* CC-DIN1587-DS-M8 rev A '?) CommunityCAD Size datasheet - M8
DIN 1587 M8 acorn nut (hexagon domed cap 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 din1587-m8
Files 2 STEP AP214 (simplified + threaded)
Simplified - M8, front view, 1:1 Threaded - M8, front view, 1:1 Sym. Dimensi Value Level
P Thread pitch 1.25 ll - 2
s Width across flats 13 L1 - 3 12.73-13
e Width across corners > 14.38 L1- 2
m Hexagon height 6.32c ll - 2 6.14-6.5
mw Wrenching height > 4.91* lo -1
h Overall height 15 La - 2 14.57-15
dk Dome diameter < 12.5 La - 3
Pr Dome radius 6.25 ref ll - 2
t Bore depth (full diameter) 11.00 ll - 2 10.65-11.35
x Thread run-out < 2.5 L1- 2
w Wall, bore to dome top >2 L1- 2
dw Bearing face diameter > 11.6* lo-1
da Countersink diameter 8.375% lo -1 8-8.75
B Corner chamfer angle, deg 22.5% lo -1 15-30
8 Countersink angle, deg 120* lo -1
D1 Basic minor diameter (crests) 6.6468 L1-2
tap Tap drill (method D - P) 6.75 La - 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 = e min; dw min and dk set the two chamfer circles; mw min is checked at mid-flat, w min on the axis; x is the threaded run-out.
DIN 1587:2000 - ISO 4759-1 (m min) - ISO 68-1 / ISO 261 (thread) Page 1/2 Acorn 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-DIN1587-DS-M8 rev A Size datasheet - M8
'?) CommunityCAD
Conventions
« Hexagon: regular at the modeled s (its nominal), one corner on +X, sharp edges.
« Corner chamfers: a cone at B (range midpoint) at both ends, meeting the bearing face on (dw min + s) / 2 and the hex top face on (dk + s) / 2. Not specified by the standard.
« Dome: a cylinder of dk to h - r, then a hemisphere of r with its top at h.
« Countersink at the bearing face at da (range midpoint) and 0.
« Bore: blind, plain at D to t (simplified); ISO 68-1 basic internal thread, full to t - x and fading over x (threaded), cut by the countersink. It ends in a 120° drill point at the tap drill, which leaves w min.
« No washer face, 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 pule-iso4759-1-nut-height CommunityCAD 2026-10-27 5058ea2d5898
fasten-it-din1587 fasten.it 2026-10-26 27ecd8a57bca
fasteners-eu-din1587 fasteners.eu 2026-10-26 £67e68854e2a schrauben-lexikon-din1587 schrauben -lexikon.de (Wegertseder) 2026-10-26 27cb9268242e fasteners-eu-dini587-drawing fasteners.eu 2026-10-26 beb68a781805 (kept outside the repo)
The whole series (verification map, corrections, drawings): CC-DIN1587-DS.
DIN 1587:2000 - ISO 4759-1 (m min) - ISO 68-1 / ISO 261 (thread) Page 2/2 Acorn 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.