CC-DINSS7-DS-M8 revA Size datasheet - M8
'?) CommunityCAD
DIN 557 M8 square nut
Size datasheet: this size's values with their levels, conventions and sources.
Thread M8 x 1.25, ISO metric coarse, right hand Part key din557-m8 Files 2 STEP AP214 (simplified + —o threaded)
Simplified - M8, front view, 2:1 Threaded - M8, front view, 2:1 Sym. Dimension Value Level P Thread pitch 1.25 L1- 3 s Width across flats 12.785 L1- 2 12.57-13 e Width across corners 17.37 l1 +2 16.34-18.4 m Nut height 6.21 L1- 2 5.92-6.5 mw Height at the corners >4.1 L1- 3 dw Bearing face diameter > 11.5 L1- 3 B Chamfer angle, deg 22.5% lo -1 15-30 D1 Basic minor diameter (crests) 6.6468 L1- 2 tap Tap drill (method D - P) 6.75 Li + 2
Modeled value: nominal, else the midpoint of min-max. s / =: only that limit is given. * amber: one source (LO). c: a source value was corrected. Level - independent sources. e follows from s and is checked against its limits; dw min sets the chamfer's face circle; mw min is checked at the corners.
DIN 557:1994-01 - ISO 68-1/1SO 261 (thread) Page 1/2 Square nut - M8 - both detail levels - Dimensions in mm - CC-BY 4.0, lronPixel Labs LLC spec 82d0e3f1e4052a4ec559d0F9Fd7b4cF7b5772671
Modeled from cited sources; not certified. Found an error? Use the feedback section on the part page.
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CC-DINSS7-DS-M8 revA Size datasheet - M8
'?) CommunityCAD
Conventions
e Square: sharp at the modeled s (the middle of its band), one corner on +X.
« Corner chamfer on the bearing face only: a cone at B (range midpoint) meeting the face on (dw min + s) / 2. Not specified by the standard. « No countersink on either face.
¢ Bore: plain at D (simplified); ISO 68-1 basic internal thread over the full height (threaded), running out at both faces.
« Sharp edges, no markings. Values given only as a limit are modeled at that limit. Features the standard does not dimension are house conventions.
Sources
Source Publisher Retrieved sha256
amesweb-tap-drill AMESweb 2026-10-23 e6501cc1414a
pule-tap-drill CommunityCAD 2026-10-23 625b582c306e
pule-basic-minor CommunityCAD 2026-10-23 00329692204
fasten-it-dinS57 fasten.it 2026-10-26 11a73792f2a2
fasteners-eu-dinS57 fasteners.eu 2026-10-26 41803ea3b367 fasteners-eu-din557-drawing fasteners.eu 2026-10-27 4cd61765bd8f (kept outside the repo) krepcom-din557 Krepcom (translation by MALUKPENEK) 2026-10-27 dai1c0219896a (kept outside the repo)
The whole series (verification map, corrections, drawings): CC-DIN557-DS.
DIN 557:1994-01 - ISO 68-1/1SO 261 (thread) Page 2/2 Square nut - M8 - both detail levels - Dimensions in mm - CC-BY 4.0, lronPixel Labs LLC spec 82d0e3f1e4052a4ec559d0F9Fd7b4cF7b5772671
Modeled from cited sources; not certified. Found an error? Use the feedback section on the part page.