1/2 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 5Zinc/Yellow1/2-20 x 3/4 x 9/16hex castle nut b18.2.213
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PerigeeMICastle Nut (Hex)Grade 5Zinc/Yellow1/2-20 x 3/4 x 9/16hex castle nut b18.2.2159
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PerigeeMICastle Nut (Hex)Grade 5Zinc/Clear1/2-20 x 3/4 x 9/16hex castle nut b18.2.2100
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PerigeeMICastle Nut (Hex)Grade 5Zinc/Yellow1/2-20 x 3/4 x 9/16hex castle nut b18.2.2115
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Buy Castellated Nuts from one of our FCH Network Partners
Zoro Tools Inc.Castle Nut (Hex)Grade 2Zinc/Clear1 1/2-61-1/2-6 grade 2 zinc plated finish low carbon steel round slotted castle nut 10 pk.
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Zoro Tools Inc.Castle Nut (Hex)Grade 2Zinc/Clear1/2-131/2-13 grade 2 zinc plated finish low carbon steel round slotted castle nut 25 pk.
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Zoro Tools Inc.Castle Nut (Hex)Grade 2Zinc/Clear1/2-201/2-20 grade 2 zinc plated finish low carbon steel round slotted castle nut 25 pk.
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Zoro Tools Inc.Castle Nut (Hex)SteelZinc/Clear1 1/2-121-1/2-12 grade 2 zinc plated finish low carbon steel round slotted castle nut 5 pk.
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Buy Castellated Nuts from one of our FCH Network Members
SunPackFLCastle Nut (Hex)SteelZinc/Clear1/2-13castle lock nut5
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HayesCACastle Nut (Hex)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-131/2-13 castle nut 18-8ss3
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METRO INDOHCastle Nut (Hex)SteelPlain1/2-20castle nut sae167
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NutsBoltsNECastle Nut (Hex)SteelPlain1/2-201/2-20 castle nut9
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CenturyFLCastle Nut (Hex)300 Stainless (A1,A2, 18-8,304,310 etc.)Cadmium/Yellow1/2-20an310c814
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CenturyFLCastle Nut (Hex)SteelPlain1/2-201/2-20 castle nut15
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Future FastenerTXCastle Nut (Hex)SteelBlack Oxide1/2-201/2-20 finished castle nut blk216
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PerigeeMICastle Nut (Hex)Grade 5Zinc/Yellow1/2-20 x 3/4 x 9/16hex castle nut b18.2.213
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PerigeeMICastle Nut (Hex)Grade 5Zinc/Yellow1/2-20 x 3/4 x 9/16hex castle nut b18.2.2159
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PerigeeMICastle Nut (Hex)Grade 5Zinc/Clear1/2-20 x 3/4 x 9/16hex castle nut b18.2.2100
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PerigeeMICastle Nut (Hex)Grade 5Zinc/Yellow1/2-20 x 3/4 x 9/16hex castle nut b18.2.2115
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PerigeeMICastle Nut (Hex)SteelCadmium/Yellow1/2-20castellated airframe nut an310-8 b18.2.2400
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PerigeeMICastle Nut (Hex)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-20castellated hex shear nut an320c8 b18.2.22430
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PerigeeMICastle Nut (Hex)SteelCadmium/Yellow1/2-20hex slotted jam a/f nut an320-8 b18.2.21942
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PerigeeMICastle Nut (Hex)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-20castellated hex shear nut an320c8 b18.2.21153
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PerigeeMICastle Nut (Hex)Grade AZinc/Clear1/2-20 x 3/4 x 9/16hex castle nut b18.2.249
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PerigeeMICastle Nut (Hex)SteelCadmium/Yellow1/2-20castellated airframe nut an310-8 b18.2.23525
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DeltaTXCastle Nut (Hex)SteelZinc/Clear1/2-20fin castle nut steel zinc nf 1/2-20553
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DeltaTXCastle Nut (Hex)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13fin castle nut 18-8 sst 1/2-1354
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StandardMACastle Nut (Hex)BrassPlain1/2-131/2-13 castle nut brass b18.2.2inquire
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HBBOLTCACastle Nut (Hex)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13castle nut 18-8ss153
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HBBOLTCACastle Nut (Hex)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-20castle nut 18-8ss136
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LibertyILCastle Nut (Hex)SteelNickel1/2-20hex castle nut plate plate75
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LibertyILCastle Nut (Hex)SteelZinc/Clear1/2-20hex castle nut56
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ISSCOMOCastle Nut (Hex)Grade 2Zinc/Clear1/2-20hex castle nut800
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MFSKSCastle Nut (Hex)SteelPlain1/2-20castle nut1679
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MFSKSCastle Nut (Hex)SteelZinc/Clear1/2-20thin castle nut, mag inspected1276
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GUIDONNJCastle Nut (Hex)Grade 2Zinc/Clear1/2-2019
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GLFOHCastle Nut (Hex)SteelCadmium/Yellow1/2-201/2-20 castellated nut--cad ii AN320-8365
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GLFOHCastle Nut (Hex)Grade 5Plain1/2-20castle nut stl50
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GLFOHCastle Nut (Hex)SteelCadmium/Yellow1/2-20cae nut mil-spec mil-spec AN310-8398
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Kanebridge ILCastle Nut (Hex)SteelZinc/Clear1/2-131/2-13 castle nut zinc3.750
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Kanebridge ILCastle Nut (Hex)SteelZinc/Clear1/2-201/2-20 castle nut zinc3.750
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Kanebridge ILCastle Nut (Hex)Grade 5Zinc/Clear1/2-201/2-20 castle nut grade 5 zinc3.750
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All SizeTXCastle Nut (Hex)SteelPlain1/2-201/2-20 slotted castle nut b18.2.21,261
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All SizeTXCastle Nut (Hex)SteelPlain1/2-201/2-20 slotted high castle nut b18.2.21,271
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TimberlineCOCastle Nut (Hex)SteelPlain1/2-20hx cstl nut 1/2-206
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Alma BoltMICastle Nut (Hex)SteelPlain1/2-20SAE castle nut981
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