3 mm Hex Key (Allen Key), ISO 2936

3 mm across flats, with a long arm of 66 mm and a short arm of 23 mm: the 3 mm hex key (ISO 2936), as simplified STEP files.

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

• Also searched as: 3 mm hex key
• Model id: iso2936-s3
• Standard: ISO 2936:2014 · size 3 mm

Files

Part key	Simplified
iso2936-s3	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
s	Width across flats	2.96	3	3	2.98	midpoint of min–max	L2
e	Width across corners	3.31		3.39	3.35	midpoint of min–max	L2
l1	Long arm length, standard		66		66	nominal	L2
l1_lim	Long arm length, standard, limits	62		66	64	midpoint of min–max	L2
l1_long	Long arm length, long		93		93	nominal	L2
l1_long_lim	Long arm length, long, limits	89		93	91	midpoint of min–max	L2
l1_xlong	Long arm length, extra-long		129		129	nominal	L2
l1_xlong_lim	Long arm length, extra-long, limits	125		129	127	midpoint of min–max	L2
l2	Short arm length		23		23	nominal	L2
l2_lim	Short arm length, limits	21		23	22	midpoint of min–max	L2

Drawing

As a PDF: CC-ISO2936-SZ-3.pdf.

The 3 mm hex key beside the 2.5 mm and the 4 mm

The 3 mm is number 4, counting from the smallest, of the 7 ISO 2936 hex keys published here, from 1.5 mm to 6 mm.

• Width across flats (s): 3 mm on the 3 mm hex key, against 2.5 mm on the 2.5 mm and 4 mm on the 4 mm.
• Width across corners (e): 3.31 to 3.39 mm on the 3 mm hex key, against 2.75 to 2.82 mm on the 2.5 mm and 4.43 to 4.53 mm on the 4 mm.
• Long arm length, standard (l1): 66 mm on the 3 mm hex key, against 58.5 mm on the 2.5 mm and 74 mm on the 4 mm.
• Long arm length, standard, limits (l1_lim): 62 to 66 mm on the 3 mm hex key, against 54.5 to 58.5 mm on the 2.5 mm and 70 to 74 mm on the 4 mm.
• Long arm length, long (l1_long): 93 mm on the 3 mm hex key, against 87.5 mm on the 2.5 mm and 104 mm on the 4 mm.
• Long arm length, long, limits (l1_long_lim): 89 to 93 mm on the 3 mm hex key, against 83.5 to 87.5 mm on the 2.5 mm and 100 to 104 mm on the 4 mm.
• Long arm length, extra-long (l1_xlong): 129 mm on the 3 mm hex key, against 114.5 mm on the 2.5 mm and 144 mm on the 4 mm.
• Long arm length, extra-long, limits (l1_xlong_lim): 125 to 129 mm on the 3 mm hex key, against 110.5 to 114.5 mm on the 2.5 mm and 140 to 144 mm on the 4 mm.

The 3 mm hex key in its other versions

• 3 mm-L Hex Key (Allen Key), Long Arm, ISO 2936, with the same values.
• 3 mm-XL Hex Key (Allen Key), Extra-long Arm, ISO 2936, with the same values.

Other sizes

• One size smaller: 2.5 mm Hex Key (Allen Key), ISO 2936, 2.5 mm across flats, arms 58.5 mm and 20.5 mm.
• One size larger: 4 mm Hex Key (Allen Key), ISO 2936, 4 mm across flats, arms 74 mm and 29 mm.

Documents

• CC-ISO2936-DS-3.pdf: 3 datasheet: values with levels, sources
• CC-ISO2936-SZ-3.pdf: 3 drawing: this size's values on the views
• parts.json: the part record of this size (the platform contract)

Sources

amesweb-iso2936, fasten-it-iso2936, iso2936-2014-sample. Full citations: the method page and this size's datasheet.

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