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Fastener Insights

November 10, 2026
Elevator Bolt Types: DIN 15237, Norway, Fanged and Easifit Compared
Head shape is a consequence, not the choice. How Norway No. 1, No. 3 Eclipse, fanged, Ref 70, DIN 15237 Euro and Easifit bolts hold themselves still, and what each needs from the belt and bucket.
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November 10, 2026
How to Determine Tightening Torque for DIN EN 1665 Flange Bolts
A torque value is a joint decision, not a bolt property. How clamp force, thread and flange friction, bearing diameter and tightening method determine the tightening torque for EN 1665 flange bolts.
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November 10, 2026
DIN 6921 Bolts and DIN 6923 Flange Nuts: How to Check Compatibility
The two DIN references were replaced by EN 1665 and EN 1661, but that says nothing about whether a given bolt and nut work together. The six checks to run before a replacement pair is accepted.
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November 8, 2026
What Are Hex Flange Bolts? Uses, Types, and How They Work
An integral flange turns the bolt head into a washer-sized bearing surface. What that changes in the joint, where it stops helping, and how plain and serrated faces differ.
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