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DIN EN ISO 10510 (S1):2011 Hex Head Tapping Screw and Flat Washer Assembly

DIN EN ISO 10510 (S1):2011 Hex Head Tapping Screw and Flat Washer Assembly is characterized by a hex head tapping screw assembled with a flat washer under the ISO system and is intended for assemblies needing socket installation, tapping engagement, and a larger bearing surface.

The flat washer reduces indentation on sheet metal, the hex head supports fast torque application, and the tapping thread creates fastening engagement in pilot holes. In assembly, the design helps reduce supporting operations, improve positioning consistency, and maintain good interchangeability in repeated production or field service.

Typical applications include metal cladding, equipment brackets, vehicle accessories, HVAC equipment, and engineering installation. The product can be configured with washer diameter, screw size, plating, and corrosion-resistant material to suit indoor, outdoor, light-load, vibration-exposed, or export supply conditions.

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Dimensions unit: inch 

Thread size

ST2.2

ST2.9

ST3.5

ST4.2

ST4.8

ST5.5

ST6.3

ST8

ST9.5

P

Pitch

0.8

1.1

1.3

1.4

1.6

1.8

1.8

2.1

2.1

k

Max.

1.6

2.3

2.6

3

3.8

4.1

4.7

6

7.5

Min.

1.3

2

2.3

2.6

3.3

3.6

4.1

5.2

6.5

s

Max.

3.2

5

5.5

7

8

8

10

13

16

Min.

3.02

4.82

5.32

6.78

7.78

7.78

9.78

12.73

15.73

e

Min.

3.38

5.4

5.96

7.59

8.71

8.71

10.95

14.26

17.62

h

Standard type

Nominal

1

1

1

1

1

1.6

1.6

1.6

2

Enlarged size

Nominal

1

1

1

1

1.6

1.6

1.6

2

2.5

dc

Standard type

Max.

5

7

8

9

10

12

14

16

20

Enlarged size

Max.

7

9

11

12

15

15

18

24

30

a

Max.

0.8

1.1

1.3

1.4

1.6

1.8

1.8

2.1

2.1

①, The mechanical properties of screws as components of combined self-tapping screws must comply with the requirements of ISO 2702. After assembly and heat treatment, the gasket must have a hardness of 90HV to 320HV.

Vickers hardness testing must be performed according to ISO 6507-1.

Test load: HV 10, nominal thickness h~1,2 mm

Test load: HV 30, nominal thickness h > 1,2 mm

Appropriate precautions must be taken before assembly

②, the name and code of the screw

ISO 1479, Hexagonal self-tapping screws, S1

③, Name and code of gasket:

ISO 10669, Flat washers - for combination self-tapping screws, standard N, extra L 

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Better Fastener is a professional fastener enterprise specializing in the manufacturing of steel washers, stainless steel washers, spring washers and sealingwashers. Founded in 2001 as a washer factory, the company expanded into a comprehensive enterprise integrating washers, nuts, bolts, spring nuts and other fastener products in 2010.

The company positions itself as a provider of comprehensive one-stop services for customers, relying on technological R&D, industrial investment and trade distribution.

With an experienced professional team and a sound sales network, Better Fastener has achieved excellent sales performance in both domestic and foreign markets,and has grown into one of the competitive manufacturers and suppliers in China's industrial fastener industry.

Better Fastener is committed to becoming a trusted fastener supplier for customers with reliable product quality, reasonable prices and on-time delivery

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  • What is a Washers?

    Simply put, a washer is a thin, disc-shaped ring with a central hole, typically made of metal (such as carbon steel, stainless steel, or copper) or non-metallic materials (such as rubber, plastic, or asbestos). It is placed between the head of a bolt/nut and the surface of the workpiece, or at the junction between the ...

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