ENGINEERING DATA
METRIC CONVERSIONS

METRIC SIZE X .03937 = DECIMAL EQUIVALENT
DECIMAL SIZE X 25.4 = METRIC (mm) EQUIVALENT
FRACTIONAL, DECIMAL AND METRIC EQUIVALENT
Fraction
Of Inch		 Decimal
Of Inch
Millimeters		 Fraction
Of Inch		 Decimal
Of Inch
Millimeters
1/64
1/32
3/64
1/16		  .015625
 .03125
 .046875
 .0625		  0.3969
 0.7938
 1.1906
 1.5875		 33/64
17/32
35/64
9/16		  .515625
 .53125
 .546875
 .5625		 13.0969
13.4938
13.8906
14.2875
5/64
3/32
7/64
1/8		  .078125
 .09375
 .109375
 .125		  1.9844
 2.3812
 2.7781
 3.1750		 37/64
19/32
39/64
5/8		  .578125
 .59375
 .609375
 .625		 14.6844
15.0812
15.4781
15.8750
9/64
5/32
11/64
3/16		  .140625
 .15625
 .171875
 .1875		  3.5719
 3.9688
 4.3656
 4.7625		 41/64
21/32
43/64
11/16		  .640625
 .65625
 .671875
 .6875		 16.2719
16.6688
17.0656
17.4625
13/64
7/32
15/64
1/4		  .203125
 .21875
 .234375
 .250		  5.1594
 5.5562
 5.9531
 6.3500		 45/64
23/32
47/64
3/4		  .703125
 .71875
 .734375
 .750		 17.8594
18.2562
18.6531
19.0500
17/64
9/32
19/64
5/16		  .265625
 .28125
 .296875
 .3125		  6.7469
 7.1438
 7.5406
 7.9375		 49/64
25/32
51/64
13/16		  .765625
 .78125
 .796875
 .8125		 19.4469
19.8438
20.2406
20.6375
21/64
11/32
23/64
3/8		  .328125
 .34375
 .359375
 .375		  8.3344
 8.7312
 9.1281
 9.5250		 53/64
27/32
55/64
7/8		  .828125
 .843750
 .859375
 .875		 21.0344
21.4312
21.8281
22.2250
25/64
13/32
27/64
7/16		  .390625
 .40625
 .421875
 .4375		  9.9219
 10.3188
 10.7156
 11.1125		 57/64
29/32
59/64
15/16		  .890625
 .90625
 .921875
 .9375		 22.6219
23.0188
23.4156
23.8125
29/64
15/32
31/64
1/2		  .453125
 .46875
 .484375
 .500		  11.5094
 11.9062
 12.3031
 12.7000		 61/64
31/32
63/64
1.000		  .953125
 .96875
 .984375
 1.000		 24.2094
24.6062
25.0031
25.4000

MILLIMETER PITCH TO THREADS PER INCH
METRIC PITCH CONVERSIONS
Pitch In
Millimeters		 Pitch In
Inches		 Threads
Per In.		 Basic
Height		 Pitch In
Millimeters		 Pitch In
Inches		 Threads
Per In.		 Basic
Height
.25
.30
.35
.40		 .00984
.01181
.01378
.01575		  101.6000
 84.6668
 72.5689
 63.4921		 .00639
.00767
.00895
.01023		  1.25
 1.50
 1.75
 2.00		 .04921
.05906
.06890
.07874		  20.3211
 16.9316
 14.5138
 12.7000		 .03196
.03836
.04475
.05114
.45
.50
.60
.70		 .01772
.01969
.02362
.02756		  56.4334
 50.8000
 42.3370
 36.2845		 .01151
.01279
.01534
.01790		 2.50
3.00
3.50
4.00		 .09843
.11811
.13780
.15748		  10.1595
 8.4667
 7.2569
 6.3500		 .06393
.07671
.08950
.10229
.75
.80
.90
1.00		 .02953
.03150
.03543
.03937		  33.8639
 31.7460
 28.2247
 25.4000		 .01918
.02046
.02301
.02557		 4.50
5.00
6.00
 		 .17717
.19685
.23622
 		  5.6443
 5.0800
 4.2333
 		 .11508
.12785
.15344