Standard: BS 3692 (British Standard for precision hexagon bolts, screws, and nuts)
Thread Size: M2.5 (Metric thread, 2.5 mm nominal diameter)
Thread Pitch (Coarse): 0.45 mm (fine pitch version: M2.5×0.35 may be available in special cases)
Thread Type: ISO metric, 60° thread angle
Bolt Types Covered: Hex bolts, hex screws, and set screws
Material Grades: Typically available in stainless steel (A2/A4), mild steel, brass, or nylon
Tolerances: External thread tolerance 6g (standard fine fit per BS 3692)
Head Type: Hexagonal (conforming to BS 3692 geometry)
Applications: Used in microelectronics, camera hardware, computer components, and other compact, precision assemblies
M2.5 Bolt – BS 3692 Standard
