Electrical

Standard Resistors

E-24 (5%) E-48 (2%) E-96 (1%)
1.0 1.00 1.00 3.16
1.1 1.05 1.02 3.24
1.2 1.10 1.05 3.32
1.3 1.15 1.07 3.40
1.5 1.21 1.10 3.48
1.6 1.27 1.13 3.57
1.8 1.33 1.15 3.65
2.0 1.40 1.18 3.74
2.2 1.47 1.21 3.83
2.4 1.54 1.24 3.92
2.7 1.62 1.27 4.02
3.0 1.69 1.30 4.12
3.3 1.78 1.33 4.22
3.6 1.87 1.37 4.32
3.9 1.96 1.40 4.42
4.3 2.05 1.43 4.53
4.7 2.15 1.47 4.64
5.1 2.26 1.50 4.75
5.6 2.37 1.54 4.87
6.2 2.49 1.58 4.99
6.8 2.61 1.62 5.11
7.5 2.74 1.65 5.23
8.2 2.87 1.69 5.36
9.1 3.01 1.74 5.49

3.16 1.78 5.62

3.32 1.82 5.76

3.48 1.87 5.90

3.65 1.91 6.04

3.83 1.96 6.19

4.02 2.00 6.34

4.22 2.05 6.49

4.42 2.10 6.65

4.64 2.16 6.81

4.87 2.21 6.98

5.11 2.26 7.15

5.36 2.32 7.32

5.62 2.37 7.50

5.90 2.43 7.68

6.19 2.49 7.87

6.49 2.55 8.06

6.81 2.61 8.25

7.15 2.67 8.45

7.50 2.74 8.66

7.87 2.80 8.87

8.25 2.87 9.09

8.66 2.94 9.31

9.09 3.01 9.53

9.53 3.09 9.76
Digikey Resistors

Standard Capacitors

10pF 100pF 1000pF 0.010μF 0.10μF 1.0μF 10μF
12pF 120pF 1200pF 0.012μF 0.12μF 1.2μF
15pF 150pF 1500pF 0.015μF 0.15μF 1.5μF
18pF 180pF 1800pF 0.018μF 0.18μF 1.8μF
22pF 220pF 2200pF 0.022μF 0.22μF 2.2μF 22μF
27pF 270pF 2700pF 0.027μF 0.27μF 2.7μF
33pF 330pF 3300pF 0.033μF 0.33μF 3.3μF 33μF
39pF 390pF 3900pF 0.039μF 0.39μF 3.9μF
47pF 470pF 4700pF 0.047μF 0.47μF 4.7μF 47μF
56pF 560pF 5600pF 0.056μF 0.56μF 5.6μF
68pF 680pF 6800pF 0.068μF 0.68μF 6.8μF
82pF 820pF 8200pF 0.082μF 0.82μF 8.2μF
Digikey Capacitors

Wire Gauge Table

AWG mm2 Ohms per 1000 ft. Ohms per km Maximum amps Max freq
4/0 0.049 0.161 380 125 Hz
95 0.055 0.180 361 136 Hz
3/0 0.062 0.203 328 160 Hz
70 0.074 0.244 296 188 Hz
2/0 0.078 0.256 283 200 Hz
0 0.098 0.322 245 250 Hz
50 0.104 0.342 238 267 Hz
1 0.124 0.406 211 325 Hz
35 0.149 0.489 188 387 Hz
2 0.156 0.513 181 410 Hz
3 0.197 0.646 158 500 Hz
25 0.209 0.684 151 546 Hz
4 0.249 0.815 135 650 Hz
5 0.313 1.028 118 810 Hz
16 0.326 1.069 113 859 Hz
6 0.395 1.296 101 1100 Hz
7 0.498 1.634 89 1300 Hz
10 0.521 1.710 83 1380 Hz
8 0.628 2.060 73 1650 Hz
9 0.792 2.598 64 2050 Hz
6 0.869 2.850 60 2308 Hz
10 0.999 3.276 55 2600 Hz
4 1.303 4.275 46 3467 Hz
12 1.588 5.209 41 4150 Hz
2.5 2.085 6.840 34 5553 Hz
14 2.525 8.282 32 6700 Hz
1.5 3.475 11.40 24 9263 Hz
16 4.016 13.17 22 11 kHz
1 5.212 17.10 19 14 kHz
18 6.385 20.94 16 17 kHz
0.75 6.950 22.80 15 19 kHz
20 10.15 33.29 12 27 kHz
0.5 10.42 34.20 12 28 kHz
Resistance Calculator

