DIN 6921 · M10 · Widths across flats in mm

For DIN 6921, size is M10; dimension that differs is Widths across flats in mm; iso standard is EN 1665; din value is 15; iso value is 16, verified against its source on 2026-10-12.

What the source says

ISO standard, DIN value and ISO value

The source prints these values inside the passage below but does not name them there. The passage shows where each one appears; what ties them to this record is the position on the page, not anything the passage says.

Widths across flats in mm for hexagon head bolts for hexagon head bolts (normal series according to ISO 272) DIN 558 ISO 4018 DIN 601 ISO 4016 DIN 931 ISO 4014 Nominal Ø DIN 6921 EN 1665 DIN 933 ISO 4017 DIN 960 ISO 8765 DIN 961 ISO 8676 M1.6 3.2 3.2 – – M2 4 4 – – M2.5 5 5 – – M3 5.5 5.5 – – M4 7 7 – – M5 8 8 8 8 M6 10 10 10 10 M8 13 13 13 13 M10 17 16 15 16

— wurthindustry.ca, retrieved 2026-09-22

Source

• wurthindustry.cahttps://www.wurthindustry.ca/media/downloads/wic_pdfs/Fasteners_DIN-EN-ISO_Standards.pdf

Last verified against source: 2026-10-12. Due for re-check by 2029-10-11. This page as Markdown · OKF bundle · full dataset as JSON.