M8 Thin Square Nut (Square Thin Nut), DIN 562

Across the flats an M8 thin square nut (DIN 562) measures 13 mm, and it stands 4 mm tall on the M8 × 1.25 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: M8 thin square nut
• Model id: din562-m8
• Standard: DIN 562:2013 · thread M8 × 1.25, ISO metric coarse, right hand

Files

Part key	Simplified	Threaded
din562-m8	STEP	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
s	Width across flats	12.57	13	13	12.785	midpoint of min–max	L1
m	Nut height	3.52	4	4	3.76	midpoint of min–max	L1
e	Width across corners	16.5			16.5	single limit (min), modeled at the limit	L1
P	Coarse thread pitch		1.25		1.25	nominal	L1
tap_drill	Tap drill diameter		6.75		6.75	nominal	L1
d1	Basic minor diameter		6.646835		6.646835	nominal	L1
ch_angle	Chamfered end angle			50	50	single limit (max), modeled at the limit	L2
dh_fine	Clearance hole, fine series		8.4		8.4	nominal	L1
dh_medium	Clearance hole, medium series		9		9	nominal	L1
dh_coarse	Clearance hole, coarse series		10		10	nominal	L1

Thread and holes

• Tap drill: 6.75 mm (method: d − P), L1, sources amesweb-tap-drill, rule-tap-drill.
• Clearance hole (ISO 273): close 8.4, normal 9, loose 10 mm (L1: fine, medium and coarse series (albany-clearance, wikipedia-de-clearance)).

Drawing

As a PDF: CC-DIN562-SZ-M8.pdf.

Goes with the M8 thin square nut

• Spanner: 13 mm, the hexagon's nominal width across flats (s) in the table above.
• ISO 4762 socket head cap screw in 14 lengths from 12 to 80 mm, the same size as this M8 thin square nut: M8 Socket Head Cap Screw (Allen Bolt), ISO 4762 / DIN 912
• ISO 4017 hex head screw in 13 lengths from 16 to 80 mm, the same size as this M8 thin square nut: M8 Hex Head Screw (Hex Bolt), ISO 4017
• ISO 7089 flat washer, the same size as this M8 thin square nut: M8 Flat Washer (Plain Washer), ISO 7089

The M8 thin square nut beside the M6

The M8 is the largest of the 7 DIN 562 thin square nuts published here, from M2 to M8.

• Width across flats (s): 13 mm on the M8 thin square nut, against 10 mm on the M6.
• Nut height (m): 4 mm on the M8 thin square nut, against 3.2 mm on the M6.
• Width across corners (e): at least 16.5 mm on the M8 thin square nut, against at least 12.7 mm on the M6.
• Coarse thread pitch (P): 1.25 mm on the M8 thin square nut, against 1 mm on the M6.
• Tap drill diameter (tap_drill): 6.75 mm on the M8 thin square nut, against 5 mm on the M6.
• Basic minor diameter (d1): 6.646835 mm on the M8 thin square nut, against 4.917468 mm on the M6.
• Chamfered end angle (ch_angle): up to 50° on the M8 thin square nut, the same on the M6.
• Clearance hole, fine series (dh_fine): 8.4 mm on the M8 thin square nut, against 6.4 mm on the M6.

Other sizes

• One size smaller: M6 Thin Square Nut (Square Thin Nut), DIN 562, 10 mm across flats.

Documents

• CC-DIN562-DS-M8.pdf: M8 datasheet: values with levels, sources
• CC-DIN562-SZ-M8.pdf: M8 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, cde-din562, fasten-it-din562, fasteners-eu-din562, iso4753-2011-sample, rule-basic-minor, rule-iso4759-1-nut-height-din562, rule-iso4759-1-nut-width-din562, rule-tap-drill, wegertseder-din562, 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.