Mechanical

Metric Tap Chart

Metric Tap Chart Tap Drill Clearance Drill
Aluminum, Brass, Plastics Steel, Stainless, Iron Close Fit Standard Fit
75% Thread 50% Thread
Screw Size Drill Size Closest Imperial Drill Size Closest Imperial Drill Size Closest Imperial Drill Size Closest Imperial
M1.5 x 0.35 1.15 #56 1.6 #55 1.6 1/16 1.65 #52
M1.6 x 0.35 1.25 #55 1.7 #54 1.8 #49 1.75 #50
M1.8 x 0.35 1.45 #53 1.9 1/16 1.9 #49 2.00 5/64
M2 x 0.45 1.55 1/16 1.7 #51 2.1 #45 2.20 #44
M2 x 0.40 1.60 #52 1.75 #50
M2.2 x 0.45 1.75 #50 1.9 #48 2.3 3/32 2.40 #41
M2.5 x 0.45 2.05 #46 2.65 #44 2.9 #32 2.75 7/64
M3 x 0.50 2.5 #39 2.7 #36 3.4 #29 3.30 #30
M3.5 x 0.60 2.90 #32 3.1 #31 3.9 #23 3.85 #24
M4 x 0.75 3.25 #30 3.5 #28 4.2 #19 4.40 #17
M4 x 0.70 3.3 #30 3.5 #28
M4.5 x 0.75 3.75 #25 4 #22 4.75 #13 5.00 #9
M5 x 1.00 4 #21 4.4 11/64 5.25 #5 5.50 7/32
M5 x 0.90 4.1 #20 4.4 #17
M5 x 0.80 4.2 #19 4.5 #16
M5.5 x 0.90 4.60 #14 4.9 #10 5.80 #1 6.10 B
M6 x 1.00 5 #8 5.4 #4 6.30 E 6.60 G
M6 x 0.75 5.25 #4 5.5 7/32
M7 x 1.00 6 B 6.4 E 7.40 L 7.70 N
M7 x 0.75 6.25 D 6.5 F
M8 x 1.25 6.8 H 7.2 J 8.40 Q 8.80 S
M8 x 1.00 7 J 7.4 L
M9 x 1.25 7.8 N 8.2 P 9.50 3/8 9.90 25/64
M9 x 1.00 8 O 8.4 21/64
M10 x 1.50 8.5 R 9 T 10.50 Z 11.00 7/16
M10 x 1.25 8.8 11/32 9.2 23/64
M10 x 1.00 9 T 9.4 U
M11 x 1.50 9.5 3/8 10 X 11.60 29/64 29/64 15/32
M12 x 1.75 10.2 13/32 10.9 27/64 12.60 1/2 13.20 33/64
M12 x 1.50 10.5 Z 1 7/16
M12 x 1.25 10.8 27/64 11.2 7/16
M14 x 2.00 12 15/32 12.7 1/2 14.75 37/64 15.50 39/64
M14 x 1.50 12.5 1/2 13 33/64
M14 x 1.25 12.8 1/2 13.2 33/64
M16 x 2.00 14 35/64 14.75 37/64 16.75 21/32 17.50 11/16
M16 x 1.50 14.5 37/64 15 19/32
M18 x 2.50 15.5 39/64 16.5 41/64 19 3/4 20.00 25/32
M18 x 2.00 16 5/8 16.75 21/32
M18 x 1.50 16.5 21/32 17 43/64
M20 x 2.50 17.5 11/16 18.5 23/32 21 53/64 22.00 55/64
M20 x 2.00 18 45/64 18.5 46/64
M20 x 1.50 18.5 47/64 19 3/4
M22 x 2.50 19.5 49/64 20 25/32 25 1 26.00 1-1/32
M22 x 1.50 20.5 13/16 20.75 13/16
M24 x 3.00 21 53/64 21.5 27/32 27 1-5/64 28.00 1-7/64
M24 x 2.00 22 7/8 22.25 7/8
M27 x 3.00 24 15/16 24.5 31/32 30 1-3/16 32.00 1-1/16
M27 x 2.00 25 1 25.25 1
McMaster Bolts

