M5 Flange Nut (Hex Flange Nut), DIN 6923

Across the flats an M5 flange nut (DIN 6923) measures 8 mm, and it stands 4.7 to 5 mm tall on the M5 × 0.8 thread. Its flange is up to 11.8 mm in diameter. It comes as simplified and threaded STEP files.

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

• Also searched as: M5 nut
• Model id: din6923-m5
• Standard: DIN 6923:1983 · thread M5 × 0.8, ISO metric coarse, right hand

Files

Part key	Simplified	Threaded
din6923-m5	STEP	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
P	Thread pitch		0.8		0.8	nominal	L1
c	Flange thickness	1			1	single limit (min), modeled at the limit	L1
da	Countersink diameter	5		5.75	5.375	midpoint of min–max	L1
dc	Flange diameter			11.8	11.8	single limit (max), modeled at the limit	L1
dw	Bearing face diameter	9.8			9.8	single limit (min), modeled at the limit	L1
e	Width across corners	8.79			8.79	single limit (min), modeled at the limit	L1
m	Nut height	4.7		5	4.85	midpoint of min–max	L1
mw	Wrenching height	2.2			2.2	single limit (min), modeled at the limit	L1
s	Width across flats	7.78	8	8	7.89	midpoint of min–max	L1
r	Flange fillet radius			0.3	0.3	single limit (max), modeled at the limit	L1
P	Coarse thread pitch		0.8		0.8	nominal	L1
tap_drill	Tap drill diameter		4.2		4.2	nominal	L1
d1	Basic minor diameter		4.1339744		4.1339744	nominal	L1
ch_angle	Chamfered end angle			50	50	single limit (max), modeled at the limit	L2
dh_fine	Clearance hole, fine series		5.3		5.3	nominal	L1
dh_medium	Clearance hole, medium series		5.5		5.5	nominal	L1
dh_coarse	Clearance hole, coarse series		5.8		5.8	nominal	L1

Thread and holes

• Tap drill: 4.2 mm (method: d − P), L1, sources amesweb-tap-drill, rule-tap-drill.
• Clearance hole (ISO 273): close 5.3, normal 5.5, loose 5.8 mm (L1: fine, medium and coarse series (albany-clearance, wikipedia-de-clearance)).

Drawing

As a PDF: CC-DIN6923-SZ-M5.pdf.

Goes with the M5 flange nut

• Spanner: 8 mm, the hexagon's nominal width across flats (s) in the table above.
• ISO 4762 socket head cap screw in 11 lengths from 8 to 50 mm, the same size as this M5 flange nut: M5 Socket Head Cap Screw (Allen Bolt), ISO 4762 / DIN 912
• ISO 4017 hex head screw in 10 lengths from 10 to 50 mm, the same size as this M5 flange nut: M5 Hex Head Screw (Hex Bolt), ISO 4017
• ISO 7089 flat washer, the same size as this M5 flange nut: M5 Flat Washer (Plain Washer), ISO 7089

The M5 flange nut beside the M6

The M5 is the smallest of the 3 DIN 6923 flange nuts published here, from M5 to M8.

• Thread pitch (P): 0.8 mm on the M5 flange nut, against 1 mm on the M6.
• Flange thickness (c): at least 1 mm on the M5 flange nut, against at least 1.1 mm on the M6.
• Countersink diameter (da): 5 to 5.75 mm on the M5 flange nut, against 6 to 6.75 mm on the M6.
• Flange diameter (dc): up to 11.8 mm on the M5 flange nut, against up to 14.2 mm on the M6.
• Bearing face diameter (dw): at least 9.8 mm on the M5 flange nut, against at least 12.2 mm on the M6.
• Width across corners (e): at least 8.79 mm on the M5 flange nut, against at least 11.05 mm on the M6.
• Nut height (m): 4.7 to 5 mm on the M5 flange nut, against 5.7 to 6 mm on the M6.
• Wrenching height (mw): at least 2.2 mm on the M5 flange nut, against at least 3.1 mm on the M6.

Other sizes

• One size larger: M6 Flange Nut (Hex Flange Nut), DIN 6923, 10 mm across flats.

Documents

• CC-DIN6923-DS-M5.pdf: M5 datasheet: values with levels, sources
• CC-DIN6923-SZ-M5.pdf: M5 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-din6923, fasteners-eu-din6923, globalfastener-din6923, 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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