DIN 970 Hexagon Nut with Metric and Inch Thread

DIN 970 is a German standard for manufacturing hexagon nuts fitted with metric or inch thread. It is used in the assembly of threaded connections of parts together with various types of bolts, screws and studs.

It is a hexagon-shaped product with an internal hole; such nuts are convenient for tightening with a wrench or a screwdriver. The closest equivalent is manufactured to ISO 4032. The thread pitch may be coarse or fine depending on the purpose of the product.

Materials and coatings

Universal hexagon nuts are made of carbon steel with property class 8 or 10 – this makes the fasteners resistant to mechanical loads. Steel nuts may be fitted with a zinc coating for more reliable corrosion resistance. For use in highly corrosive environments, nuts made of stainless steel grades A1-A5, as well as brass or other non-ferrous alloys, are used.

The fasteners have the following standard characteristics:

• The metric thread diameter in the hole ranges from M1 to M120 – the fasteners are manufactured in a wide size range.
• The height of the products according to the standard can range from 0.8 to 85 mm.
• The width across flats of the nut can be from 2.5 to 175 mm.

Application of the fasteners

Nuts of this type are widely used in machine-building industries: they are used for the needs of instrument making, machine tool building, automotive manufacturing, and more. They are used to secure various parts of assemblies and units and are designed for significant mechanical loads.

FLOK supplies DIN 970 nuts in a wide size range.

d m DIN/ISO s DIN/ISO
M1	0.8	2.5
M1.2	1	3
M1.4	1.2	3
M1.6	1.3	3.2
M2	1.6	4
M2.5	2	5
M3	2.4	5.5
M3.5	2.8	6
M4	3.2	7
M5	4/4.7	8
M6	5/5.2	10
M7	5.5	11
M8	6.5/6.8	13
M10	8/8.4	17/16
M12	10/10.8	19/18
M14	11/12.8	22/21
M16	13/14.8	24
M18	15/15.8	27
M20	16/18	30
M22	18/19.4	32/34
M24	19/21.5	36
M27	22/23.8	41
M30	24/25.6	46
M33	26/28.7	50
M36	29/31	55
M39	31/33.4	60
M42	34	65
M45	36	70
M48	38	75
M50	38	75
M52	42	80
M56	45	85
M60	48	90
M64	51	95
M68	54	100
M72	58	105
M76	61	110
M80	64	115
M85	68	120
M90	72	130
M100	80	145
M110	88	155
M120	95	175

Designations:

d - nominal thread diameter

m - nut height

s - width across flats