en-14399

High-Strength Structural Bolting Assemblies For Preloading

Mushroom Head Square Neck Bolts / Cup Square Bolts

EN 14399

High-strength structural bolting assemblies for preloading - Part 3: System HR - Hexagon bolt and nut assemblies Dimensions NOTE: The difference between lg and ls should not be less than 1,5 P. Key a Incomplete thread u ≤ 2P b 15° to 30°

Dimension in millimeter Table 2 — Dimensions of bolts a
Thread d M12 (M14)b M16 (M18)b M20 M22 M24 M27 M30 M36
P c 1.8 2.0 2.0 2.5 2.5 2.5 3.0 3.0 3.5 4.0
b (ref.) d 30 34 38 42 46 50 54 60 66 78
e 40 44 48 52 56 60 66 72 84
f 65 69 73 79 85 97
c Max. 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8
Min. 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
da Max. 15.20 17.20 19.20 21.70 24.40 26.40 28.40 32.40 35.40 42.40
ds Max. 12.70 14.70 16.70 18.70 20.84 22.84 24.84 27.84 30.84 37.00
Min. 11.30 13.30 15.30 17.30 19.16 21.16 23.16 26.16 29.16 35.00
dw Max. g g g g g g g g g g
Min. 20.10 22.00 24.90 27.70 29.50 33.30 38.00 42.80 46.60 55.90
e Min. 23.91 26.17 29.56 32.95 35.03 39.55 45.20 50.85 55.37 66.44
k Nom. 7.50 8.80 10.00 11.50 12.50 14.00 15.00 17.00 18.70 22.50
Max. 7.95 9.25 10.75 12.40 13.40 14.90 15.90 17.90 19.75 23.55
Min. 7.05 8.35 9.25 10.60 11.60 13.10 14.10 16.10 17.65 21.45
kw Min. 4.90 5.85 6.50 7.42 8.10 9.20 9.90 11.30 12.40 15.00
r Min. 1.2 1.2 1.2 1.5 1.5 1.5 1.5 2.0 2.0 2.0
s Max. 22 24 27 30 32 36 41 46 50 60
Min. 21.16 23.16 26.16 29.16 31.00 35.00 40.00 45.00 49.00 58.80
 

All data for information purpose only. For more details on product standards or dimensions, please feel free to contact us at info@rachnafasteners.com

   
Logo

Our infrastructure include series of Bolt former both Multi-station imported machines and conventional Indian Heading machines, These machines are capable to Cold forge any Hex head, Round Head or any special part up to M24 diameter.

Contact

RACHNA FASTENERS
No. 671, Industrial Area - B
Ludhiana - 141003 Punjab ( INDIA )

+91-161-5049570, 5011690

+91- 98140 47000