DIN 937 Low Crown Nut

DIN 937 is a hexagon crown nut with reduced height of the threaded part. This shape allows it to be used for connecting parts in limited space, where it is not possible to use standard-height fasteners.

The crown element provides locking with a cotter pin to protect the connection from self-loosening. The product is designed for frequent tightening and loosening, during which the thread experiences heavy loads. Using this type of fastener increases the reliability and durability of the connection.

Manufacturing features

A nut to DIN 937 can be made from various materials. The most common option is carbon steel with property class 14H, 17H, 22H. If the fastener is intended for use in highly corrosive conditions, it is supplied with a zinc coating. Zinc plating provides corrosion resistance and extends the service life of the product. Nuts can also be made of brass and other non-ferrous alloys; stainless steel grades A2 and A4 may also be used for their manufacture – these alloys are not affected by corrosion.

Crown nuts have the following standard characteristics:

• The thread diameter can range from M6 to M30.
• The maximum height of the product, including the crown, can range from 5 to 24 mm.
• The width across flats of the product can range from 10 to 46 mm.
• Cotter pins sized from 1.6×14 to 6.3×50 can be used to secure the nut.

The closest equivalents of the fastener are manufactured in accordance with GOST 5932, 5919, ISO 7038. They may have some discrepancies in dimensions – consult our specialists when selecting a product.

Applications

Low crown nuts are used to create compact threaded connections resistant to loosening. They can be used in various fields of mechanical engineering, including machine tool building, instrument making, and others. The strength of the fastener and its corrosion resistance guarantee long-term use.

DIN 937 crown nuts are supplied by FLOK.

Dimensions of DIN 937 low crown nuts, mm:

d	de min.	n min.	m min	s
M6	-	2	5.7	10
M8	-	2.5	7.64	13
M10	-	2.8	8.64	17
M12	17	3.5	8.64	19
M14	19	3.5	10.57	22
M16	22	4.5	11.57	24
M18	25	4.5	12.3	27
M20	28	4.5	12.3	30
M24	34	5.5	14.3	36
M27	38	5.5	16.3	41
M30	42	7	17.3	46

d	de	m	n	s	w	sp
M6	-	6	2	10	3.5	1.6×14
M8	-	8	2.5	13	4.5	2×16
M10	-	9	2.8	17	5	2.5×20
M12	17	10	3.5	19	6	3.2×22
M14	19	11	3.5	22	7	3.2×25
M16	22	12	4.5	24	7	4×28
M18	25	13	4.5	27	8	4×32
M20	28	13	4.5	30	8	4×36
M22	30	15	5.5	32	9	5×36
M24	34	15	5.5	36	9	5×40
M27	38	17	5.5	41	11	5×45
M30	42	18	7	46	11	6.3×50
M33	46	20	7	50	13	6.3×56
M36	50	20	7	55	13	6.3×63
M39	55	22	7	60	13	6.3×71
M42	58	23	9	65	14	8×71
M48	65	25	9	75	16	8×80
M52	70	27	9	80	18	8×90