#1 × 72 TPI External (Bolt) Thread Specifications
ASME Unified National Fine (UNF) per ASME B1.1 — bolt/screw dimensions
Applications
General purpose
Industrial (US)
Technical Specifications
Parameter
Notation
Value
Threads Per Inch
n
72.0 TPI
Pitch
P
0.0139 in
Major Diameter
d
0.0724 in
Pitch Diameter
d2
0.0634 in
UNR Minor Dia (Max)
d1_max
0.0559 in
Allowance
es
0.0006 in
Tolerance Class
Class
2A
Thread Height
H
0.0120 in
Thread Depth
h3
0.0085 in
Crest Width
f / (P/8)
0.0017 in
Root Width
r / (P/4)
0.0035 in
Tap Drill
Drill
0.0591 in
Related Thread Sizes
#1 × 64 TPI (UNC)
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