UNI 5731 Mushroom head square neck bolts

Equivalent Standards

UNI 5731

Dimensions for UNI 5731 Mushroom head square neck bolts

Thread d p b dk ds f k r1 r2 r3 v
l ? 125mm 125 < l ? 200mm l > 200mm max min max min max min max min approx max max max min
M5 0.8 16 22 - 13.55 12.45 5 4.52 4.1 2.9 3.3 2.7 10.7 0.5 0.75 5.48 4.52
M6 1 18 24 - 16.55 15.45 6 5.52 4.6 3.4 3.88 3.12 12.6 0.5 0.9 6.48 5.52
M8 1.25 22 28 41 20.65 19.35 8 7.42 5.6 4.4 4.88 4.12 16 0.5 1.2 8.58 7.42
M10 1.5 26 32 45 24.65 23.35 10 9.42 6.6 5.4 5.38 4.62 19.2 0.5 1.5 10.58 9.42
M12 1.75 30 36 49 30.65 29.35 12 11.3 8.75 7.25 6.95 6.05 24.1 1 1.8 12.7 11.3
M16 2 38 44 57 38.8 37.2 16 15.3 12.9 11.1 8.95 8.05 29.3 1 2.4 16.7 15.3
M20 2.5 46 52 65 46.8 45.2 20 19.16 15.9 14.1 11.05 9.95 33.9 1 3 20.84 19.16