Sheetmetal Gauge Table


 Mild Steel Stainless Aluminum
Gauge in mm in mm in mm
7/0

0.5000 12.700

6/0

0.4686 11.902 0.5800 14.732
5/0

0.4375 11.113 0.5165 13.119
4/0

0.4063 10.320 0.4600 11.684
3/0

0.3750 9.525 0.4096 10.404
2/0

0.3438 8.733 0.3648 9.266
0

0.3125 7.938 0.3249 8.252
1

0.2813 7.145 0.2893 7.348
2

0.2656 6.746 0.2576 6.543
3 0.2391 6.073 0.2500 6.350 0.2294 5.827
4 0.2242 5.695 0.2344 5.954 0.2043 5.189
5 0.2092 5.314 0.2187 5.555 0.1819 4.620
6 0.1943 4.935 0.2031 5.159 0.1620 4.115
7 0.1793 4.554 0.1875 4.763 0.1443 3.665
8 0.1644 4.176 0.1719 4.366 0.1285 3.264
9 0.1495 3.797 0.1562 3.967 0.1144 2.906
10 0.1345 3.416 0.1406 3.571 0.1019 2.588
11 0.1196 3.038 0.1250 3.175 0.0907 2.304
12 0.1046 2.657 0.1094 2.779 0.0808 2.052
13 0.0897 2.278 0.0937 2.380 0.0720 1.829
14 0.0747 1.897 0.0781 1.984 0.0641 1.628
15 0.0673 1.709 0.0703 1.786 0.0571 1.450
16 0.0598 1.519 0.0625 1.588 0.0508 1.290
17 0.0538 1.367 0.0562 1.427 0.0453 1.151
18 0.0478 1.214 0.0500 1.270 0.0403 1.024
19 0.0418 1.062 0.0437 1.110 0.0359 0.912
20 0.0359 0.912 0.0375 0.953 0.0320 0.813
21 0.0329 0.836 0.0344 0.874 0.0285 0.724
22 0.0299 0.759 0.0312 0.792 0.0253 0.643
23 0.0269 0.683 0.0281 0.714 0.0226 0.574
24 0.0239 0.607 0.0250 0.635 0.0201 0.511
25 0.0209 0.531 0.0219 0.556 0.0179 0.455
26 0.0179 0.455 0.0187 0.475 0.0159 0.404
27 0.0164 0.417 0.0172 0.437 0.0142 0.361
28 0.0149 0.378 0.0156 0.396 0.0126 0.320
29 0.0135 0.343 0.0141 0.358 0.0113 0.287
30 0.0120 0.305 0.0125 0.318 0.0100 0.254
31 0.0105 0.267 0.0109 0.277 0.0089 0.226
32 0.0097 0.246 0.0102 0.259 0.0080 0.203
33 0.0090 0.229 0.0094 0.239 0.0071 0.180
34 0.0082 0.208 0.0086 0.218 0.0063 0.160
35 0.0075 0.191 0.0078 0.198 0.0056 0.142
36 0.0067 0.170 0.0070 0.178 0.0050 0.127
37 0.0064 0.163 0.0066 0.168 0.0045 0.114
38 0.0060 0.152 0.0062 0.157 0.0040 0.102
39



0.0035 0.089
40



0.0031 0.079

Materials

Metals

UNS # Common Name Notes
Aluminum
A96061 6061
  • High strength
  • Good machinability
A96063 6063
  • Good surface finish
  • Good extrudability
Copper
C11000 Electrolytic Tough Pitch
C36000 Beryllium Copper
C51000 Phosphor Bronze
C77000 Nickel Silver
Carbon Steel
G10750 1075
Stainless Steel
S30400 304
  • Good corrosion resistance
  • Lower Cost
S31600 316
  • Superior corrosion resistance
  • High strength
Tool Steel
T30102 A2

