Castle Nuts 304 Stainless Steel

Castle Nuts 304 Stainless Steel Product Video

Stainless Steel Castle Nuts

Slotted Nuts, also called Castellated Nuts, in 304 Stainless Steel

  • Used with a cotter pin
  • Notched on one side
  • Torque the nut then aligns with the closest hole
  • Used with a bolt or axle that has a hole in it

A Castle nut, castellated nut, or slotted nut is normally used with a Cotter Pin to create a locking fastener assembly that cannot be loosened due to accidental vibration. It is common to see this type of nut on vehicles and machinery where vibration is frequent.

Nut Sizes Width Across Flats Overall Height
#10 0.375" REF 0.248" REF
1/4" 0.434" REF 0.281" REF
5/16" 0.499" REF 0.326" REF
3/8" 0.562" REF 0.410" REF
7/16" 0.686" REF 0.456" REF
1/2" 0.745" REF 0.569" REF
5/8" 0.934" REF 0.724" REF
3/4" 1.125" REF 0.820" REF
7/8" 1.126" REF 0.814" REF
1" 1.498" REF 1.005" REF
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NA = "Not Sold In Single Quantity"

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Product Specifications
Corrosion Resistant
Drive Style
External Hex
Stainless Steel
Product Type
Castle Nut
System of Measurement (Unit)
Thread Direction
Right Hand
Tolerance (IFI)
Actual measurements may vary slightly +/- depending on production run within IFI Tolerances

Product Video

Castle Nuts 304 Stainless Steel Product Video