M3 Thin Square Nut (Square Thin Nut), DIN 562

For M3 × 0.5 threads: an M3 thin square nut to DIN 562, 5.5 mm across the flats and 1.8 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: M3 thin square nut
• Model id: din562-m3
• Standard: DIN 562:2013 · thread M3 × 0.5, ISO metric coarse, right hand

Files

Part key	Simplified	Threaded
din562-m3	STEP	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
s	Width across flats	5.2	5.5	5.5	5.35	midpoint of min–max	L1
m	Nut height	1.4	1.8	1.8	1.6	midpoint of min–max	L1
e	Width across corners	7			7	single limit (min), modeled at the limit	L1
P	Coarse thread pitch		0.5		0.5	nominal	L1
tap_drill	Tap drill diameter		2.5		2.5	nominal	L1
d1	Basic minor diameter		2.458734		2.458734	nominal	L1
ch_angle	Chamfered end angle			50	50	single limit (max), modeled at the limit	L2
dh_fine	Clearance hole, fine series		3.2		3.2	nominal	L1
dh_medium	Clearance hole, medium series		3.4		3.4	nominal	L1
dh_coarse	Clearance hole, coarse series		3.6		3.6	nominal	L1

Thread and holes

• Tap drill: 2.5 mm (method: d − P), L1, sources amesweb-tap-drill, rule-tap-drill.
• Clearance hole (ISO 273): close 3.2, normal 3.4, loose 3.6 mm (L1: fine, medium and coarse series (albany-clearance, wikipedia-de-clearance)).

Drawing

As a PDF: CC-DIN562-SZ-M3.pdf.

Goes with the M3 thin square nut

• Spanner: 5.5 mm, the hexagon's nominal width across flats (s) in the table above.
• ISO 4762 socket head cap screw in 9 lengths from 5 to 30 mm, the same size as this M3 thin square nut: M3 Socket Head Cap Screw (Allen Bolt), ISO 4762 / DIN 912
• ISO 4017 hex head screw in 8 lengths from 6 to 30 mm, the same size as this M3 thin square nut: M3 Hex Head Screw (Hex Bolt), ISO 4017
• ISO 7089 flat washer, the same size as this M3 thin square nut: M3 Flat Washer (Plain Washer), ISO 7089

The M3 thin square nut beside the M2.5 and the M4

The M3 is number 3, counting from the smallest, of the 7 DIN 562 thin square nuts published here, from M2 to M8.

• Width across flats (s): 5.5 mm on the M3 thin square nut, against 5 mm on the M2.5 and 7 mm on the M4.
• Nut height (m): 1.8 mm on the M3 thin square nut, against 1.6 mm on the M2.5 and 2.2 mm on the M4.
• Width across corners (e): at least 7 mm on the M3 thin square nut, against at least 6.3 mm on the M2.5 and at least 8.9 mm on the M4.
• Coarse thread pitch (P): 0.5 mm on the M3 thin square nut, against 0.45 mm on the M2.5 and 0.7 mm on the M4.
• Tap drill diameter (tap_drill): 2.5 mm on the M3 thin square nut, against 2.05 mm on the M2.5 and 3.3 mm on the M4.
• Basic minor diameter (d1): 2.458734 mm on the M3 thin square nut, against 2.0128606 mm on the M2.5 and 3.2422276 mm on the M4.
• Chamfered end angle (ch_angle): up to 50° on the M3 thin square nut, the same on the M2.5 and the M4.
• Clearance hole, fine series (dh_fine): 3.2 mm on the M3 thin square nut, against 2.7 mm on the M2.5 and 4.3 mm on the M4.

Other sizes

• One size smaller: M2.5 Thin Square Nut (Square Thin Nut), DIN 562, 5 mm across flats.
• One size larger: M4 Thin Square Nut (Square Thin Nut), DIN 562, 7 mm across flats.

Documents

• CC-DIN562-DS-M3.pdf: M3 datasheet: values with levels, sources
• CC-DIN562-SZ-M3.pdf: M3 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.