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Castle Nut

A4-50 Stainless

DIN 935

SKU: 00-Y935-A4
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Castle Nut - A4-50 Stainless DIN 935

Castle nuts are considered a positive locking device when secured to a fastener using a cotter (split) pin. They ensure that a fastener does not loosen from vibrations.

Commonly used in low-torque applications - industries include automotive, aircraft and locomotive.

Also known as castellated nut or slotted nut because of the slots or "notches" cut into one side.

Material: A4 Stainless


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.


Commonly used in wet environments. Popular across a wide range of industries: automotive, agriculture, photographic, medical / surgical, food processing, robotics, architectural detailing, construction, HVAC, healthcare, sanitary, transportation, clean energy, etc

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