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5/16 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.

42 results, (click on any line for more information)

Search Results Sponsored by Perigee Manufacturing, your source for Castellated Nuts. For more results, visit   perigeemfg.com
SupplierLocTypeMaterialFinishSizeDescriptionQty 
PerigeeMICastle Nut (Hex)300 Stainless (A1,A2, 18-8,304,310 etc.)Cadmium/Yellow5/16-245/16-24 x 1/2 x 21/64 hex castellated airframe nut b18.2.21095
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PerigeeMICastle Nut (Hex)300 Stainless (A1,A2, 18-8,304,310 etc.)Cadmium/Yellow5/16-245/16-24 x 1/2 x 21/64 hex castellated airframe nut b18.2.24863
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PerigeeMICastle Nut (Hex)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-245/16-24 x 1/2 x 3/16 hex castellated shear nut b18.2.22960
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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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Buy Castellated Nuts from one of our FCH Network Members
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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CNBILCastle Nut (Hex)SteelZinc/Clear5/16-24castle nut1371
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YANKEENHCastle Nut (Hex)SteelZinc/Clear5/16-245/16-24 hex castle slotted nut zinc pltd34
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WeaverWACastle Nut (Hex)SteelZinc/Clear5/16-245/16-24 castle nut zinc140
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METRO INDOHCastle Nut (Hex)SteelPlain5/16-24castle nut sae75
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ACCURATEILCastle Nut (Hex)SteelPlain5/16-24castle nuts63
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CascadeORCastle Nut (Hex)SteelPlain5/16-24castle s b18.2.22100
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SISAZCastle Nut (Hex)SteelCadmium/Yellow5/16-24castle nut low-height steel cad ii plated AN320-5200
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CenturyFLCastle Nut (Hex)300 Stainless (A1,A2, 18-8,304,310 etc.)Cadmium/Yellow5/16-24an310c5 nut 9
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NutsBoltsNECastle Nut (Hex)SteelPlain5/16-245/16-24 castle nut165
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DeltaTXCastle Nut (Hex)SteelZinc/Clear5/16-24fin castle nut steel zinc nf 5/16-24 (FINE THREAD)3084
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NorthernMNCastle Nut (Hex)Grade 5Plain5/16-24s/o 5/16-24 nf gr5 castle nut plain pkg65
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All SizeTXCastle Nut (Hex)SteelPlain5/16-245/16-24 slotted castle nut b18.2.23,571
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All SizeTXCastle Nut (Hex)SteelPlain5/16-245/16-24 slotted castle nut plain b18.2.2458
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AIHAZCastle Nut (Hex)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-245/16-24 unf 3a nut s/s 304ss AN310C513
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Kanebridge ILCastle Nut (Hex)SteelZinc/Clear5/16-245/16-24 castle nut zinc7.500
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LibertyILCastle Nut (Hex)SteelZinc/Clear5/16-24hex castle nut1,970
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HBBOLTCACastle Nut (Hex)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-24castle nut 18-8113
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ASMCILCastle Nut (Hex)Grade 5Zinc/Clear5/16-24fine gr5 hex castle nut med carb zp140
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Kanebridge ILCastle Nut (Hex)Grade 5Zinc/Clear5/16-245/16-24 castle nut grade 5 zinc7.500
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PerigeeMICastle Nut (Hex)300 Stainless (A1,A2, 18-8,304,310 etc.)Cadmium/Yellow5/16-245/16-24 x 1/2 x 21/64 hex castellated airframe nut b18.2.21095
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PerigeeMICastle Nut (Hex)300 Stainless (A1,A2, 18-8,304,310 etc.)Cadmium/Yellow5/16-245/16-24 x 1/2 x 21/64 hex castellated airframe nut b18.2.24863
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PerigeeMICastle Nut (Hex)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-245/16-24 x 1/2 x 3/16 hex castellated shear nut b18.2.22960
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PerigeeMICastle Nut (Hex)400 Stainless (405, 410,416,420,430 etc.)Passivated5/16-24 x 1/2 x 21/645/16-24 x 1/2 x 21/64 hex castle nut b18.2.2298
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NorthernMNCastle Nut (Hex)Grade 5Zinc/Clear5/16-24nf gr5 castle nut pkg48
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HayesCACastle Nut (Hex)SteelZinc/Clear5/16-245/16-24 castle nut zinc75
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NAPPCOTXCastle Nut (Hex)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-24hex castle nut s/s 18-8 5/16-24 (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD))115
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OSSCORICastle Nut (Hex)SteelPlain5/16-245/16-24 castle nut b18.2.295
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OSSCORICastle Nut (Hex)SteelZinc/Clear5/16-245/16-24 castle nut plated b18.2.23
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CenturyNYCastle Nut (Hex)SteelCadmium/Yellowan310-5 castle nut5
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CenturyNYCastle Nut (Hex)SteelCadmium/Yellowan320-5 nut q2c5
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THRDFASTFLCastle Nut (Hex)SteelPlain5/16nf-24 castle nut b18.2.286
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CenturyFLCastle Nut (Hex)SteelCadmium/Yellow5/16-24an310-5 castle nut 5
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CenturyFLCastle Nut (Hex)SteelCadmium/Yellow5/16-24an320-5 nut q2c (NUT Q2C) (NUT Q2C) 5
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