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Fitting Guide

Dimensions Hex & Square & Round Head Plugs ASME B16.11

Hex Plug - NPS 1/2-4

NPS Minimum Length
E
Minimum Hex Height
J
Nominal
F
1/2 14 8 22
3/4 16 10 27
1 19 10 35
1.1/4 21 14 44.5
1.1/2 21 16 51
2 22 18 63.5
2.1/2 27 19 76
3 28 21 89
4 32 25 117.5

Dimensions are in millimeters unless otherwise indicated.

Hex Head Plug

Square Head Plug - NPS 1/2-4

NPS Minimum Length
E
Minimum Square Height
C
Minimum Width Flats
B
1/2 14 10 14
3/4 16 11 16
1 19 13 21
1.1/4 21 14 24
1.1/2 21 16 28
2 22 18 32
2.1/2 27 19 36
3 28 21 41
4 32 25 65

Dimensions are in millimeters unless otherwise indicated.

Square Head Plug

Round Head Plug - NPS 1/2-4

NPS Minimum Length
A
Nominal Head Diameter
D
Minimum Length
E
1/2 44 21 14
3/4 44 27 16
1 51 33 19
1.1/4 51 43 21
1.1/2 51 48 21
2 64 60 22
2.1/2 70 73 37
3 70 89 28
4 76 114 32

Dimensions are in millimeters unless otherwise indicated.

Round Head Plug
PP
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