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Serrated Safety Washers: Light and Medium Duty

Screw Size 1.60mm - 30.00mm

Based on the disc spring concept, this range of safety washers has the unique feature of radial serrations on both the concave and convex surfaces. When final flattening of the safety washer occurs with tightening of the screw, these serrations bite into the mating faces, thus preventing loosening of the screw due to vibration etc. In addition, the disc spring profile will assist in retaining the required screw tension.

Compared with a conventional disc spring, or Belleville spring washer, the safety washer offers a reduced outside diameter. This corresponds to most screw head sizes, and is particularly compatible with the hexagonal socket type screw.

Note: 'Lo' is maximum dimension in delivered condition.

Material: Carbon Spring Steel. Surface Treatment: black
Other materials and surface treatments available on request.

PDF version 44Kb

"S" Type — Light Duty
Code
No.
Screw
Size
mm
Outer
Dia.
(De)
mm
Inner
Dia.
(Di)
mm
Thick.
(t)
mm
Total
Ht.
(Lo)
mm
Wt.
per
1000
Kg
Screw
Size
inch
S3217035 1.60 3.20 1.70 0.35 0.60 0.016  
S422035 2.00 4.00 2.20 0.35 0.60 0.017  
S4827045 2.50 4.80 2.70 0.45 0.90 0.040  
S5532045 3.00 5.50 3.20 0.45 0.90 0.044 18
S637045 3.50 6.00 3.70 0.45 0.90 0.049  
S74305 4.00 7.00 4.30 0.50 1.00 0.077 532
S95306 5.00 9.00 5.30 0.60 1.10 0.167 316
S106407 6.00 10.00 6.40 0.70 1.20 0.206  
S956707 6.35 9.50 6.70 0.70 1.20 0.168 ¼
S127407 7.00 12.00 7.40 0.70 1.30 0.312  
S138408 8.00 13.00 8.40 0.80 1.40 0.402 516
S161051 10.00 16.00 10.50 1.00 1.60 0.773 38
S1591161 11.10 15.90 11.60 1.00 1.60 0.660 716
S181311 12.00 18.00 13.00 1.10 1.70 0.970  
S1913711 12.70 19.00 13.70 1.10 1.80 1.082 ½
S221512 14.00 22.00 15.00 1.20 2.00 1.805  
S241713 16.00 24.00 17.00 1.30 2.10 2.115 58
S271915 18.00 27.00 19.00 1.50 2.30 2.945  
S302015 19.00 30.00 20.00 1.50 2.40 4.080 ¾
S302115 20.00 30.00 21.00 1.50 2.40 3.710  
S332315 22.00 33.00 23.00 1.50 2.50 4.548 78
S3625618 24.00 36.00 25.60 1.80 2.70 6.260  
S38272 25.40 38.00 27.00 2.00 2.80 7.220 1
S392862 27.00 39.00 28.60 2.00 2.90 6.880  
S453162 30.00 45.00 31.60 2.00 3.20 11.320 118
S543825 36.00 54.00 38.00 2.50 4.00 21.900  
"VS" Type — Medium Duty
Code
No.
Screw
Size
mm
Outer
Dia.
(De)
mm
Inner
Dia.
(Di)
mm
Thick.
(t)
mm
Total
Ht.
(Lo)
mm
Wt.
per
1000
Kg
Screw
Size
inch
VS9531 5.00 9.00 5.30 1.00 1.30 0.29 316
VS10641 6.00 10.00 6.40 1.00 1.40 0.31  
VS138412 8.00 13.00 8.40 1.20 1.70 0.59 516
VS1610515 10.00 16.00 10.50 1.50 2.00 1.12 38
VS181315 12.00 18.00 13.00 1.50 2.10 1.12  
VS221515 14.00 22.00 15.00 1.50 2.20 1.90  
VS24172 16.00 24.00 17.00 2.00 2.60 2.70 58
VS27192 18.00 27.00 19.00 2.00 2.70 3.53  
VS30212 20.00 30.00 21.00 2.00 2.80 4.35  
VS33232 22.00 33.00 23.00 2.00 2.90 5.84 78
VS3625625 24.00 36.00 25.60 2.50 3.30 8.00  
VS3928625 27.00 39.00 28.60 2.50 3.40 7.66  
VS4531625 30.00 45.00 31.60 2.50 3.60 13.70 118

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Valley Spring Co Ltd
Pottery Lane East
Chesterfield, Derbyshire
United Kingdom S41 9BH

Valley Spring Company: Chesterfield Derbyshire

Tel: +44 (0)1246 451981
Fax: +44 (0)1246 454327
info@valleyspring.com


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