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2. Schrader valve - Wikipedia

   en.wikipedia.org/wiki/Schrader_valve

   Schrader valves are also viewed as more complex (requiring two seals over one). They weigh 4 to 5 grams (0.14 to 0.18 oz) more than Presta valves. [8] Schrader and Dunlop valve stems are 8 mm in diameter, whereas Presta valve stems are 6 mm, allowing Prestas to be used on narrower, high-performance rims as on road racing bicycles. Another ...

3. Valve stem - Wikipedia

   en.wikipedia.org/wiki/Valve_stem

   Presta valves (also called Sclaverand valves or French valves) are normally only used on bicycles. The stem has a narrower diameter (nominally 6 mm) than the thinnest (nominally 8 mm) Schrader type, and so the bore of the hole in the rim through which the stem passes can be smaller. Has a locknut that needs to be opened to inflate/deflate. [17 ...

4. List of drill and tap sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_drill_and_tap_sizes

   Such an appropriately sized drill is called a tap drill for that size of thread, because it is a correct drill to be followed by the tap. Many thread sizes have several possible tap drills, because they yield threads of varying thread depth between 50% and 100%. Usually thread depths of 60% to 75% are desired.

5. National pipe thread - Wikipedia

   en.wikipedia.org/wiki/National_pipe_thread

   American Society of Mechanical Engineers National Pipe Thread Taper (NPT) [5] Nominal pipe size Thread density Thread pitch P Hand-tight engagement [6] Effective thread [6] Overall length L 4 [6] Actual outside diameter D Tap drill; Length L 1 Turns Diameter E 1 Length L 2 Turns Diameter E 2; inch inch −1 inch mm inch inch inch inch inch inch ...

6. List of valves - Wikipedia

   en.wikipedia.org/wiki/List_of_valves

   Saddle valve: where allowed, is used to tap a pipe for a low-flow need; Schrader valve: holds the air inside automobile tires; Security valve, a type of automatic shut-off valve (ASV): used to stop the flow of natural gas upon sudden pressure changes. Increased pressure or decreased pressure closes the valve (without using any external power ...

7. Propane, butane, and LPG container valve connections

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

   1" No thread Quick coupling 24.5 mm (G.55) EN 15202 24.5 mm 1" No thread Quick coupling 24.5 mm (G.60) EN 15202 25.4 mm 1" No thread Quick coupling 27 mm (G.59) EN 15202 27 mm 1.063" No thread Quick coupling 35 mm Jumbo (G.56) EN 15202 35 mm 1.378" No thread Quick coupling bayonet (G.61) EN 15202 No thread Quick Coupling Fork Lift (G.66)