Belleville Washers maintain compressed tension, with grooved top surfaces that enhance the locking force, preventing loosening. Available in 3 Outer Diameter configurations:
Medium "M" Series Most Common / Medium Outer Diameter.
Small "S" Series Decreased / Small Outer Diameter
Large "L" Series Increased / Larger Outer Diameter
A4 / 316 Stainless Steel fasteners are "marine grade" corrosion resistant; suitable for salt water applications. A4 fasteners also offer increased resistance to chemicals when compared with A2 stainless fasteners.