Bsp thread chart pdf

There are two types of BSP Thread available. One is Parallel threads or we can say Straight threads and second one is Taper Thread. Female and Male thread are both parallel. BSPP thread used where a pressure-tight joint is achieved by the compression of a soft material such as an o-ring seal or a washer between the end face of the male thread and a socket or nipple face, with the tightening of a backnut.

BSPT thread used where pressure-tightness is made through the mating of two threads together. In International standards require all Female thread is parallel and male thread is tapered.

Female thread can also be tapered but this is not common. TPI is used only with American fasteners. Metric Fasteners use a thread Pitch. In general, smaller fasteners have finer threads, so the thread count is higher.

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Metric fasteners are specified with a thread pitch instead of a thread count. The thread pitch is the distance between threads expressed in millimeters.

In general, smaller fasteners have finer thread so they have lower thread pitch. Thread Pitch Metric fasteners are specified with a thread pitch instead of a thread count. Brass Components. Brass Auto Parts. Brass Inserts. Brass Fasteners. Types Of Hinges. Brass Pipe Fittings. Brass Sanitary Fittings. Brass Hose Connector. Brass Camera Parts. Brass 3d Printer Parts.

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Brass Valves.The Whitworth thread was the world's first national screw thread standard devised and specified by Joseph Whitworth in Until then, the only standardization was what little had been done by individual people and companies, with some companies' in-house standards spreading a bit within their industries. The thread pitch increases with diameter in steps specified on a chart.

These are the first instance of mass-production techniques being applied to marine engineering, as the following quotation from the obituary from The Times of 24 January to Sir Joseph Whitworth — shows. This is more like the modern "mechanical" screw and was used for fine machinery and for steel bolts. TPI is used only with American fasteners. Metric Fasteners use a thread Pitch. In general, smaller fasteners have finer threads, so the thread count is higher.

Metric fasteners are specified with a thread pitch instead of a thread count. The thread pitch is the distance between threads expressed in millimeters. In general, smaller fasteners have finer thread so they have lower thread pitch.

bsp thread chart pdf

These are the first instance of mass-production techniques being applied to marine engineering, as the following quotation from the obituary from The Times of 24 January to Sir Joseph Whitworth — shows The British Standard Fine BSF standard has the same thread angle as the BSW, but has a finer thread pitch and smaller thread depth. Thread Pitch Metric fasteners are specified with a thread pitch instead of a thread count. Brass Components. Brass Auto Parts.

Brass Inserts. Brass Fasteners. Types Of Hinges. Brass Pipe Fittings. Brass Sanitary Fittings. Brass Hose Connector. Brass Camera Parts. Brass 3d Printer Parts. Brass Valves.Looking for a particular Fitting or Accessory? Click here to try our Product Finder. I have found that my Japanese-built injection mold presses have predominantly BSP fittings.

While the actual specified outside diameters of American National Pipe differ slightly from those of British Standard Pipe, either thread may reliably be cut onto a pipe of its respective trade size. To determine pitch, use a thread gauge or count the number of threads that fall into a 1" span.

Metric threads are usually specified in actual pitch, e. This is the actual length of each thread, peak to peak.

Disclaimer: Links to sources of products are offered with no review or qualification of said products on the part of PipeandHose. Disclosure: Some product links are affiliate links, meaning, at no additional cost to you, we will earn a commission if you click through and make a purchase. Site Theme by Zymphonies. BSP Pipe. Fitting Type:. Iron PipePlastic Pipe. Field of Application:.

bsp thread chart pdf

AutomotiveHydraulicsMarinePlumbing. Pipe Size.The thread form follows the British Standard Whitworth thread. The taper is 1 to 16, measured on the diameter. Gauge diameter: Major diameter of the external or internal thread at gauge plane. Gauge plane: Plane, perpendicular to the axis of the taper thread, at which the major cone has the gauge diameter.

Gauge length: The distance from the gauge plane to the smaller end of the thread on an external thread. Major cone: The imaginary cone which just touches all crests of a taper external thread or all roots of a taper internal thread. Washout thread; Vanish thread: The thread which is not fully formed at the root. Fitting Allowance: The external thread beyond the gauge plane which is required to provide an assembly with an internal thread at the upper limit of tolerance.

