M6 Acorn Nut (Cap Nut), DIN 1587

For M6 × 1 threads: an M6 acorn nut to DIN 1587, 10 mm across the flats and 12 mm high. Download it as simplified and threaded STEP files.

How these parts are made, and what the levels mean: read the method

• Also searched as: M6 acorn nut
• Model id: din1587-m6
• Standard: DIN 1587:2000 · thread M6 × 1, ISO metric coarse, right hand

Files

Part key	Simplified	Threaded
din1587-m6	STEP	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
P	Thread pitch		1		1	nominal	L1
dk	Dome diameter			9.5	9.5	single limit (max), modeled at the limit	L1
h	Overall height	11.57	12	12	12	nominal	L1
m	Hex height	4.7		5	4.85	midpoint of min–max	L1
mw	Wrenching height	3.76			3.76	single limit (min), modeled at the limit	L0 (min: one source)
s	Width across flats	9.78	10	10	10	nominal	L1
e	Width across corners	11.05			11.05	single limit (min), modeled at the limit	L1
r	Dome radius		4.75 ref		4.75	reference value	L1
t	Bore depth	7.71		8.29	8	midpoint of min–max	L1
x	Thread run-out			2	2	single limit (max), modeled at the limit	L1
w	Dome wall thickness	2			2	single limit (min), modeled at the limit	L1
da	Countersink diameter	6		6.75	6.375	midpoint of min–max	L0 (min, max: one source)
dw	Bearing face diameter	8.9			8.9	single limit (min), modeled at the limit	L0 (min: one source)
beta	Chamfer angle	15		30	22.5	midpoint of min–max	L0 (min, max: one source)
theta	Countersink angle		120		120	nominal	L0 (nom: one source)
P	Coarse thread pitch		1		1	nominal	L1
tap_drill	Tap drill diameter		5		5	nominal	L1
d1	Basic minor diameter		4.917468		4.917468	nominal	L1
ch_angle	Chamfered end angle			50	50	single limit (max), modeled at the limit	L2
dh_fine	Clearance hole, fine series		6.4		6.4	nominal	L1
dh_medium	Clearance hole, medium series		6.6		6.6	nominal	L1
dh_coarse	Clearance hole, coarse series		7		7	nominal	L1

Thread and holes

• Tap drill: 5 mm (method: d − P), L1, sources amesweb-tap-drill, rule-tap-drill.
• Clearance hole (ISO 273): close 6.4, normal 6.6, loose 7 mm (L1: fine, medium and coarse series (albany-clearance, wikipedia-de-clearance)).

Drawing

As a PDF: CC-DIN1587-SZ-M6.pdf.

Goes with the M6 acorn nut

• Spanner: 10 mm, the hexagon's nominal width across flats (s) in the table above.
• ISO 4762 socket head cap screw in 12 lengths from 10 to 60 mm, the same size as this M6 acorn nut: M6 Socket Head Cap Screw (Allen Bolt), ISO 4762 / DIN 912
• ISO 4017 hex head screw in 11 lengths from 12 to 60 mm, the same size as this M6 acorn nut: M6 Hex Head Screw (Hex Bolt), ISO 4017
• ISO 7089 flat washer, the same size as this M6 acorn nut: M6 Flat Washer (Plain Washer), ISO 7089

The M6 acorn nut beside the M5 and the M8

The M6 is number 3, counting from the smallest, of the 4 DIN 1587 acorn nuts published here, from M4 to M8.

• Thread pitch (P): 1 mm on the M6 acorn nut, against 0.8 mm on the M5 and 1.25 mm on the M8.
• Dome diameter (dk): up to 9.5 mm on the M6 acorn nut, against up to 7.5 mm on the M5 and up to 12.5 mm on the M8.
• Overall height (h): 12 mm on the M6 acorn nut, against 10 mm on the M5 and 15 mm on the M8.
• Hex height (m): 4.7 to 5 mm on the M6 acorn nut, against 3.7 to 4 mm on the M5 and 6.14 to 6.5 mm on the M8.
• Wrenching height (mw): at least 3.76 mm on the M6 acorn nut, against at least 2.96 mm on the M5 and at least 4.91 mm on the M8.
• Width across flats (s): 10 mm on the M6 acorn nut, against 8 mm on the M5 and 13 mm on the M8.
• Width across corners (e): at least 11.05 mm on the M6 acorn nut, against at least 8.79 mm on the M5 and at least 14.38 mm on the M8.
• Dome radius (r): 4.75 mm (reference) on the M6 acorn nut, against 3.75 mm (reference) on the M5 and 6.25 mm (reference) on the M8.

Other sizes

• One size smaller: M5 Acorn Nut (Cap Nut), DIN 1587, 8 mm across flats.
• One size larger: M8 Acorn Nut (Cap Nut), DIN 1587, 13 mm across flats.

Documents

• CC-DIN1587-DS-M6.pdf: M6 datasheet: values with levels, sources
• CC-DIN1587-SZ-M6.pdf: M6 drawing: this size's values on the views
• parts.json: the part record of this size (the platform contract)

Sources

albany-clearance, amesweb-tap-drill, fasten-it-din1587, fasteners-eu-din1587, fasteners-eu-din1587-drawing, iso4753-2011-sample, rule-basic-minor, rule-iso4759-1-nut-height, rule-tap-drill, schrauben-lexikon-din1587, wikipedia-de-clearance, wikipedia-iso261. Full citations: the method page and this size's datasheet.

Found an error? Use the feedback section on this page.