DIN 439 Hexagon Nut, Low

DIN 439 low hexagon nuts are fasteners with a reduced profile height compared to standard nuts. Dimensions and tolerances comply with the standard’s requirements, ensuring geometric accuracy and joint reliability. Used in machine building, construction, and the manufacture of instruments and machine tools.

Key features of DIN 439 nuts

• Shape: standard hexagon, which makes it easy to grip with a tool. The low height is useful in confined spaces or when minimizing protruding parts of a structure is required.
• Material: stainless steels grade A2 and A4, brass, zinc-plated carbon steel. Material choice depends on operating conditions: corrosion resistance, mechanical strength, or decorative properties.
• Thread parameters: metric thread (M6, M8, M10, etc.) or imperial. Thread diameter and pitch are selected based on the project’s technical requirements.
• Chamfers: many models feature chamfers on the face edges — this eases installation and reduces the risk of thread damage during tightening.
• Standards compliance: dimensions and tolerances comply with DIN, GOST, and ISO tables, ensuring compatibility with most fastener types.

Advantages of DIN 439 nuts

• Compactness: low profile suits tight spaces.
• Durability: manufacturing precision and material quality ensure reliability and service life.
• Material variety: available in stainless steel, brass, and zinc-plated steel for different operating conditions.
• Versatility: compatible with most standard bolts and screws used in industry and construction.

Applications

DIN 439 low-profile nuts are used in the following areas:

• Machine and automotive manufacturing;
• Furniture and equipment manufacturing;
• Construction and repair work;
• Installation of electrical devices and instruments.

DIN 439 equivalents

If replacement is needed, equivalents under the international standard ISO 4035 and the Russian standard GOST 5916 can be considered. Before selecting alternative products, it is important to verify that all parameters match.

DIN 439 nuts are suitable for projects requiring a combination of reliability, precision, and compactness.

Dimension table for DIN 439 low hexagon nuts

d	m DIN/ISO	s DIN/ISO
M2	1.2	4
M2.5	1.6	5
M3	1.8	5.5
M3.5	2	6
M4	2.2	7
M5	2.7	8
M6	3.2	10
M8	5/4	13
M10	6/5	17/16
M12	7/6	19/18
M14	8/7	22/21
M16	8	24
M18	9	27
M20	9/10	30
M22	10/11	32/34
M24	10/12	36
M26	12/13	41
M27	12/13.5	41
M28*	12/14	41
M30	12/15	46
M32*	14/16	50
M33	14/16.5	50
M35*	14/17.5	55
M36	14/18	55
M38*	16/19	60
M39	16/19.5	60
M40*	16/20	60
M42	16/21	65
M45	18/22.5	70
M48	18/24	75
M50*	20/25	75
M52	20/26	80

• It is not recommended to use the nut dimensions.

Designations:

d - nominal thread diameter

m - nut height

s - width across flats

Dimensions of DIN 439 low hexagon nuts with fine thread, in mm

d	m min.	s
M8×0.75	3.7	13
M8×1	3.7	13
M10×1	4.7	17
M10×1.25	4.7	17
M12×1	5.7	19
M12×1.25	5.7	19
M12×1.5	5.7	19
M14×1.5	6.42	22
M16×1	7.42	24
M16×1.5	7.42	24
M18×1.5	8.42	27
M20×1.5	9.1	30
M20×2	9.1	30
M22×1.5	9.9	34
M22×2	9.9	34
M24×1.5	10.9	36
M24×2	10.9	36
M27×1.5	12.4	41
M27×2	12.4	41
M30×1.5	13.9	46
M30×2	13.9	46
M33×1.5	15.4	49
M33×2	15.4	49