Parker Hannifin Corporation
Fluid System Connectors
Otsego, Michigan
N21
Catalog 3501E
General Technical
English/Metric Conversions
mm
inch
Fraction Decimal
19.4469
49/64
.7656
19.8438
25/32
.7812
20.2406
51/64
.7968
20.2375
13/16
.8125
21.0344
53/64
.8281
21.4312
27/32
.8437
21.8281
55/64
.8593
22.2250
7/8
.8750
22.6219
57/64
.8906
23.0188
29/32
.9062
23.4156
59/64
.9218
23.8125
15/16
.9375
24.2094
61/64
.9531
24.6062
31/32
.9687
25.0031
63/64
.9843
25.4000
1
1.0000
mm
inch
Fraction Decimal
13.0969
33/64
.5156
13.4938
17/32
.5312
13.8906
35/61
.5468
14.2875
9/16
.5625
14.6844
37/64
.5781
15.0812
19/32
.5937
14.4781
39/64
.6093
15.8750
5/8
.6250
16.2719
41/64
.6406
16.6688
21/32
.6562
17.0656
43/64
.6718
17.4625
11/16
.6875
17.8594
45/64
.7031
18.2562
23/32
.7187
18.6531
47/64
.7343
19.0500
3/4
.7500
mm
inches
Fraction Decimal
6.7469
17/64
.2656
7.1438
9/32
.2812
7.5406
19/64
.2968
7.9375
5/16
.3125
8.3344
21/64
.3281
8.7312
11/32
.3437
9.1281
23/64
.3593
9.5250
3/8
.3750
9.9219
25/64
.3906
10.3188
13/32
.4062
10.7156
27/64
.4218
11.1125
7/16
.4375
11.5094
29/64
.4531
11.9062
15/32
.4687
12.3031
31/64
.4843
12.7000
1/2
.5000
mm
inches
Fraction Decimal
.3969
1/64
.0156
.7938
1/32
.0312
1.1906
3/64
.0468
1.5875
1/16
.0625
1.9844
5/64
.0781
2.3812
3/32
.0937
2.7781
7/64
.1093
3.1750
1/8
.1250
3.5719
9/64
.1406
3.9688
5/32
.1562
4.3656
11/64
.1718
4.7625
3/16
.1875
5.1594
13/64
.2031
5.5562
7/32
.2187
5.9531
15/64
.2343
6.3500
1/4
.2500
Inches x 25.4 = Millimeters (mm)
Inches x 2.54 = Centimeters (cm)
Inches x .254 = Decimeters (dm)
Feet x .3048 = Meters (m)
Yards x .9144 = Meters (m)
Psi x .0689 = Bars (Bar)
Bars x 100 = Kilopascals (kPa)
Psi x .0069 = Megapascals (MPa)
Pound Inches x .113 = Newton Meters (N•m)
Pound Feet x 1.356 = Newton Meters (N•m)
Millimeters x .0394 = Inches
Centimeters x .3937 = Inches
Meters x 3.281 = Feet
Meters x 1.0936 =Yards
Bars x 14.5 = Psi
Megapascals x 145 = Psi
Newton Meters x 8.85 = Pound Inches
Newton Meters x .737 = Pound Feet
Millimeters to Fractions to Decimals