M5 Nylon Insert Lock Nut (Nylon Lock Nut), ISO 10511

For M5 × 0.8 threads: an M5 nylon insert lock nut to ISO 10511, 7.78 to 8 mm across the flats and 4.52 to 5 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: M5 nut
• Model id: iso10511-m5
• Standard: ISO 10511:2012 · thread M5 × 0.8, ISO metric coarse, right hand

Files

Part key	Simplified	Threaded
iso10511-m5	STEP	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
P	Thread pitch		0.8		0.8	nominal	L2
da	Countersink diameter	5		5.75	5.375	midpoint of min–max	L2
dw	Bearing face diameter	6.9			6.9	single limit (min), modeled at the limit	L2
e	Width across corners	8.79			8.79	single limit (min), modeled at the limit	L2
h	Nut height	4.52		5	4.76	midpoint of min–max	L2
m	Hexagon height	2.45			2.45	single limit (min), modeled at the limit	L2
mw	Wrenching height	1.96			1.96	single limit (min), modeled at the limit	L2
s	Width across flats	7.78		8	7.89	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		0.8		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-ISO10511-SZ-M5.pdf.

Goes with the M5 nylon insert lock nut

• Spanner: 8 mm, the hexagon's maximum 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 nylon insert lock 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 nylon insert lock nut: M5 Hex Head Screw (Hex Bolt), ISO 4017
• ISO 7089 flat washer, the same size as this M5 nylon insert lock nut: M5 Flat Washer (Plain Washer), ISO 7089

The M5 nylon insert lock nut beside the M4 and the M6

The M5 is number 3, counting from the smallest, of the 5 ISO 10511 nylon insert lock nuts published here, from M3 to M8.

• Thread pitch (P): 0.8 mm on the M5 nylon insert lock nut, against 0.7 mm on the M4 and 1 mm on the M6.
• Countersink diameter (da): 5 to 5.75 mm on the M5 nylon insert lock nut, against 4 to 4.6 mm on the M4 and 6 to 6.75 mm on the M6.
• Bearing face diameter (dw): at least 6.9 mm on the M5 nylon insert lock nut, against at least 5.9 mm on the M4 and at least 8.9 mm on the M6.
• Width across corners (e): at least 8.79 mm on the M5 nylon insert lock nut, against at least 7.66 mm on the M4 and at least 11.05 mm on the M6.
• Nut height (h): 4.52 to 5 mm on the M5 nylon insert lock nut, against 4.52 to 5 mm on the M4 and 5.52 to 6 mm on the M6.
• Hexagon height (m): at least 2.45 mm on the M5 nylon insert lock nut, against at least 1.95 mm on the M4 and at least 2.9 mm on the M6.
• Wrenching height (mw): at least 1.96 mm on the M5 nylon insert lock nut, against at least 1.56 mm on the M4 and at least 2.32 mm on the M6.
• Width across flats (s): 7.78 to 8 mm on the M5 nylon insert lock nut, against 6.78 to 7 mm on the M4 and 9.78 to 10 mm on the M6.

Other sizes

• One size smaller: M4 Nylon Insert Lock Nut (Nylon Lock Nut), ISO 10511, 6.78 to 7 mm across flats.
• One size larger: M6 Nylon Insert Lock Nut (Nylon Lock Nut), ISO 10511, 9.78 to 10 mm across flats.

Documents

• CC-ISO10511-DS-M5.pdf: M5 datasheet: values with levels, sources
• CC-ISO10511-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-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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