Contact Washers NFE 25-511

Contact Washers are conical shaped lock washers formed with a ribbed top surface.

The conical shape exerts locking force 360° around the underside of the screw head or nut. The ribbed top surface further enhances the locking force and resists the torqued fastener connection potential for loosening under pressure and vibration.

With a strict quality system, IIS products are put through rigorous in-house testing before being despatched to WASCA, so your mind is at ease every time you receive an IIS product. We can also supply full certifications for all products upon request.

Bolt Size

M100, M20, M7, M42, M36 – 13/8, M3, M76, M120, M27, M29, M56, M4 – 5/32, M8 – 5/16, M95, M2.5, M39, M30 – 11/8, M4, M72, M12, M115, M16, M52, M3 – 1/8″, M13, M90, M18, M2, M36, M27 – 1″, M3.5, M68, M11 – 7/16, M110, M24, M14, M48, M1.6, M33 – 11/4, M6, M85, M16 – 5/8, M130, M33, M64, M10, M105, M22 – 7/8, M8, M45, M5 – 3/16, M5, M80, M14 – 9/16, M125, M30, M22, M60, M10 – 3/8, 1/2, 1″, 1/4, 3/8, 3/4, 3/16, 3/5, 5/8, 5/16, 7/16, 9/16

Di

1.7, 10.2, 10.31, 10.5, 10.50, 101.0, 102, 106.0, 11.2, 11.6, 111.0, 112, 12.2, 12.3, 12.4, 12.83, 121.0, 126.0, 127, 13.0, 13.46, 13.7, 131.0, 14.2, 14.20, 14.3, 14.4, 141.0, 15.0, 15.00, 151.0, 16.00, 16.06, 16.3, 16.4, 16.66, 161.0, 17.0, 17.3, 171.0, 18.3, 181.0, 19.0, 19.00, 19.18, 191.0, 2.2, 2.20, 2.7, 2.70, 20.0, 20.4, 20.5, 202.0, 21.0, 21.00, 212.0, 22.4, 23.0, 23.00, 232.0, 242.0, 25.00, 25.4, 25.5, 25.6, 27.0, 28.00, 28.5, 28.6, 3.2, 3.20, 3.7, 3.70, 30.5, 31, 31.00, 31.6, 34.6, 35.5, 36, 38.0, 4.1, 4.2, 4.3, 4.83, 40.5, 41, 45.5, 46, 5.1, 5.2, 5.3, 50.5, 51, 55.5, 57, 6.1, 6.2, 6.4, 6.40, 6.48, 6.7, 6.73, 60.5, 61, 64, 65.5, 7.2, 7.4, 7.40, 70.5, 71, 72, 75.5, 8.05, 8.2, 8.4, 8.40, 8.43, 8.6, 81, 82, 85.5, 9.2, 9.65, 90.5, 92, 95.5, 10.30, 10.40, 7.10, 10.70, 103.40, 108.50, 113.30, 118.40, 11.40, 123.40, 128.50, 13.00, 13.50, 133.30, 15.20, 17.00, 19.50, 19.60, 20.00, 20.10, 21.30, 21.40, 25.40, 23.40, 25.30, 27.90, 28.40, 28.50, 3.40, 3.90, 31.40, 31.50, 34.30, 34.40, 37.30, 37.40, 4.30, 63.00, 4.40, 40.40, 43.20, 46.20, 49.50, 49.60, 5.30, 5.40, 53.60, 59.10, 59.20, 6.50, 6.60, 63.10, 67.10, 7.20, 71.10, 75.10, 75.20, 79.00, 79.10, 8.60, 8.70, 83.10, 88.10, 92.50, 97.30, 3.30, 3.80

