SERRATED SAFETY WASHERS ( RIB WASHERS )

Serrated Washers are Disc Springs with Trapezoidal Cross Section on both sides for gripping. lIS serrated safety washers are ready to fit washers to sustain preload and avoid loosening. As the bolt is tightened the serrations crunch into the mating faces and prevents the screw from loosening up due to vibration. Also, the disc shape holds the necessary tension. They are available in various sizes to fit bolts or screws. The diameters for Serrated Washers are matched to screw dimensions. The outer diameter of washer is matched to the head diameter of screw head. This allows using screw and bolt including recessed heads, except countersunk screw.

SERRATED SAFETY WASHERS

SERRATED SAFETY WASHERS

The advantages of Serrated Safety Washers are :
1. Used for high vibration resistance due to positive rib contact
2. Excellent pretensioning
3. Through proper radius selection, no splitting/cracking occurs during tightening
4. The concentric force of the washer eliminates the chances of bending the fastener
5. Extensive application and flexibility, minimizes stocks

IIS has ready stock of all the sizes of serrated safety washers, which can be supplied in variety of materials.


DIMENSIONS TABLE FOR SERRATED WASHER SERIES
Size (Nominal)
d1 H14
d2 H14
s
h max.
h min.
for bolts
(mm) (mm) (mm) (mm) (mm) (mm) metric
(mm)
imperial
(inch)
1.6 1.7 3.2 0.35 0.6 0.38 1.6  
2 2.2 4 0.35 0.6 0.39 2  
2.5 2.7 4.8 0.45 0.9 0.49 2.5  
3 3.2 5.5 0.45 0.9 0.51 3 1/8"
3.5 3.7 6 0.45 0.9 0.52 3.5  
4 4.3 7 0.5 1 0.59 4 5/32"
5 5.3 9 0.6 1.1 0.73 5 3/16"
6 6.4 10 0.7

1.2

0.82 6  
6.35 6.7 9.5 0.7 1.2 0.79   1/4"
7 7.4 12 0.7 1.3 0.89 7  
8 8.4 13 0.8 1.4 0.98 8 5/16"
10 10.5 16 1 1.6 1.21 10 3/8"
11.1 11.6 15.9 1 1.6 1.18   7/16"
12 13 18 1.1 1.7 1.31 12  
12.7 13.7 19 1.1 1.8 1.33   1/2"
14 15 22 1.2 2.0 1.52 14 9/16"
16 17 24 1.3 2.1 1.63 16 5/8"
18 19 27 1.5 2.3 1.85 18  
19 20 30 1.5 2.5 1.98   3/4"
20 21 30 1.5 2.5 1.94 20  
22 23 33 1.5 2.7 2.08 22 7/8"
24 25.6 36 1.8 2.9 2.32 24  
25.4 27 38 2 3.1 2.52   1"
27 28.6 39 2 3.1 2.52 27  
30 31.6 45 2 3.6 2.78 30 11/8"
36 38 54 2.5 4.2 3.38 36 13/8"

| Disc Springs | Disc Spring Materials | Disc Spring Application | Disc Spring Installation | Symbols & Units
Disc Springs Std Din | Disc Spring Tolerances | Ball Bearing Disc Springs | Slotted Ball Bearing Disc Springs | Disc Springs Washers | Belleville Washer
Wave Spring Washers | Serrated Safety Washers | Flapper Reed Valves | Stamping Sheet Metal | Curved Washers
Spiral Power Spring | Spiral Torsion Spring | Hot Coiled Springs | Coil Springs | Compression Springs | Torsion Springs|

Address : Plot No. A-26, Road No. 10, Wagle Industrial Estate, Thane - 400604, Maharashtra, INDIA
* Tel. : 2582 1941 / 2508 / 2581 3416 * Fax : 91-22-2582 4478
* Email : sales@internationalsprings.com