Standard: BS 3692 (British Standard for precision hexagon bolts, screws, and nuts)
Thread Size: M3 (Metric thread, 3 mm nominal diameter)
Thread Pitch (Coarse): 0.5 mm (fine pitch option: M3×0.35)
Thread Type: ISO metric, 60° thread angle
Bolt Types Covered: Hex bolts, hex screws, and set screws
Material Grades: Commonly in A2/A4 stainless, mild steel, 8.8, brass, or nylon for specialized use
Tolerances: External thread tolerance 6g (standard fit according to BS 3692)
Head Type: Hexagonal (head dimensions standardized by BS 3692)
Applications: Used in electronics, instrumentation, control panels, small devices, robotics, and miniature enclosures
M3 Bolt – BS 3692 Standard
