DIN 1479 Steel Hexagon Coupling Nut (Connector)

DIN 1479 is a standard for manufacturing coupling nuts: elongated hexagon nuts with additional side holes. The purpose of the fastener is to connect threaded studs with right-hand and left-hand threads. Hexagon coupling nuts allow quick extension of a threaded connection’s length, which is convenient when assembling structures.

The edges feature notches for easier installation. This type of fastener is used in mechanical engineering, shipbuilding, and other industrial sectors.

Specifications

Hexagon coupling nuts are made of steel with an electroplated zinc coating. The zinc plating protects the fastener from corrosion. The nuts can also be made of A2 stainless steel — an acid-resistant alloy that is not subject to corrosion, which broadens the range of applications. These materials give the fastener a long service life and resistance to moisture exposure.

Product specifications:

• Hole thread diameter: from M6 to M30.
• Hole thread pitch: from 1 to 3.5 mm.
• Threaded portion length of the elongated nut: from 22 to 36 mm.
• Width across flats: from 10 to 46 mm.

A similar product is manufactured to the DIN 6334 standard, with possible minor deviations in dimensions.

Applications

The fastener is used in mechanical engineering, shipbuilding, and the manufacture of machine tools and equipment. It is used to connect studs of matching diameter, extending the length of a threaded connection. High-strength materials are used in manufacturing, which ensures a long service life for the fastener.

Dimensions of DIN 1479 coupling nut, in mm:

d1	d2	l	m	s	e
M6		30	22.5	10	11.05
M8		35	25	13	14.37
M10		45	33	17	18.90
M12		55	40	19	21.10
M14
M16		75	55	24	26.75
M20	21	95	24	30	33.53
M22
M24	26	115	29	36	39.98
M30	32	125	36	46	51.28

DIN 1479 coupling nut dimensions

d₁	d₂	d₄	l	m	n	s	N
M6	-	4	30	22.5	-	10	5.7
M8	-	4	35	25	-	13	10
M10	-	4	45	33	-	17	16
M12	-	4	55	40	-	19	24
M16	-	4	75	55	-	24	44
M20	21	4	95	-	24	30	69
M24	26	4	115	-	29	36	100
M30	32	4	125	-	36	46	158
M36	38	4	145	-	45	55	230

Designations:

d₁ - nominal internal thread diameter, mm

d₂ - internal diameter of the nut without thread, mm

d₄ - diameter of side holes in the nut, mm

l - height of the coupling nut, mm

m - distance from the nut end face to the edge of the hole, mm

n - length of the threaded portion, mm

s - nut width across flats, mm

N - permissible load, kN