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TRAPPIST-1 Orrery
Ferguson's Mechanical Paradox Orrery
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Cometarium
Nearest Stars
Mechanical Paradox Demonstrator
Napier's Bones
Genaille Lucas Calculating Rulers
Machinist's Clock
ThinkWeights
Lever Paradox
HP-01 Battery Tool
AWG Copper Wire Properties
Center Drill Dimensions
Drill Size & Decimal Equivalents
Imperial Tap Chart
Keyway Dimensions
Melting Points
Metric Tap Chart
O-Ring Sizes
Pipe Threads
Screw Extractors
Sheet Metal Gauges & Weights
Socket Head Cap Screws
Taper Calculations
Taper Pins
Taper Shank Dimensions
Washer Sizes
Wire Gauges
Wood Screw Dimensions
Pipe Threads
American Standard
British Standard
Nominal OD
Threads per Inch
Nominal Outside Pipe Diameter (inches)
Approximate Length of Thread (inches)
Approximate Total Thread Makeup (inches)
NPT
Straight NPS
Threads per Inch
Drill
Drill with Tapered Reamer
Drill w/o Tapered Reamer
1/16
27
0.313
15/64
D
1/4
28
G
1/8
27
0.405
3/8
1/4
21/64
R
S
28
11/32
1/4
18
0.540
5/8
3/8
27/64
7/16
29/64
19
15/32
3/8
18
0.675
5/8
3/8
9/16
37/64
19/32
19
39/64
1/2
14
0.840
3/4
7/16
11/16
23/32
47/64
14
3/4
5/8
-
-
-
-
-
14
53/64
3/4
14
1.050
3/4
1/2
57/64
59/64
15/16
14
31/32
7/8
-
-
-
-
-
14
1-7/64
1
11.5
1.315
7/8
9/16
1-1/8
1-5/32
1-3/16
11
1-7/32
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