Disc Springs and Belleville Washers

Product Order Line:
01527 521000

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Light Duty

Serrated Safety Washers (PDF - 44Kb).

Serrated Safety Washers

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.

"S" Type

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  

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