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TRAPPIST-1 Orrery
Ferguson's Mechanical Paradox Orrery
Miniature Inner Planet Orrery
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
Imperial Tap Chart
Screw Size
Specifications
Tap Drill
Clearance Drill
Aluminum, Brass & Plastics
Steel, Stainless Steel & Iron
Close Fit
Standard Fit
75% Thread
50% Thread
No. or Dia.
Major Dia.
TPI
Series
Minor Dia.
Drill Size
Decimal
Drill Size
Decimal
Drill Size
Decimal
Drill Size
Decimal
000
.0340
120
NS
.0232
71
.026
71
.0260
65
.0350
62
.0380
00
0.0470
90
NS
.0334
65
.0350
61
.0390
3/64
0.0469
55
0.0520
0
0.060
80
NF
.0465
3/64
0.0469
55
0.0520
52
0.0635
50
0.070
1
0.073
56
NS
.0498
54
0.055
48
0.076
46
0.081
64
NC
0.0538
53
0.0595
1/16
0.0625
72
NF
0.056
53
0.0595
52
0.0635
2
0.086
56
NC
0.0641
50
0.07
49
0.073
43
0.089
41
0.096
64
NF
0.0668
50
0.07
48
0.076
3
0.099
48
NC
0.0734
47
0.0785
44
0.086
37
0.104
35
0.110
56
NF
0.0771
45
0.082
43
0.089
4
0.112
40
NC
0.0813
43
0.089
41
0.096
32
0.116
30
0.1285
48
NF
0.0864
42
0.0935
40
0.098
5
0.125
40
NC
0.0943
38
0.1015
9/64
0.1094
30
0.1285
29
0.136
44
NF
0.0971
37
0.104
35
0.110
6
0.138
32
NC
0.0997
36
0.1065
32
0.116
27
0.144
25
0.1495
40
NF
0.1073
33
0.113
31
0.120
8
0.164
32
NC
0.1257
29
0.136
27
0.144
18
0.1695
16
0.177
36
NF
0.1299
29
0.136
26
0.147
10
0.190
24
NC
0.1389
25
0.1495
20
0.161
9
0.196
7
0.201
32
NF
0.1517
21
0.159
18
0.1695
12
0.216
24
NC
0.1649
16
0.177
12
0.189
2
0.221
1
0.228
28
NF
0.1722
14
0.182
10
0.1935
32
NEF
0.1777
13
0.185
9
0.196
1/4
0.250
20
NC
0.1887
7
0.201
7/32
0.2188
F
0.257
H
0.266
28
NF
0.2062
3
0.213
1
0.228
32
NEF
0.2117
7/32
0.2188
1
0.228
5/16
0.3125
18
NC
0.2443
F
0.257
J
0.277
P
0.323
Q
0.332
24
NF
0.2614
I
0.272
9/32
0.2812
32
NEF
0.2742
9/32
0.2812
L
0.290
3/8
0.375
16
NC
0.2983
5/16
0.3125
Q
0.332
W
0.386
X
0.397
24
NF
0.3239
Q
0.332
S
0.348
32
NEF
0.3367
11/32
0.3438
T
0.358
7/16
0.4375
14
NC
0.3499
U
0.368
25/64
0.3906
29/64
0.4531
15/32
0.4687
20
NF
0.3762
25/64
0.3906
13/32
0.4062
28
NEF
0.3937
Y
0.404
Z
0.413
1/2
0.500
13
NC
0.4056
27/64
0.4219
29/64
0.4531
33/64
0.5156
17/32
0.5312
20
NF
0.4387
29/64
0.4531
15/32
0.4688
28
NEF
0.4562
15/32
0.4688
15/32
0.4688
9/16
0.5625
12
NC
0.4603
31/64
0.4844
33/64
0.5156
37/64
0.5781
19/32
0.5938
18
NF
0.4943
