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ASME B18.2.2 TABLE 12 Standard Dimensions for Hex flange and large hex flange nuts. Inch series

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Hex flange and large hex flange nuts.

Dimensional Drawing and Technical Diagrams

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Key Dimensions and Technical Parameters

Dimensions in inches (1 inch=25.4 mm) sourceASME B18.2.2 table 12- hex flange nuts

Publication date: 2010
d Thread size

UNC (nr of threads x inch)

UNF (nr of threads x inch)

 F max G min B min H basic K min J min
inches mm
6 3.51 32 40 0.313 0.342 0.408 0.164 0.02 0.10
8 4.17 32 36 0.344 0.381 0.452 0.195 0.02 0.13
10 4.83 24 32 0.375 0.416 0.480 0.211 0.03 0.13
12 5.49 24 28 0.438 0.488 0.574 0.229 0.04 0.14
1/4
 6.35 20 28 0.438 0.488 0.574 0.229 0.04 0.14
5/16
 7.94 18 24 0.5 0.557 0.66 0.276 0.04 0.17
3/8
 9.53 16 24 0.56 0.628 0.728 0.339 0.04 0.23
7/16
 11.11 14 20 0.688 0.768 0.91 0.385 0.04 0.26
1/2
 12.70 13 20 0.75 0.84 1 0.447 0.05 0.31
9/16
 14.29 12 18 0.875 0.982 1.155 0.495 0.05 0.35
5/8
 15.88 11 18 0.938 1.051 1.25 0.557 0.05 0.4
3/4
 19.05 10 16 1.125 1.24 1.46 0.651 0.06 0.46

Dimensions in inches (1 inch=25.4 mm) sourceASME B18.2.2 table 12- large hex flange nuts

Publication date: 2010
d Thread size

UNC (nr of threads x inch)

UNF (nr of threads x inch)

 F basic
 G min
 B min H basic K min J min
inches mm
1/4
 6.35 20 28 0.438 0.488 0.7 0.297 0.04 0.15
5/16
 7.94 18 24 0.5 0.557 0.79 0.359 0.04 0.2
3/8
 9.53 16 24 0.56 0.628 0.885 0.398 0.04 0.24
7/16
 11.11 14 20 0.69 0.768 1.1 0.453 0.04 0.26
1/2
 12.70 13 20 0.75 0.84 1.175 0.5 0.06 0.29
9/16
 14.29 12 18 0.875 0.98 1.26 0.562 0.06 0.37
5/8
 15.88 11 18 0.94 1.05 1.28 0.62 0.06 0.42

Reproduced by permission of DIN Deutsches Institut für Normung e. V. The definitive version for the implementation of this standard is the edition bearing the most recent date of issue, obtainable from Beuth Verlag GmbH, Burggrafenstraße 6, 10787 Berlin, Germany.
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