CC-DIN7984-DS-M8 rev A Size datasheet - M8
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DIN 7984 MB8 low head socket cap screw
Size datasheet: this size's values with their levels, its lengths, conventions and sources.
Thread M8 x 1.25, ISO metric coarse, right hand
Lengths 14 generated, | = 16-100
Files 28 STEP AP214 (simplified + threaded)
Simplified - M8x20, front view, 2:1 Threaded - M8x20, front view, 2:1 Sym. Dimension Value Level P Thread pitch 1.25 La - 3 dk Head diameter 12.865 1-3 12.73-13 k Head height 4.91 L1- 3 4,82-5 s Socket across flats 5.08 L1- 3 5.02-5.14 e Socket across corners > 5.72 L1- 3 t Socket depth 3.8 L1-4 3.65-3.95 Vv Head top chamfer < 0.8% LO: 1 r Underhead fillet radius 0.5* LO: 1 0.4-0.6 ds Shank diameter 7.89c L1- 3 7.78-8 da Transition diameter < 9.2 L1- 2 dw Bearing face diameter > 12.03* lo-41 b Thread length 22 ref L1-4 di Basic minor diameter (end face) 6.6468 L1- 2 tap Tap drill (method d - P) 6.75 L1- 2 a End chamfer angle, deg
Modeled value: nominal, else the midpoint of min-max. s / =: only that limit is given, modeled at the limit. * amber: one source (LO). c: a source value was corrected. Level - independent sources.
DIN 7984:2022 - ISO 4753:2011 (ends) - ISO 68-1/ ISO 261 (thread) Page 1/2 Low head socket cap screw - MB - 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-DIN7984-DS-M8 rev A Size datasheet - M8
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Lengths | Thread Is Ig Part key 16 tothe head - - din7984-m8x16 20 tothe head - - din7984-m8x20 25 tothe head - - din7984-m8x25 30 tothe head - - din7984-m8x30 35 partial 2 6.75 $13 din7984-m8x35 40 partial > 11.75 < 18 din7984-m8x40 45 partial 2 16.75 < 23 din7984-m8x45 50 partial 2 21.75 < 28 din7984-m8x50 55 partial > 26.75 < 33. din7984-m8x55 60 partial 2 31.75 < 38 din7984-m8x60 70 partial 2 41.75 < 48 din7984-m8x70 80 partial 2 51.75 < 58 din7984-m8x80 90 partial 2 61.75 < 68 din7984-m8x90 100 partial 2 71.75 < 78 din7984-m8x100
Is = plain shank (min), Ig = bearing face to the first full thread (max). To the head: full thread up to the printed Ig max from the bearing face. Is and Ig are one source (fasteners.eu), or past its table Ig = | - b, Is = Ig - 5P (owner decision #823); both LO. Listed by one source only, not generated: |= 8,10, 12, 14, 18, 110, 120.
Conventions
e End: ISO 4753 chamfered end (CH), end face at d1, chamfer at the angle limit.
* Socket: regular hexagon at the modeled s, sharp corners, one corner on +X, flat floor at t.
« Head: plain cylinder at dk, 45° top chamfer at v max, underside edge rounded above dw min; the same on both levels. ¢ Thread (threaded level): ISO 68-1 basic profile; full thread to Ig, quarter-turn fade toward the head.
« 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
iso4753-2011-sample ISO (preview published by iTeh n/a 7526d25f9381 (kept outside the repo) Standards)
fasten-it-din7984 fasten.it 2026-10-25 6d7c2d071779
fasteners-eu-din7984 fasteners.eu 2026-10-25 Oca229b3badf
fasteners-eu-din7984-lengths fasteners.eu 2026-10-25 Oca229b3badf
pule-din7984-1g CommunityCAD 2026-10-27 12fded2béaca
globalfastener-din7984 globalfastener.com (Internet Archive 2026-10-25 lebfc356fcb2 copy, captured 2026-05-21)
aspen-din7984 Aspen Fasteners 2026-10-25 a89117360Fd6
aspen-din7984-pages Aspen Fasteners 2026-10-26 2c952dad2f07
The whole series (verification map, corrections, drawings): CC-DIN7984-DS.
DIN 7984:2022 - ISO 4753:2011 (ends) - ISO 68-1/ ISO 261 (thread) Page 2/2 Low head socket cap screw - MB - 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.