ISO 4161 Hex Flange Nuts

ISO 4161 hexagon flange nuts (style 2) with metric coarse threads, featuring an integrated flange that provides a larger bearing surface. These nuts combine the enhanced strength of style 2 height with the load-distributing benefits of a flange, making them suitable for high-strength applications requiring improved bearing performance.

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Product introduction

Common Specifications

Materials	Carbon steel
Class	5, 6, 8, 10
Range	M3 – M20
Thread	Coarse , Fine, Extra Fine, Special-Fine
Surface	Plain, zinc plated, hot-dip galvanized, GEOMET, ZINC-NICKLE, DACROMATE etc.

Key Features

Style 2 high profile for enhanced strength
Integrated flange for improved load distribution
Larger bearing surface reduces pressure on materials
Conforms to ISO 4161 international standard
Metric coarse thread series

Application industry

Heavy machinery manufacturing
Automotive powertrain assemblies
Structural steel connections
Industrial fastening systems

data table

Size	M5	M6	M8	M10	M12	M14	M16	M20
Coase	0.8	1	1.25	1.5	1.75	2	2	2.5
Fine	0.5	0.75	1	1.25	1.5	1.5	1.5	2
Extra Fine			0.75	1	1.25	1	1	1.5
s Min (mm)	7.78	9.78	12.73	14.73	17.73	20.67	23.67	29.16
s Max (mm)	8.00	10.00	13.00	15.00	18.00	21.00	24.00	30.00
e Min (mm)	8.79	11.05	14.38	16.64	20.03	23.36	26.75	32.95
m Min (mm)	4.70	5.70	7.64	9.64	11.57	13.30	15.30	18.70
m Max (mm)	5.00	6.00	8.00	10.00	12.00	14.00	16.00	20.00
dc Max (mm)	11.80	14.20	17.90	21.80	26.00	29.90	34.50	42.80

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