M4 Hex Nut (Hexagon Nut), ISO 4032 / DIN 934

Across the flats an M4 hex nut (ISO 4032) measures 7 mm, and it stands 2.9 to 3.2 mm tall on the M4 × 0.7 thread. It comes as simplified and threaded STEP files.

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

• Also searched as: M4 nut
• Equivalent standards: DIN 934 (as listed by fasteners.eu); the values here are ISO 4032's.
• Model id: iso4032-m4
• Standard: ISO 4032:2012 · thread M4 × 0.7, ISO metric coarse, right hand

Files

Part key	Simplified	Threaded
iso4032-m4	STEP	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
P	Thread pitch		0.7		0.7	nominal	L2
c	Washer face height	0.15		0.4	0.275	midpoint of min–max	L2
da	Countersink diameter	4		4.6	4.3	midpoint of min–max	L2
dw	Bearing face diameter	5.9			5.9	single limit (min), modeled at the limit	L2
e	Width across corners	7.66			7.66	single limit (min), modeled at the limit	L2
m	Nut height	2.9		3.2	3.05	midpoint of min–max	L2
mw	Wrenching height	2.3			2.3	single limit (min), modeled at the limit	L2
s	Width across flats	6.78	7	7	6.89	midpoint of min–max	L2
beta	Chamfer angle	15		30	22.5	midpoint of min–max	L2
theta	Countersink angle	90		120	105	midpoint of min–max	L2
P	Coarse thread pitch		0.7		0.7	nominal	L1
tap_drill	Tap drill diameter		3.3		3.3	nominal	L1
d1	Basic minor diameter		3.2422276		3.2422276	nominal	L1
ch_angle	Chamfered end angle			50	50	single limit (max), modeled at the limit	L2
dh_fine	Clearance hole, fine series		4.3		4.3	nominal	L1
dh_medium	Clearance hole, medium series		4.5		4.5	nominal	L1
dh_coarse	Clearance hole, coarse series		4.8		4.8	nominal	L1

Thread and holes

• Tap drill: 3.3 mm (method: d − P), L1, sources amesweb-tap-drill, rule-tap-drill.
• Clearance hole (ISO 273): close 4.3, normal 4.5, loose 4.8 mm (L1: fine, medium and coarse series (albany-clearance, wikipedia-de-clearance)).

Drawing

As a PDF: CC-ISO4032-SZ-M4.pdf.

Goes with the M4 hex nut

• Spanner: 7 mm, the hexagon's nominal width across flats (s) in the table above.
• ISO 4762 socket head cap screw in 10 lengths from 6 to 40 mm, the same size as this M4 hex nut: M4 Socket Head Cap Screw (Allen Bolt), ISO 4762 / DIN 912
• ISO 4017 hex head screw in 9 lengths from 8 to 40 mm, the same size as this M4 hex nut: M4 Hex Head Screw (Hex Bolt), ISO 4017
• ISO 7089 flat washer, the same size as this M4 hex nut: M4 Flat Washer (Plain Washer), ISO 7089

The M4 hex nut beside the M3 and the M5

The M4 is number 4, counting from the smallest, of the 7 ISO 4032 hex nuts published here, from M2 to M8.

• Thread pitch (P): 0.7 mm on the M4 hex nut, against 0.5 mm on the M3 and 0.8 mm on the M5.
• Washer face height (c): 0.15 to 0.4 mm on the M4 hex nut, against 0.15 to 0.4 mm on the M3 and 0.15 to 0.5 mm on the M5.
• Countersink diameter (da): 4 to 4.6 mm on the M4 hex nut, against 3 to 3.45 mm on the M3 and 5 to 5.75 mm on the M5.
• Bearing face diameter (dw): at least 5.9 mm on the M4 hex nut, against at least 4.6 mm on the M3 and at least 6.9 mm on the M5.
• Width across corners (e): at least 7.66 mm on the M4 hex nut, against at least 6.01 mm on the M3 and at least 8.79 mm on the M5.
• Nut height (m): 2.9 to 3.2 mm on the M4 hex nut, against 2.15 to 2.4 mm on the M3 and 4.4 to 4.7 mm on the M5.
• Wrenching height (mw): at least 2.3 mm on the M4 hex nut, against at least 1.7 mm on the M3 and at least 3.5 mm on the M5.
• Width across flats (s): 7 mm on the M4 hex nut, against 5.5 mm on the M3 and 8 mm on the M5.

Other sizes

• One size smaller: M3 Hex Nut (Hexagon Nut), ISO 4032 / DIN 934, 5.5 mm across flats.
• One size larger: M5 Hex Nut (Hexagon Nut), ISO 4032 / DIN 934, 8 mm across flats.

Documents

• CC-ISO4032-DS-M4.pdf: M4 datasheet: values with levels, sources
• CC-ISO4032-SZ-M4.pdf: M4 drawing: this size's values on the views
• parts.json: the part record of this size (the platform contract)

Sources

albany-clearance, amesweb-iso4032, amesweb-tap-drill, fasten-it-iso4032, fasteners-eu-iso4032, iso4032-2012-sample, iso4753-2011-sample, rule-basic-minor, rule-tap-drill, wikipedia-de-clearance, wikipedia-iso261. Full citations: the method page and this size's datasheet.

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