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TECHNICAL BULLETIN
EVERSEAL SEALING WASHERS
Type of Washer
Composite if metal/rubber heat bonded and formed into round convex washer.
Type of Material
1. Galvanized: Stainless; Aluminum
2. Rubber - Blended combination of EPDM
Recommended Usage
Primary use is to seal and prevent leakage on assembled fasteners. Also acts as a
cushionary, non-abrasive agent against assembled parts. May also be used to dampen
vibration to surrounding fixtures.
PERFORMANCE TESTS
| Physical Characteristics |
| Hardness |
70 ± 5 Durometer |
| Tensile |
1400 PSI |
| Minimum Recommended Temperature |
-200F |
| Maximum Recommended Temperature |
+2250F |
| Physical Tests |
OZONE ASTM 01149
100 PPM 1040F 20% Elongation |
500 hours at 7X Magnification
No visible signs of cracking |
WEATHEROMETER ASTM 0750
Atlas Weatherometer Model X1-A
with water spray Elongation |
500 hours at 7X Magnification
No visible signs of cracking |
MAXIMUM & MINIMUM SEATING
TORQUES
| Washer Size |
Material |
Minimum |
Maximum |
| 1/2" |
Galvanized |
20 Inch lbs. |
45 Inch lbs. |
| 1/2" |
Stainless |
20 Inch lbs. |
45 Inch lbs. |
| 1/2" |
Aluminum |
20 Inch lbs. |
40 Inch lbs. |
| 5/8" |
Galvanized |
25 Inch lbs. |
75 Inch lbs. |
| 5/8" |
Stainless |
25 Inch lbs. |
75 Inch lbs. |
| 5/8" |
Aluminum |
25 Inch lbs. |
60 Inch lbs. |
| 3/4" |
Galvanized |
30 Inch lbs. |
100 Inch lbs. |
| 3/4" |
Stainless |
30 Inch lbs. |
100 Inch lbs. |
| 3/4" |
Aluminum |
30 Inch lbs. |
75 Inch lbs. |
| 1-1/8" |
Galvanized |
35 Inch lbs. |
100 Inch lbs. |
| 1-1/8" |
Stainless |
35 Inch lbs. |
110 Inch lbs. |
| 1-1/8" |
Aluminum |
35 Inch lbs. |
100 Inch lbs. |
Test Results
Pull Over Tests
To determine the tension required to pull steel over fastener head.
Thickness
of Steel |
Hardness of
Steel Rockwell B |
Drilled
Hole Size |
Washer
Diameter |
Average Pull Over
in Lbs. |
| 20 gauge |
56 |
3/16" |
5/8 Galv. |
1408 |
| 22 gauge |
52 |
3/16" |
5/8 Galv. |
1211 |
| 24 gauge |
50 |
3/16" |
5/8 Galv. |
896 |
| 26 gauge |
49 |
1/8" |
5/8 Galv. |
612 |
The test results shown are believed to be reliable.
However, variances in testing and actual field
conditions may alter the results. There is no
expressed or implied warranty on the test Data.
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