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  2. Nominal Pipe Size - Wikipedia

    en.wikipedia.org/wiki/Nominal_Pipe_Size

    Nominal Pipe Size (NPS) is a North American set of standard sizes for pipes used for high or low pressures and temperatures. [1] " Nominal" refers to pipe in non-specific terms and identifies the diameter of the hole with a non-dimensional number (for example – 2-inch nominal steel pipe" consists of many varieties of steel pipe with the only criterion being a 2.375-inch (60.3 mm) outside ...

  3. French catheter scale - Wikipedia

    en.wikipedia.org/wiki/French_catheter_scale

    The French scale measures and is proportional to the outer diameter of a catheter, with 1 French (Fr) defined as 13 millimeter, making the relationship: 1 mm = 3 Fr. Thus, the outer diameter of a catheter in millimeters can be calculated by dividing the French size by 3. [ 2 ]

  4. Preferred metric sizes - Wikipedia

    en.wikipedia.org/wiki/Preferred_metric_sizes

    The ISO 2848 basic module is a unit of 100 mm, often represented by a single capital "M", along with 300 mm and 600 mm groupings, that is widely used for the widths of furniture in Europe. A standard metric (concrete) block is 190 mm wide, 390 mm long, and 190 mm high, which allows for 10 mm mortar joints in between bricks, giving a standard ...

  5. EIA RF Connectors - Wikipedia

    en.wikipedia.org/wiki/EIA_RF_Connectors

    They are commonly referred to by the inner diameter of the outer conductor in fractional inches. Sizes covered under these two standards range from 3/8 to 6 1/8 inch outside diameter (OD) for 50 Ω and 3/8 to 3 1/8 inch OD for 75 Ω.

  6. Metric drill bit sizes - Wikipedia

    en.wikipedia.org/wiki/Drill_bit_sizes

    So a 1 / 2 in (12.7 mm) diameter drill will be able to drill a hole 4 + 1 / 2 in (114.3 mm) deep, since it is 9 times the diameter in length. A 1 / 8 in (3.175 mm) diameter drill can drill a hole 1 + 5 / 8 in (41.275 mm) deep, since it is 13 times the diameter in flute length. [3]

  7. ISO/IEC 7810 - Wikipedia

    en.wikipedia.org/wiki/ISO/IEC_7810

    The ID-1 format specifies a size of 85.60 by 53.98 millimetres (3 + 38 in × 2 + 18 in) and rounded corners with a radius of 2.88–3.48 mm (about 18 in). This format is also referred to as CR-80 and, for travel documents, TD1. It is commonly used for payment cards (ATM cards, credit cards, debit cards, etc.).

  8. Propane, butane, and LPG container valve connections

    en.wikipedia.org/wiki/Propane,_butane,_and_LPG...

    1.337 mm 3/8" 19 TPI DIN 477-1 No. 4 DIN 477-1 No. 4 BSP: 16.7 mm 1.337 mm 3/8" 19 TPI Dish Autogas Dish No thread INT Euro Nozzle Autogas Euro No thread EXT

  9. List of metric units - Wikipedia

    en.wikipedia.org/wiki/List_of_metric_units

    The lambda (λ) is a unit of volume equal to one cubic millimetre (1 mm 3). The litre (symbol l or L) is a unit of volume equal to one cubic decimetre (1 dm 3). The stere (st) is a unit of volume equal to 1 m 3.