Plastics

UNS # Common Name Notes
Nylon
ABS
Alro Materials

Tolerances

Machining Capabilities

Operation International Tolerance Grades
4 5 6 7 8 9 10 11
Lapping & Honing







Cylindrical Grinding







Surface Grinding







Diamond Turning







Diamond Boring







Broaching







Powder Metal Sized







Reaming







Turning







Powder Metal Sintered







Boring







Milling







Planing & Shaping







Drilling







Punching







Die Casting







Practical Use of IT Grades

Use Grades
Measuring Tools 01 - 7
Fits 5 - 11
Material 8 - 14
Large Tolerances 12 - 16

Preferred Fits

Shaft Basis Hole Basis Description/Application
Clearance Fits
C11/h11 H11/c11 Loose Running Fit- Wide commercial tolerances, used where accuracy is not essential
D9/h9 H9/e9 Free Running Fit- High running speeds, large temperature variations, heavy pressures and wehre accuracy is not essential
F8/h7 H8/f7 Close Running Fit- Accurate location at moderate speeds on accurate machines
G7/h6 H7/g6 Sliding Fit- Accurate location where components are intended to move and turn freely but not run freely
H7/h6 H7/h6 Locational Clearance Fit- Snug fit for locating stationary components which need to be freely assembled and disassembled
Transition Fits
K7/h6 H7/k6 Locational Transition Fit (Tap Fit)- Accurate location where assembly requires gentle persuasion
N7/h6 H7/n6 Locational Transition Fit- More accurate location where assembly permits greater interference
Interference Fits
P7/h6 H7/p6 Locational Interference- Prime accuracy of location where assembly requires alignment and rigidity
S7/h6 H7/s6 Medium Drive Fit (Press Fit)- For assembly of steel parts and shrink fits on light sections
U7/h6 H7/u6 Force Fit (Press Fit)- For assembly of components where high pressures and stresses are permitted
source

Nominal Diameter
Tolerance (3,6] (6,10] (10,18] (18,30] (30,50] (50,80] (80,120]
S
H
A
F
T
S		 e6 -20
-28		 -25
-34		 -32
-43		 -40
-53		 -50
-66		 -60
-79		 -72
-94
f7 -10
-22		 -13
-28		 -16
-34		 -20
-41		 -25
-50		 -30
-60		 -36
-71
g6 -4
-12		 -5
-14		 -6
-17		 -7
-20		 -9
-25		 -10
-29		 -12
-34
h6 0
-8		 0
-9		 0
-11		 0
-13		 0
-16		 0
-19		 0
-22
h7 0
-12		 0
-15		 0
-18		 0
-21		 0
-25		 0
-30		 0
-35
h9 0
-30		 0
-36		 0
-43		 0
-52		 0
-62		 0
-74		 0
-87
h11 0
-75		 0
-90		 0
-110		 0
-130		 0
-160		 0
-190		 0
-220
k6 +9
+1		 +10
+1		 +12
+1		 +15
+2		 +18
+2		 +21
+2		 +25
+3
n6 +16
+8		 +19
+10		 +23
+12		 +28
+15		 +33
+17		 +39
+20		 +45
+23
p6 +20
+12		 +24
+15		 +29
+18		 +35
+22		 +42
+26		 +51
+32		 +59
+37
H
O
L
E
S		 F8 +28
+10		 +35
+13		 +43
+16 		+53
+20		 +64
+25		 +76
+ 30		 +90
+36
G7 +16
+4		 +20
+5		 +24
+6 		+28
+7		 +34
+9		 +40
+10		 +47
+ 12
H7 +12
0		 +15
0		 +18
0 		+21
0 		+25
0		 +30
0		 +35
0
H8 +18
0		 +22
0		 +27
0 		+33
0 		+39
0		 +46
0		 +54
0
H9 +30
0		 +36
0		 +43
0 		+52
0 		+62
0		 +74
0		 +87
0
H11 +75
0		 +90
0		 +110
0 		+130
0 		+160
0		 +190
0		 +220
0

