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3/8 Cap Nuts (ASME B18. 2.2)

Acorn Nuts, also referred to as Crown Hex Nuts, Blind Nuts, Cap Nuts, Domed Cap Nuts, or Dome Nuts, are nuts with a domed end on one side to cover exposed internal threading. The name acorn nut comes from its shape.

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
BHAMALCap Nut (Acorn Nut)SteelZinc/Clear3/8-163/8-16 acorn cap nut zn b18.2.2509
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BHAMALCap Nut (Acorn Nut)SteelNickel3/83/8 washer cap nut nickel plated b18.2.2550
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AbabaCACap Nut (Acorn Nut)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-163/8-16 acorn cap nut s/s b18.2.22650
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AbabaCACap Nut (Acorn Nut)SteelNickel3/8-163/8-16 acorn cap nut stl nkl b18.2.2594
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AbabaCACap Nut (Acorn Nut)SteelBlack Oxide3/8-163/8-16 acorn cap nut stl blk ox wax b18.2.21150
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AbabaCACap Nut (Acorn Nut)316, 317, A4 StainlessPlain3/8-163/8-16 acorn cap nut 316 s/s b18.2.25
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GLFOHCap Nut (Acorn Nut)SteelNickel3/8-163/8-16 acorn nut stl nkl b18.2.2 () () ()1152
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AbabaCACap Nut (Acorn Nut)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-163/8-16 acorn cap nut s/s b18.2.250
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AbabaCACap Nut (Acorn Nut)SteelNickel3/8-163/8-16 acorn cap nut stl nkl b18.2.2200
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AbabaCACap Nut (Acorn Nut)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-243/8-24 acorn cap nut s/s b18.2.220
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AbabaCACap Nut (Acorn Nut)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-243/8-24 acorn cap nut s/s b18.2.210
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SIIINCap Nut (Acorn Nut)SteelNickel3/8-163/8-16 acorn nut 2 piece nickel plated b18.2.2120
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JET FITTINGCACap Nut (Acorn Nut)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 13/8-16 acorn nut s/s stl 304 unc 1 569054 b18.2.2520
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JET FITTINGCACap Nut (Acorn Nut)SteelBlack Oxide3/8-163/8-16 closed end acorn nuts low crown steel black oxide 37NCB b18.2.2900
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StandardMACap Nut (Acorn Nut)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-243/8-24 cap nut 18-8 stainless steel b18.2.25500
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StandardMACap Nut (Acorn Nut)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-163/8-16 cap nut 18-8 stainless steel b18.2.2563
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QFCTXCap Nut (Acorn Nut)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/83/8nc 18-8ss cap nut b18.2.266
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QFCTXCap Nut (Acorn Nut)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/83/8nc 18-8ss cap nut b18.2.260
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QFCTXCap Nut (Acorn Nut)SteelNickel3/8-163/8-16 low crown cap nut steel nickel b18.2.21250
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QFCTXCap Nut (Acorn Nut)SteelNickel3/8-163/8-16 low crown cap nut steel nickel b18.2.22746
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B & K FASTPACap Nut (Acorn Nut)SteelPlain3/8-163/8-16 acorn nuts high crown plain b18.2.217
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B & K FASTPACap Nut (Acorn Nut)SteelNickel3/8-163/8-16 acorn nuts (cap) nickel b18.2.2195
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B & K FASTPACap Nut (Acorn Nut)SteelZinc/Clear3/8-163/8-16 acorn nuts low crown zinc b18.2.2845
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B & K FASTPACap Nut (Acorn Nut)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-163/8-16 acorn nuts 18-8 stainless b18.2.269
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General FMICap Nut (Acorn Nut)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-163/8-16 locking acorn nuts ss b18.2.2712
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OSSCORICap Nut (Acorn Nut)SteelPlain3/83/8 stud palnut washer cap type-b18.2.26,925
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OSSCORICap Nut (Acorn Nut)316, 317, A4 StainlessPlain3/8-163/8-16 acorn cap nut 316 s/s b18.2.25
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OSSCORICap Nut (Acorn Nut)SteelZinc/Clear3/8-243/8-24 acorn cap nut-high crown plated b18.2.263
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Bostwick INCap Nut (Acorn Nut)SteelZinc/Clear3/8-243/8-24 acorn cap nut (2 piece) zinc b18.2.258
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Ace Bolt MSCap Nut (Acorn Nut)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-163/8-16 ac cap nut h/crown (9/16 a/f) 18-8 ss b18.2.2806
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PerigeeMICap Nut (Acorn Nut)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated3/8-16 x 9/16 x 25/323/8-16 x 9/16 x 25/32 high crown cap nut b18.2.288
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PerigeeMICap Nut (Acorn Nut)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated3/8-24 x 9/16 x 25/323/8-24 x 9/16 x 25/32 high crown cap nut b18.2.2170
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PerigeeMICap Nut (Acorn Nut)SteelCadmium3/8-16 x 9/16 x .7803/8-16 x 9/16 x .780 high crown cap nut b18.2.244
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PerigeeMICap Nut (Acorn Nut)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated3/8-24 x 9/16 x 5/83/8-24 x 9/16 x 5/8 low crown cap nut b18.2.221
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PerigeeMICap Nut (Acorn Nut)400 Stainless (405, 410,416,420,430 etc.)Passivated3/8-16 x 9/16 x 5/83/8-16 x 9/16 x 5/8 low crown cap nut b18.2.232
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JET FITTINGCACap Nut (Acorn Nut)SteelNickel3/8-16 x 23/8-16 hex acorn 2-piece nut steel nickel b18.2.2150
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JET FITTINGCACap Nut (Acorn Nut)SteelBlack Oxide3/8-163/8-16 closed end acorn nuts low crown steel black oxide b18.2.2900
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THRDFASTMSCap Nut (Acorn Nut)SteelZinc/Clear3/8-16acorn cap nut b18.2.21
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THRDFASTALCap Nut (Acorn Nut)SteelPlain3/8-16acorn cap nut b18.2.230
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THRDFASTFLCap Nut (Acorn Nut)SteelZinc/Clear3/8-16acorn cap nut b18.2.21
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THRDFASTOKCap Nut (Acorn Nut)SteelZinc/Clear3/8-16acorn cap nut b18.2.2250
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WSBKYCap Nut (Acorn Nut)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16q/nut acorn (18-8) 3/8-16 b18.2.22,980
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All SizeTXCap Nut (Acorn Nut)SteelPlain3/8-163/8-16 cap nut acorn b18.2.298
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FACCAOntCap Nut (Acorn Nut)SteelNickel3/8-24f4 acorn cap nut 3/8-24 unf (5/8 a/f x 1/2 th) steel nickel plated b18.2.232,500
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