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Applications & Selection Guide
ISO 898-1 class 8.8 hex flange bolts to DIN 6921 / EN 1665. A washer flange under the hex head spreads load; some lots are serrated for extra resistance to rotation. Metric coarse, listed M4–M12.
Common in automotive, agricultural machinery, HVAC, and sheet-metal frames where a separate washer would slow assembly. Class 8.8 is the default. The flange is not a DIN 6916 HV washer and these are not structural HV bolts. For a nut with a matching flange see DIN 6923 class 8.
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Technical guides
Flange dimensions: EN 1092-1 PN6 to PN40 and ASME B16.5 Class 150 and 300
Flange dimension tables for EN 1092-1 PN6, PN10, PN16, PN25 and PN40 and ASME B16.5 Class 150 and 300: outside diameter, bolt circle, number and size of bolts, and why PN and Class flanges do not mate.
Read the guide →Bolt grades and sizes: 8.8, 10.9, 12.9, A2 and A4, and metric hex bolt dimensions
What the property classes 4.8, 8.8, 10.9 and 12.9 and stainless A2-70 and A4-70 mean, minimum strength and tensile loads, metric thread pitch and hex head sizes, DIN 933 vs DIN 931, and which nut goes with which bolt.
Read the guide →Product Information
Material Grade
ISO 898-1 class 8.8
Manufacturing Standard
DIN 6921 / EN 1665
Material Type
Steel
Category
Flange Hex Bolt
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