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5/16-18 Castellated Nuts

Hex Castle Nuts or Castellated Nuts have notches on one end, which resemble the serrated tops of castle parapets. These nuts are used with a bolt with cross-drilled holes, so that a cotter pin can pass through the nut and into a hole in a bolt shank, thus preventing the nut from loosening. The notched end is turned down slightly, allowing the cotter pin to be bent around the nut. Often used in machinery, shafts and automotive applications.

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Search Results Sponsored by Perigee Manufacturing, your source for Castellated Nuts. For more results, visit   perigeemfg.com
SupplierLocTypeMaterialFinishSizeDescriptionQty 
PerigeeMICastle Nut (Hex)Grade APlain5/16-18 x 1/2 x 21/645/16-18 x 1/2 x 21/64 hex castle nut b18.2.248
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WeaverWACastle Nut (Hex)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-185/16-18 castle nut 18-8 ss30
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MidStatesMICastle Nut (Hex)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18castle nut 18-850
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DeltaTXCastle Nut (Hex)SteelZinc/Clear5/16-18fin castle nut steel zinc 5/16-18100
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All SizeTXCastle Nut (Hex)SteelPlain5/16-185/16-18 slotted castle nut plain b18.2.24,690
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Kanebridge ILCastle Nut (Hex)SteelZinc/Clear5/16-185/16-18 castle nut zinc7.500
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PerigeeMICastle Nut (Hex)Grade APlain5/16-18 x 1/2 x 21/645/16-18 x 1/2 x 21/64 hex castle nut b18.2.248
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HayesCACastle Nut (Hex)BrassPlain5/16-185/16-18 castle nut brass58
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HayesCACastle Nut (Hex)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-185/16-18 castle nut 18-8ss42
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Fastener OHCastle Nut (Hex)SteelPlain5/16-18 x 1.8castle nut 5/16-18 1.8 50
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