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Home / Products / Other Fastneners / Assemblies / ASME/ANSI B18.13.1M:2011 Metric Pan Head Slotted Spring Washer Assembly

ASME/ANSI B18.13.1M:2011 Metric Pan Head Slotted Spring Washer Assembly

ASME/ANSI B18.13.1M:2011 Metric Pan Head Slotted Spring Washer Assembly features a metric slotted pan head tapping screw with a spring washer in SEMS form, making it suitable for light assemblies requiring tapping engagement, elastic anti-loosening support, and pre-assembled part management.

The spring washer provides elastic compensation after tightening to help resist light vibration loosening; the slotted pan head supports common tooling and the tapping thread enables direct installation. This structure supports efficient assembly while balancing joint stability, load distribution, and convenient maintenance, making it practical for standardized purchasing and volume production.

This product can be used in electrical equipment, control boxes, light metal parts, repair replacement, and export projects. Spring washer size, screw length, and surface finish can be selected to meet requirements for corrosion protection, wear resistance, assembly efficiency, and long-term reliability.

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PREV：DIN 6901:1990 Washer Assembly Assembly NEXT：DIN EN ISO 10510 (S1):2011 Hex Head Tapping Screw and Flat Washer Assembly

Dimensions unit: inch 

Thread size d

ST2.9

ST3.5

ST4.2

ST4.8

ST5.5

ST6.3

ST8

ST9.5

P

Pitch

1.1

1.3

1.4

1.6

1.8

1.8

2.1

2.1

d1

Max.

2.57

3.08

3.66

4.11

4.78

5.52

7.06

8.59

Min.

2.44

2.95

3.5

3.96

4.6

5.31

6.86

8.38

h

Min.

0.79

0.86

0.79

1.42

1.42

1.57

1.98

2.39

dc

Max.

5.1

6.43

7.82

8.43

9.09

11.82

13.61

15.95

Min.

4.83

6.09

7.47

8.07

8.71

11.41

13.21

15.54

dk

Max.

5.6

7

8

9.5

11

12

16

20

Min.

5.3

6.6

7.6

9.1

10.6

11.6

15.6

19.5

k

Max.

1.8

2.1

2.4

3

3.2

3.6

4.8

6

Min.

1.6

1.9

2.2

2.7

2.9

3.3

4.5

5.7

n

Min.

0.86

1.06

1.26

1.26

1.66

1.66

2.06

2.56

Max.

1

1.2

1.51

1.51

1.91

1.91

2.31

2.81

t

Min.

0.7

0.8

1

1.2

1.3

1.4

1.9

2.4

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Hangzhou Better Fastener
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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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NEWS

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