M4 Nylon Insert Lock Nut (Nylon Lock Nut), ISO 10511

The M4 nylon insert lock nut (ISO 10511) is 6.78 to 7 mm across the flats and 4.52 to 5 mm high. The thread is M4 × 0.7; the files are simplified and threaded STEP files.

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

• Also searched as: M4 nut
• Model id: iso10511-m4
• Standard: ISO 10511:2012 · thread M4 × 0.7, ISO metric coarse, right hand

Files

Part key	Simplified	Threaded
iso10511-m4	STEP	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
P	Thread pitch		0.7		0.7	nominal	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
h	Nut height	4.52		5	4.76	midpoint of min–max	L2
m	Hexagon height	1.95			1.95	single limit (min), modeled at the limit	L2
mw	Wrenching height	1.56			1.56	single limit (min), modeled at the limit	L2
s	Width across flats	6.78		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-ISO10511-SZ-M4.pdf.

Goes with the M4 nylon insert lock nut

• Spanner: 7 mm, the hexagon's maximum 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 nylon insert lock 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 nylon insert lock nut: M4 Hex Head Screw (Hex Bolt), ISO 4017
• ISO 7089 flat washer, the same size as this M4 nylon insert lock nut: M4 Flat Washer (Plain Washer), ISO 7089

The M4 nylon insert lock nut beside the M3 and the M5

The M4 is number 2, counting from the smallest, of the 5 ISO 10511 nylon insert lock nuts published here, from M3 to M8.

• Thread pitch (P): 0.7 mm on the M4 nylon insert lock nut, against 0.5 mm on the M3 and 0.8 mm on the M5.
• Countersink diameter (da): 4 to 4.6 mm on the M4 nylon insert lock 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 nylon insert lock nut, against at least 4.56 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 nylon insert lock nut, against at least 6.01 mm on the M3 and at least 8.79 mm on the M5.
• Nut height (h): 4.52 to 5 mm on the M4 nylon insert lock nut, against 3.42 to 3.9 mm on the M3 and 4.52 to 5 mm on the M5.
• Hexagon height (m): at least 1.95 mm on the M4 nylon insert lock nut, against at least 1.55 mm on the M3 and at least 2.45 mm on the M5.
• Wrenching height (mw): at least 1.56 mm on the M4 nylon insert lock nut, against at least 1.24 mm on the M3 and at least 1.96 mm on the M5.
• Width across flats (s): 6.78 to 7 mm on the M4 nylon insert lock nut, against 5.32 to 5.5 mm on the M3 and 7.78 to 8 mm on the M5.

Other sizes

• One size smaller: M3 Nylon Insert Lock Nut (Nylon Lock Nut), ISO 10511, 5.32 to 5.5 mm across flats.
• One size larger: M5 Nylon Insert Lock Nut (Nylon Lock Nut), ISO 10511, 7.78 to 8 mm across flats.

Documents

• CC-ISO10511-DS-M4.pdf: M4 datasheet: values with levels, sources
• CC-ISO10511-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-tap-drill, fasten-it-iso10511, iso10511-2012-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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