DIN EN 1665 Hexagon Flange Bolts-Heavy Series
Product: DIN EN 1665 Hexagon Flange Bolts-Heavy Series
Property Class:4.6,4.8,5.6,5.8,8.8,10.9,12.9,
A2-70, A4-70,A4-80
Finish:Zinc Plating(Yellow Zinc, Zinc Blue, Rinse Color), Black, Phosphate & Oil, Zinc Phosphate, Hot-dip Galvanized(HDG),Dacromet, Geomet
Material:Steel
Export country: USA, Japan, Australia, Europe and so on
Support customer customization
DIN EN 1665 heavy-duty hexagonal flange bolt is a kind of fastener, mainly composed of hexagonal head, flange plate and screw rod. Heavy-duty hex flange bolts have some unique advantages over regular bolts. First, the flange part has a thinner part that can be slightly deformed to make the connection stronger. Secondly, because the bolt head is small and the flange has a tightening effect, it can be used safely even on softer, non-wear-resistant materials without causing punctures. Additionally, because flange bolts have smaller heads, they can be easily installed into the holes using specialized tools, similar to how hexagon socket head bolts are installed.
Pictures



Product drawing
Product Specification
Size | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M20 | |
P | 0.8 | 1.0 | 1.25 | 1.5 | 1.75 | 2.0 | 2.0 | 2.5 | |
b | l<125 | 16 | 18 | 22 | 26 | 30 | 34 | 38 | 46 |
125<l<200 | / | / | 28 | 32 | 36 | 40 | 44 | 52 | |
l>200 | / | / | / | / | / | / | 57 | 65 | |
c min | 1 | 1.1 | 1.2 | 1.5 | 1.8 | 2.1 | 2.4 | 3.0 | |
da | Type F | 5.7 | 6.8 | 9.2 | 11.2 | 13.7 | 15.7 | 17.7 | 22.4 |
Type U | 6.2 | 7.5 | 10.0 | 12.5 | 15.2 | 17.7 | 20.5 | 25.7 | |
dc max | 11.8 | 14.2 | 18.0 | 22.3 | 26.6 | 30.5 | 35.0 | 43.0 | |
ds | max | 5.0 | 6.0 | 8.0 | 10.0 | 12.0 | 14.0 | 16.0 | 20.0 |
min | 4.82 | 5.82 | 7.78 | 9.78 | 11.73 | 13.73 | 15.73 | 19.67 | |
dv max | 5.5 | 6.6 | 8.8 | 10.8 | 12.8 | 14.8 | 17.2 | 21.6 | |
dw min | 9.8 | 12.2 | 15.8 | 19.6 | 23.8 | 27.6 | 31.9 | 39.9 | |
e min | 8.71 | 10.95 | 14.26 | 17.62 | 19.86 | 23.15 | 26.51 | 33.23 | |
k max | 5.8 | 6.6 | 8.1 | 10.4 | 11.8 | 13.7 | 15.4 | 18.9 | |
kw min | 2.6 | 3.0 | 3.9 | 5.1 | 5.6 | 6.5 | 7.3 | 8.9 | |
lf max | 1.4 | 1.6 | 2.1 | 2.1 | 2.1 | 2.1 | 3.2 | 4.2 | |
r1 min | 0.2 | 0.25 | 0.4 | 0.4 | 0.6 | 0.6 | 0.6 | 0.8 | |
r2 max | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 | 0.9 | 1.0 | 1.2 | |
r3 | max | 0.25 | 0.26 | 0.36 | 0.45 | 0.54 | 0.63 | 0.72 | 0.9 |
min | 0.10 | 0.11 | 0.16 | 0.20 | 0.24 | 0.28 | 0.32 | 0.4 | |
r4 | 4.0 | 4.4 | 5.7 | 5.7 | 5.7 | 5.7 | 8.8 | 11.4 | |
s | max | 8.0 | 10.0 | 13.0 | 16.0 | 18.0 | 21.0 | 24.0 | 30.0 |
min | 7.78 | 9.78 | 12.73 | 15.73 | 17.73 | 20.67 | 23.67 | 29.67 | |
v | max | 0.15 | 0.20 | 0.25 | 0.30 | 0.35 | 0.45 | 0.50 | 0.65 |
min | 0.05 | 0.05 | 0.1 | 0.15 | 0.15 | 0.2 | 0.25 | 0.30 | |
Support customer customization | |||||||||
Some introduction about our company
Application
Certification
Workshop
Service
Jinan Star supplies heavy-duty hexagonal flange bolts conforming to DIN EN 1665, with a full range of options in dimensions, materials and property classes.
Custom manufacturing is available for clients requiring non-standard dimensions, materials or mechanical performance to meet specific project requirements.
Backed by a mature logistics network, Jinan Star ensures fast, precise shipment to customers’ specified destinations.







