Shuangyuan Disc Springs CO.,LTD

Serrated Safety Washers (anti-vibration)

serrated safety washers


Serrated safe spring washers are also named as lock washers that solve
serrated safety washers
the safety problem of bolt connections. Their exclusive performance is provided by their serrated surfaces. S series and VS series offer the best safety thanks to their less shaking. The smoothly chamfered serrated surface is evenly pressed on the interface of bolt connection and safely presses the connecting parts to prevent their relaxation. The deformation amount (H-S) of disc springs maintains certain pressure on nuts. The inside frication of serrated surface offers extra protection against relaxation. S series are standard load, VS series are medium load. They can be made of spring steel and subject to quenching, surface blackening, and can also be made of stainless steel, phosphor bronze, and other surface treatments include galvanization or Cd plating.

Toothed check washer includes S series and VS series, which can be used to prevent against the looseness of bolts incurred due to vibration by increasing the frictional resistance after the connection of washer and bolt.


一、Standard load specifications
Item no. sizes D/mm d/mm t/mm H0Max/mm Q/kg/1000pec
SY9101 M1.6 1.7 3.2 0.35 0.6 0.013
SY9102 M2 2.2 4 0.35 0.6 0.021
SY9103 M2.5 2.7 4.8 0.45 0.9 0.039
SY9104 M3 3.2 5.5 0.45 0.9 0.049
SY9105 M3.5 3.7 6 0.45 0.9 0.055
SY9106 M4 4.3 7 0.5 1 0.085
SY9107 M5 5.3 9 0.6 1.1 0.167
SY9108 M6 6.4 10 0.7 1.2 0.2
SY9109 M6.35 6.7 9.5 0.7 1.2 0.15
SY9110 M7 7.4 12 0.7 1.3 0.355
SY9111 M8 8.4 13 0.8 1.4 0.392
SY9112 M10 10.5 16 1 1.6 0.75
SY9113 M11.1 11.6 15.9 1 1.6 0.595
SY9114 M12 13 18 1.1 1.7 0.879
SY9115 M12.7 13.7 19 1.1 1.8 0.976
SY9116 M14 15 22 1.2 2 1.641
SY9117 M16 17 24 1.3 2.1 1.984
SY9118 M18 19 27 1.5 2.3 2.97
SY9119 M19 20 30 1.5 2.5 4.1
SY9120 M20 21 30 1.5 2.5 3.742
SY9121 M22 23 33 1.5 2.7 4.507
SY9122 M24 25.6 36 1.8 2.9 5.91
SY9123 M25.4 27 38 2 3.1 7.449
SY9124 M27 28.6 39 2 3.1 7.369
SY9125 M30 31.6 45 2 3.6 10.78
SY9126 M36 38 54 2.5 4.2 21.28

二、Medium load specification
Item no. sizes D/mm d/mm t/mm H0Max/mm Q/kg/1000pec
SY9201 5 5.3 9 1 1.3 0.273
SY9202 6 6.4 10 1 1.4 0.3
SY9203 8 8.4 13 1.2 1.7 0.615
SY9204 10 10.5 16 1.5 2 1.167
SY9205 12 13 18 1.5 2.1 1.223
SY9206 14 15 22 1.5 2.2 2.089
SY9207 16 17 24 2 2.6 3.142
SY9208 18 19 27 2 2.7 4.041
SY9209 20 21 30 2 2.8 5.066
SY9210 22 23 33 2 3 6.117
SY9211 24 25.6 36 2.5 3.4 8.865
SY9212 27 28.6 39 2.5 3.5 9.731
SY9213 30 31.6 45 2.5 3.8 14.38