logo

NOMINAL NPT PIPE SIZE to
NOMINAL METRIC SIZE
CONVERSION CHART
NOMINAL PIPE SIZE
(INCHES/U.S.)
NOMINAL PIPE SIZE
(METRIC)
1/8" 6 mm
3/16" 7 mm
1/4" 8 mm
3/8" 10 mm
1/2" 15 mm
5/8" 18 mm
3/4" 20 mm
1" 25 mm
1-1/4" 32 mm
1-1/2" 40 mm
2" 50 mm
2-1/2" 65 mm
3" 80 mm
3-1/2" 90 mm
4" 100 mm
4-1/2" 115 mm
5" 125 mm
6" 150 mm

THINK!- MARYLAND METRICS - The One-Stop Source for Metric & British
Sized Fasteners, Wrenches, Cutting, & Measuring Tools, Metal Shapes,
Oil Seals, O-Rings, Mechanical Power Transmission Equipment, Bearings,
Hydraulic And Pneumatic Fittings & Tubing, Workholding Components,
Plumbing Fittings, & Some Electrical & Electronic Components.
Click to go to Maryland Metrics home page


Phones: (800) 638-1830 or (410) 358-3130 are available Monday-Friday 8:30 AM to 5:30 PM Eastern time.
Faxes: (800) 872-9329 or (410) 358-3142 & E-mail are available anytime.
Warehouse & showroom hours are Monday-Friday 10 AM to 5:30 PM.
[ To: Maryland Metrics home page ] [ To: Maryland Metrics Product Guide ] [ e-mail to Maryland Metrics ]
Please note that all Trademarks and Tradenames are the property of their respective owners.
copyright 2001, 2011 maryland metrics -- all rights reserved -- ver ff07f metnptcomp.htm
[Enhanced for Netscape/IE]