Content with basic dimensions

Dimensions for selected, most popular sizes Size (d) M12 M16 M20 M22 M24 M27 M30 M33 M36 M39 Pitch 1.75 2 2.5 2.5 3 3 3.5 3.5 4 4 Length tolerances Nominal length (l) 3000 2000 1000 Minimum/Maximum ±10.5 ±7.5 ±4.5 Nominal length (l) 500-420 400-320 300-260 240-190 Minimum/Maximum ±1.25 ±1.15 ±1.05 ±0.925 Nominal length (l) 180-130 120-85 80-55 50-35 30-20 18-12 10-8 6-5 Minimum/Maximum ±0.8 ±0.7 ±0.6 ±0.5 ±0.42 ±0.
Read more about DIN 976-1 Basic Dimensions for fully threaded studding, threaded bar, stud bolt ↬

Dimensions of Nut Face Washers (HN) Size (d) M12 M16 M20 M22 M24 M27 M30 M36 Internal diameter (d1) 12.1-12.35 16.1-16.35 20.1-20.40 22.3-22.60 24.2-24.50 27.2-27.55 30.2-30.55 36.2-36.55 External diameter (d2) 22.7-24 27.7-29 34.4-36 37.4-39 41.4-43 46.4-48 50.1-52 60.1-62 Thickness (h) 2.7-4.3 3.7-4.3 3.7-4.3 3.7-4.3 3.7-4.3 4.4-5.6 4.4-5.6 5.4-6.6 Dimensions of Bolt Face Washers (HB) Size (d) M12 M16 M20 M22 M24 M27 M30 M36 Internal diameter (d1) 13-13.27 17-17.27 21-21.33 23-23.
Read more about BS EN 14399-9 Basic dimensions for Nut Face Washers & Bolt Face Washers ↬

Dimensions from most preferred sizes Dimensions (d) M16 M20 M24 M30 M36 b 116-122 120-127.5 124-133 130-140.5 136-148 ds 15.3-16.7 19.16-20.84 23.16-24.84 29.16-30.84 35-37 k (nom) 10 12.5 15 17.7 22.5 k 9.25-10.75 11.6-13.4 14.1-15.9 17.65-19.75 21.45-23.55 s 23.16-24 29.16-30 35-36 45-46 53.8-55 f (nom) 8 10 12 15 18 f 7.25-8.75 9.25-10.75 11.1-12.9 14.1-15.9 17.1-18.9 v 15.3-16.7 19.16-20.84 23.16-24.84 29.16-30.84 35-37 Tolerances on nominal length Nominal length (mm) Tolerance (mm) 250 < / <= 315 +/- 5.
Read more about BS 7419 Holding down bolts - Basic dimensions ↬

Selected sizes used for CE (UKCA) marked BS EN 15048 Non-preloaded structural bolting assemblies Diameter (d) M12 M16 M20 M22 M24 M27 M30 M33 M36 d1 13.50-13.93 17.50-17.93 22.00-22.52 24.00-24.52 26.00-26.52 30.00-30.52 33.00-33.62 36.00-37.00 39.00-40.00 d2 22.7-24.0 28.7-30.0 35.4-37.0 37.4-39.0 42.4-44.0 48.4-50.0 54.1-56.0 58.1-60.0 64.1-66.0 h (nom) 2.5 3 3 3 4 4 4 5 5 h 2.2-2.8 2.4-3.6 2.4-3.6 2.4-3.6 3.4-4.6 3.4-4.6 3.4-4.6 4.0-6.0 4.0-6.0 Larger sizes Diameter (d) M42 M45 M48 M52 d1 45.
Read more about ISO 7091 Plain washers - Basic dimensions ↬

Selected sizes used for CE (UKCA) marked BS EN 15048 Non-preloaded structural bolting assemblies Diameter (d) M12 M16 M20 M22 M24 M27 M30 M33 M36 Thread pitch (P) 1.75 2 2.5 2.5 3 3 3.5 3.5 4 k (nom) 7.5 10 12.5 14 15 17 18.7 21 22.5 k (Grade A) 7.32-7.68 9.82-10.18 12.285-12.715 13.785-14.215 14.785-15.215 – – – – k (Grade B) 7.21-7.79 9.71-10.29 12.15-12.85 13.65-14.35 14.65-15.35 16.65-17.35 18.28-19.12 20.
Read more about ISO 4017 Hexagon head screws - Basic dimensions ↬