecEngineering

Sources:
[1] Dimensioning and Tolerancing, ASME Y14.5, 2018.
[2] Screw Thread Representation, ASME Y14.6, 2001 (R2018).
[3] Clearance Holes for Bolts, Screws, and Studs, ASME B18.2.8, 1999 (R2010).
[4] Insert, Screw Thread — Locked in, Key-Locked, NASM33537, National Aerospace Standard, 2007.
[5] Stanley Engineered Fastening, Heli-Coil Screw Thread Inserts, product catalog. Danbury, CT, USA: Stanley Engineered Fastening.

Reference content only — not a substitute for professional engineering judgment. Verify all values, tolerances, and specifications against current official standards before use in production or safety-critical work. Provided without warranty of accuracy or fitness for any purpose.