Wrench/Socket Sizes

SAE Metric
1/32 0.79375
1
1/16 1.5875
2
3/32 2.38125
3
1/8 3.175
5/32 3.96875
4
3/16 4.7625
5
7/32 5.55625
6
1/4 6.35
7
9/32 7.14375
5/16 7.9375
8
11/32 8.73125
9
3/8 9.525
10
13/32 10.31875
11
7/16 11.1125
15/32 11.90625
12
1/2 12.7
13
17/32 13.49375
14
9/16 14.2875
15
19/32 15.08125
5/8 15.875
16
21/32 16.66875
17
11/16 17.4625
18
23/32 18.25625
19
3/4 19.05
25/32 19.84375
20
13/16 20.6375
21
27/32 21.43125
22
7/8 22.225
23
29/32 23.01875
15/16 23.8125
24
31/32 24.60625
25
1 25.4

Software

ASCII Table

Dec Hex Char Dec Hex Char Dec Hex Char Dec Hex Char
0 0 NUL 32 20 Space 64 40 @ 96 60 `
1 1 SOH 33 21 ! 65 41 A 97 61 a
2 2 STX 34 22 " 66 42 B 98 62 b
3 3 ETX 35 23 # 67 43 C 99 63 c
4 4 EOT 36 24 $ 68 44 D 100 64 d
5 5 ENQ 37 25 % 69 45 E 101 65 e
6 6 ACK 38 26 & 70 46 F 102 66 f
7 7 BEL 39 27 ' 71 47 G 103 67 g
8 8 BS 40 28 ( 72 48 H 104 68 h
9 9 TAB 41 29 ) 73 49 I 105 69 i
10 A LF 42 2A * 74 4A J 106 6A j
11 B VT 43 2B + 75 4B K 107 6B k
12 C FF 44 2C , 76 4C L 108 6C l
13 D CR 45 2D - 77 4D M 109 6D m
14 E SO 46 2E . 78 4E N 110 6E n
15 F SI 47 2F / 79 4F O 111 6F o
16 10 DLE 48 30 0 80 50 P 112 70 p
17 11 DC1 49 31 1 81 51 Q 113 71 q
18 12 DC2 50 32 2 82 52 R 114 72 r
19 13 DC3 51 33 3 83 53 S 115 73 s
20 14 DC4 52 34 4 84 54 T 116 74 t
21 15 NAK 53 35 5 85 55 U 117 75 u
22 16 SYN 54 36 6 86 56 V 118 76 v
23 17 ETB 55 37 7 87 57 W 119 77 w
24 18 CAN 56 38 8 88 58 X 120 78 x
25 19 EM 57 39 9 89 59 Y 121 79 y
26 1A SUB 58 3A : 90 5A Z 122 7A z
27 1B ESC 59 3B ; 91 5B [ 123 7B {
28 1C FS 60 3C < 92 5C \ 124 7C |
29 1D GS 61 3D = 93 5D ] 125 7D }
30 1E RS 62 3E > 94 5E ^ 126 7E ~
31 1F US 63 3F ? 95 5F _ 127 7F DEL

Regex

Character classes
. any character except newline
\w \d \s word, digit, whitespace
\W \D \S not word, digit, whitespace
[abc] any of a, b, or c
[^abc] not a, b, or c
[a-g] character from a to g
Anchors
^abc$ start / end of the string
\b \B word, not-word boundary
Escaped Characters
\. \* \\ escaped special characters
\t \n \r tab, linefeed, carriage return
\x1B \u001B Character hex representation
Groups & Lookaround
(abc) capture group
\1 backreference to group #1
(?:abc) non-capturing group
(?=abc) positive lookahead
(?!abc) negative lookahead
Quantifiers & Alternation
a* a+ a? 0 or more, 1 or more, 0 or 1
a{5} a{2,} exactly five, two or more
a{1,3} between one & three
a+? a{2,}? match as few as possible
ab|cd match ab or cd
RegExr