BS 7419 Holding down bolts - Basic dimensions - Andrews Fasteners - CE Approved Bolts, Nuts & Washers
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BS 7419 Holding down bolts – Basic dimensions image

BS 7419 Holding down bolts – Basic dimensions

BS 7419 Holding down bolts – Basic dimensions

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 +/- 5.2
315 < / <= 400 +/- 5.7
400 < / <= 500 +/- 6.3
500 < / <= 630 +/- 7
630 < / <= 800 +/- 8
800 < / <= 1000 +/- 9
1000 < / <= 1250 +/- 10.5
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