33/64
0.5156
17/32
0.5312
24
NEF
0.5114
33/64
0.5156
17/32
0.5312
5/8
0.625
11
NC
0.5135
17/32
0.5312
41168
0.5625
41/64
0.6406
21/32
0.6562
18
NF
0.5568
37/64
0.5781
19/32
0.5938
24
NEF
0.5739
37/64
0.5781
19/32
0.5938
11/16
0.6875
24
0.6364
41/64
0.6406
21/32
0.6562
45/64
0.7031
23/32
0.7188
3/4
0.750
10
NC
0.6273
21/32
0.6562
11/16
0.6875
49/64
0.7656
25/32
0.7812
16
NF
0.6733
11/16
0.6875
45/64
0.7031
20
NEF
0.6887
45/64
0.7031
23/32
0.7188
13/16
0.8125
20
0.7512
49/64
0.7656
25/32
0.7812
53/64
0.8281
27/32
0.8438
7/8
0.875
9
NC
0.7387
49/64
0.7656
51/64
0.7969
57/64
0.8906
29/32
0.9062
14
NF
0.7874
13/16
0.8125
53/64
0.8281
20
NEF
0.8137
53/64
0.8281
27/32
0.8438
15/16
0.9375
20
0.8762
57/64
0.8906
29/32
0.9062
61/64
0.9531
31/32
0.9688
1
1.000
8
NC
0.8466
7/8
0.875
59/64
0.9219
1-1/64
1.0156
1-31/32
1.0313
12
NF
0.8978
15/16
0.9375
61/64
0.9531
20
NEF
0.9387
61/64
0.9531
31/32
0.9688
1-1/16
1.0625
18
NEF
0.9943
1
1
1-1/64
1.0156
1-5/64
1.0781
1-3/32
1.0938
1-1/8
1.125
7
NC
0.9497
63/64
0.9844
1-1/32
1.0313
1-9/64
1.1406
1-5/32
1.1562
12
NF
1.0228
1-3/64
1.0469
1-5/64
1.0781
18
NEF
1.0568
1-1/16
1.0625
1-5/64
1.0781
1-3/16
1.1875
18
NEF
1.1193
49/64
1.125
1-9/64
1.1406
1-13/64
1.2031
1-7/32
1.2188
1-1/4
1.250
7
NC
1.0747
1-7/64
1.1094
1-5/32
1.1562
1-17/64
1.2656
1-9/32
1.2812
12
NF
1.1478
1-11/64
1.1719
1-13/64
1.2031
18
NEF
1.1818
1-3/16
1.1875
1-13/64
1.2031
1-5/16
1.3125
18
NEF
1.2443
1-1/4
1.25
1-17/64
1.2656
1-21/64
1.3281
1-11/32
1.3438
1-3/8
1.375
6
NC
1.1705
1-7/32
1.2187
1-17/64
1.2656
1-25/64
1.3906
1-13/32
1.4062
12
NF
1.2728
1-19/64
1.2969
1-21/64
1.3281
18
NEF
1.3068
1-5/16
1.3125
1-21/64
1.3281
1-7/16
1.4375
18
NEF
1.3693
1-3/8
1.375
1-25/64
1.3906
1-29/64
1.4531
1-15/32
1.4688
1-1/2
1.500
6
NC
1.2955
1-11/32
1.3437
1-25/64
1.3906
1-33/64
1.5156
1-17/32
1.5312
12
NF
1.3978
1-27/64
1.4219
1-7/16
1.4375
18
NEF
1.4318
1-7/16
1.4375
1-29/64
1.4531
1-9/16
1.5625
18
NEF
1.4943
1-1/2
1.5
1-33/64
1.5156
1-37/64
1.5781
1-19/32
1.5938
1-5/8
1.625
18
NEF
1.5568
1-9/16
1.5625
1-37/64
1.5781
1-41/64
1.6406
1-21/32
1.6562
1-11/16
1.6875
18
NEF
1.6193
1-5/8
1.625
1-41/64
1.6406
1-45/64
1.7031
1-23/32
1.7188
1-3/4
1.750
5
NC
1.5046
1-9/16
1.5625
1-5/8
1.625
1-49/64
1.7659
1-25/32
1.7812
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