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Steel, Medium Series

Belleville Washer

NFE 25-511 "M"

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SKU: 00-WB-Z

Detail & Specs

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Metric Steel Belleville Washer, "M" Medium Outer Diameter

Ribbed / "Rip-Lock" Pattern

Belleville washers are made from spring steel have a concave shape to maintain compressed tension. The Rip-Lock pattern on the top surface enhances the locking force and further prevents against loosening due to vibration or pressure.

Belleville washers can be used in tandem, one at the nut end and one at the bolt head end of the fastener connection. Use with Class 8.8 and Class 10.9 bolts and screws.

Also known as serrated conical, coned-disc, cupped spring lock washer

AFNOR NFE 25-511, "M" Medium Form (Most Common)
French National Standard

Coated Finish
Geomet and other zinc flake finishes are the environmentally friendly, VOC compliant replacement for Dacromet Coating. These finishes are water based with a chrome free coating that is anticorrosive and suitable for high temperatures, greater than 572 F. Zinc Flake finishes do not cause hydrogen embrittlement, which makes them suitable for high tensile fasteners. Salt Spray Resistance > 720 hours.

Special Order Variations
Alternative Forms:
AFNOR NFE 25-511, "S" Small Form (Reduced Outer Diameter)
AFNOR NFE 25-511, "L" Large Form (Oversized Outer Diameter)
DIN 6796 Non-Serrated Conical Spring Washer