FCH News

#4 Square Nuts

Square Nuts are just four-sided nuts, but compared to standard hex nuts, square nuts have a greater surface in contact with the part being fastened, and therefore provide greater resistance to loosening. Square nuts are typically mated with square-headed bolts.

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Buy Square Nuts from one of our FCH Network Members
SupplierLocTypeMaterialFinishSizeDescriptionQty 
Cal FastenrsCASquare NutBrassPlain#4-40 1/24-40 square nut 1/2 hard brass rev a .187 a.f. x .075 thk 4-40 thread unc-2b nut | nut | nut1,710
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MAINSOURCNHSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-404-40 square nut 18-8 ss218
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MESAFASTCASquare NutSteelZinc/Clear#4-40square nut1,380.0
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Cal FastenrsCASquare NutBrassPlain#4-40 1/24-40 square nut 1/2 hard brass rev a .187 a.f. x .075 thk 4-40 thread unc-2b1,710
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AmericanNYSquare NutSteelZinc/Clear#4-40square nut pl4100
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SISAZSquare NutSteelZinc/Clear#4-404-40 square m/s nut steel zinc463
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