De

3.2, 4.0, 4.8, 5.00, 5.5, 6.00, 6.0, 6, 7.00, 7.0, 7.10, 7.40, 7.60, 8.00, 8, 8.90, 9.00, 9.0, 9.50, 9.5, 9.8, 10.0, 10, 10.80, 10.90, 11.00, 11.40, 11.50, 12, 12.0, 12.5, 12.70, 12.8, 13.0, 13.50, 14.00, 14, 14, 15, 15.24, 15.8, 15.80, 15.9, 16.0, 16, 16.50, 16.60, 17.00, 17.78, 18, 18.00, 18.0, 18.50, 18.8, 19.0, 19.10, 19.50, 19.60, 20, 21.00, 21.10, 21.8, 22.0, 22, 22.5, 23, 23.00, 23.10, 23.7, 24.0, 24.13, 25, 25.40, 25.7, 27, 27.0, 27.7, 28.00, 28, 29.00, 29.00, 29.7, 29.72, 30, 30.0, 30.70, 31.5, 31.7, 31.80, 32, 33.0, 34, 34.50, 34.6, 35.00, 35.5, 35.80, 36.0, 36.6, 38.0, 38.10, 39.00, 39.0, 39.10, 39.6, 39.99, 40, 41.6, 41.90, 42.00, 45.00, 45.0, 45, 46.5, 47.00, 48.50, 49.00, 50.0, 50, 51.5, 54.0, 54.5, 55.00, 55.10, 56, 56.00, 58.40, 58.50, 60, 60.00, 61.5, 63, 63.00, 67.5, 70.00, 70, 70.10, 71, 71.5, 74.5, 74.90, 75.00, 76, 79.5, 80, 80.00, 84.5, 85.00, 85.10, 89.5, 89.90, 90, 90.00, 94.5, 95.00, 99.0, 100, 100.00, 105.00, 109.0, 110.00, 112, 114.0, 115.00, 119.0, 120.00, 124.0, 125, 129.0, 130.00, 135.00, 139.0, 140, 145.00, 149.0, 150.00, 150, 155.00, 159.0, 160, 165.00, 169.0, 170.00, 173.00, 178.00, 179.0, 180, 189.0, 198.0, 200, 213.0, 223.0, 225, 228.0, 238.0, 248.0, 250, 258.0, 268.0, 278.0, 288.0, 298.0, 308.0, 318.0, 338.0, 358.0

Thickness

0.2, 0.20, 0.25, 0.3, 0.30, 0.35, 0.36, 0.4, 0.40, 0.45, 0.5, 0.50, 0.55, 0.56, 0.6, 0.60, 0.7, 0.70, 0.8, 0.80, 0.9, 0.90, 1.0, 1.00, 1.1, 1.10, 1.2, 1.20, 1.25, 1.3, 1.4, 1.5, 1.50, 1.6, 1.60, 1.75, 1.8, 10.00, 11.10, 11.25, 11.35, 11.40, 12.00, 12.10, 12.90, 13.00, 13.10, 13.20, 14.00, 14.70, 16.00, 2.0, 2.2, 2.25, 2.4, 2.5, 2.7, 2.70, 2.75, 2.8, 22.2, 3.0, 3.2, 3.50, 3.75, 3.80, 4.00, 4.50, 4.70, 4.75, 4.80, 5.00, 5.50, 5.60, 5.65, 5.80, 6.00, 6.50, 6.55, 7.40, 7.50, 7.60, 8.00, 9.20, 9.30, 9.45, 9.50, 1.80, 2.00, 2.20, 2.50, 3.00, 3.20, 9.00, 4.60, 6.80, 7.00, 9.40, 4.30, 6.60, 3.30

Height Max

1.4, 1.8, 2.1, 2.3, 2.7, 3.1, 3.7, 4.1, 4.3

# of Knurls

32, 36, 45, 60

Packet Qty

100, 200

Finish

Zinc Yellow

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Contact Washers are conical shaped lock washers formed with a ribbed top surface.

The conical shape exerts locking force 360° around the underside of the screw head or nut. The ribbed top surface further enhances the locking force and resists the torqued fastener connection potential for loosening under pressure and vibration.