Transcription of ASME/ANSI B18.2.2 FORMULAS FOR NUT DIMENSIONS …
1 (R1999) FORMULAS FOR NUT DIMENSIONSNUTSAPPENDIX IINut TypeSquareHex FlatHex FlatJamHex andHexSlottedHex JamHex Thick,and HexThickSlottedHeavySquareHeavy HexFlatHeavy HexFlat JamHeavy HexandHeavy HexSlottedHeavy HexJamSee NotesNut Size1/4 thru 5/83/4 thru 1-1/21-1/8 thru 1-1/21-1/81-1/4 thru 1-1/21/45/1 6 thru 5/83/4 thru 1-1/81-1/4 thru 1-1/21/45/1 6 thru 5/83/4 thru 1-1/81-1/4 thru 1-1/21/45/1 6 thru 5/83/4 thru 1-1/21/4 thru 1-1/21-1/8 thru 41/4 thru 1-1/81-1/4 thru 2-1/42-1/2 thru 41/4 thru 1-1/81-1/4 thru 22-1/4 thru 33-1/4 thru 41/4 thru 1-1/81-1/4 thru 22-1/42-1/2 thru 33-1/4 thru 4 Width Across FlatsBasicF = + = = DF = 0F = = D + = DF = = DF = 0 + = = DF = DF = 0 + = = 1 .500 DF = 0 + = + = D + = 0 + 0. 125F = D + = 0 + = D + = D + = + = D + = D + = + = D + = D + (Minus) D + D + D + 5 D + 50 + + DNut ThicknessBasicH = DH = DH = DH = D + = D + = DH = DH = = = See TableH = See TableH = D + = D + = See TableH = See TableH = See TableH = 1.
2 000 DH = 1 .000 DH = D + = + 25H = D + = D- = 1. 000 D- = = = D + = D + = D + = D + = + (Plus or Minus) D + D + + D + D + D + + D + + D + + + D + D + D + + + * D + * + " D + " + " + D + + D + + D + D + + D + Across CornersLimitsMaxG = (Max F)MinG = 1. 373 (MinF)- = (Max F)MinG= (MinF)MaxG= 1. 1547 (Max F)MinG = (MinF)MaxG= (Max F)MinG = (MinF)MaxG = (Max F)MinG= (MinF)MaxG = (Max F)Min G - 1 14 (Min F)MaxG = (Max F)Min G= (MinF) G = 547 (Max F)Min G= (MinF)Max G = 547 (Max F)Min G - 1 14 (Min F)MaxG = (Max F)MinG= (MinF)Max G = 547 (Max F)Min G - 1 14 (Min F)NOTES:1. Adjusted to 1/4 thru 1 in. sizes adjusted to sixty-fourths. 1-1/8 thru 2-1/2 in. sizes adjusted upward to thirty-seconds. 2-3/4 thru 4 in. sizes adjustedupward to sixteenths.
3 * 3. Plus tolerance only. Minus tolerance adjusted so that minimum thickness is equal to minimum thickness of Heavy Hex Nut.**4. Plus tolerance only. Minus tolerance adjusted so that minimum thickness is equal to minimum thickness of Heavy Hex Jam : D = Nominal nut size or basic diameter of the = Width across = Width across corners. 2003 Industrial Fasteners InstituteD 21
