2.5 mm-L Hex Key (Allen Key), Long Arm, ISO 2936

The 2.5 mm-L hex key (ISO 2936, long arm) has a long arm of 87.5 mm and a short arm of 20.5 mm, 2.5 mm across flats. Here as simplified STEP files.

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

• Also searched as: 2.5 mm-L hex key
• Model id: iso2936-s2-5-l
• Standard: ISO 2936:2014 · size 2.5 mm

Files

Part key	Simplified
iso2936-s2-5-l	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
s	Width across flats	2.46	2.5	2.5	2.48	midpoint of min–max	L2
e	Width across corners	2.75		2.82	2.785	midpoint of min–max	L2
l1	Long arm length, standard		58.5		58.5	nominal	L2
l1_lim	Long arm length, standard, limits	54.5		58.5	56.5	midpoint of min–max	L2
l1_long	Long arm length, long		87.5		87.5	nominal	L2
l1_long_lim	Long arm length, long, limits	83.5		87.5	85.5	midpoint of min–max	L2
l1_xlong	Long arm length, extra-long		114.5		114.5	nominal	L2
l1_xlong_lim	Long arm length, extra-long, limits	110.5		114.5	112.5	midpoint of min–max	L2
l2	Short arm length		20.5		20.5	nominal	L2
l2_lim	Short arm length, limits	18.5		20.5	19.5	midpoint of min–max	L2

Drawing

As a PDF: CC-ISO2936-SZ-2.5.pdf.

The 2.5 mm-L hex key beside the 2 mm-L and the 3 mm-L

The 2.5 mm-L is number 3, counting from the smallest, of the 7 ISO 2936 hex keys published here, from 1.5 mm-L to 6 mm-L.

• Width across flats (s): 2.5 mm on the 2.5 mm-L hex key, against 2 mm on the 2 mm-L and 3 mm on the 3 mm-L.
• Width across corners (e): 2.75 to 2.82 mm on the 2.5 mm-L hex key, against 2.18 to 2.25 mm on the 2 mm-L and 3.31 to 3.39 mm on the 3 mm-L.
• Long arm length, standard (l1): 58.5 mm on the 2.5 mm-L hex key, against 52 mm on the 2 mm-L and 66 mm on the 3 mm-L.
• Long arm length, standard, limits (l1_lim): 54.5 to 58.5 mm on the 2.5 mm-L hex key, against 50 to 52 mm on the 2 mm-L and 62 to 66 mm on the 3 mm-L.
• Long arm length, long (l1_long): 87.5 mm on the 2.5 mm-L hex key, against 77 mm on the 2 mm-L and 93 mm on the 3 mm-L.
• Long arm length, long, limits (l1_long_lim): 83.5 to 87.5 mm on the 2.5 mm-L hex key, against 75 to 77 mm on the 2 mm-L and 89 to 93 mm on the 3 mm-L.
• Long arm length, extra-long (l1_xlong): 114.5 mm on the 2.5 mm-L hex key, against 102 mm on the 2 mm-L and 129 mm on the 3 mm-L.
• Long arm length, extra-long, limits (l1_xlong_lim): 110.5 to 114.5 mm on the 2.5 mm-L hex key, against 100 to 102 mm on the 2 mm-L and 125 to 129 mm on the 3 mm-L.

The 2.5 mm-L hex key in its other versions

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

Other sizes

• One size smaller: 2 mm-L Hex Key (Allen Key), Long Arm, ISO 2936, 2 mm across flats, arms 77 mm and 18 mm.
• One size larger: 3 mm-L Hex Key (Allen Key), Long Arm, ISO 2936, 3 mm across flats, arms 93 mm and 23 mm.

Documents

• CC-ISO2936-DS-2.5.pdf: 2.5 datasheet: values with levels, sources
• CC-ISO2936-SZ-2.5.pdf: 2.5 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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