It includes the wrenching allowance. Wrenching Allowance: Useful thread length which is provided to accommodate for wrenching beyond the position of handtight engagement. Pipe Thread Size. Threads per inch Pitch of Thread. Height of Thread. Diameters at gauge plane. Major gauge diameter.

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Gauge length external thread. Tolerance in mm. Tolerance in turns of thread. Tolerance on position of gauge plane on internal thread. For nominal gauge length. For maximum gauge length.

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For minimum gauge length. Fitting allowance. Diameter tolerance on parallel internal threads.Threads according BSi - British Standard Institute - BS 21 "Specification for pipe threads for tubes and fittings where pressure-tight joints are made on the threads" can be made as. Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro.

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NPT vs. BSP Pipe

Citation This page can be cited as Engineering ToolBox, Modify access date. Scientific Online Calculator. Make Shortcut to Home Screen?JavaScript seems to be disabled in your browser. For the best experience on our site, be sure to turn on Javascript in your browser. British Pipe Standard fittings are among the most popular of all foreign threads. Although BSP is a foreign thread, it isn't metric.

You must find the I. Simply obtain a caliper reading from inside the bore of the fitting. You can cross-reference the bore size on the following chart with thread pitch and threads per inch to find your desired size and its related specs. Be the first to hear about new products and promotions:. Home British Standard Pipe. Very good communication. May Only place on the net to get hard to find fittings. Mar Works great.

Fast shipping. Jan As advertised! Sep Store price double of this. Highly recommended. Aug Good dealer. Couldn't find the grease fittings anywhere else. Jul Finally found them. Working great! Dec Thanks a lot! Jun No complaints. Great seller to do business with.

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Nov Oct Looks great.Pipe Threads. These metric pipe thread sizes have been adopted by the ISO International Standards Organizationand are primarily intended for pipes or tubes for screwing together or into ISO pipe ports on valves, cylinders, pumps, and other components. An appropriate thread sealant can be used, if necessary, to ensure pressure-tight joints. However, except on very small ports, straight threads with O-ring seal may be preferred to pipe threads as component ports.

Straight thread ports are shown on the back side of this sheet. ISO metric machine threads should be used instead of pipe threads for mechanical fastenings such as bolts and nuts. Pitch the distance between threads is expressed as the number of threads per As with NPT threads, the nominal size does not represent true outside pipe diameter but in the larger sizes it comes very close. Usually a thread sealant is required.

There are two variations of ISO pipe threads.

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Parallel threads also called straight threads and taper threads. Taper threads have a taper and the same reamers can be used as for NPT threads. Reamers are not strictly necessary but in the larger sizes they enable a better thread to be produced. ISO pipe threads, when specified, are assumed to be parallel unless a taper thread is called out. Taper threads seal on the threads themselves.

Parallel threads, if a leaktight fluid seal is required, seal with a gasket, washer, or O-ring against the female seat. Since there is only one thread pitch, the thread pitch is usually not specified and they are called out only by nominal size as noted below. These specifications give information on thread form, machining dimensions, and tolerances.

Information on inspection and gauging is in Part 2 of the same specifications. However, parallel external threads do not make a tight fluid seal on the threads and should not be used for jointing. They should not be mated with internal pipe threads except where a leaktight joint is not required. If a fluid-tight seal is required a sealing element washer or gasket must be used.

The correct way of calling them out is:. Port Threads. The ISO International Standards Organization has adopted these straight thread sizes for fluid ports on pumps, valves, cylinders, and other components. They seal with a metric O-ring.

SNNC 275 P2 BSP & Whit-worth Threads

They will also be used on tube and hose fittings and on port adaptors. Specifications such as port machining dimensions, finishes, and tolerances are shown in ISO Specification E. In the ISO metric system a decimal point is made with a comma instead of a period. Threads are called out by O. Pitch is the distance between adjacent thread crests. Since there is only one pitch, port threads may be called out by diameter alone, as M12, etc.

bsp thread chart pdf

ISO pipe threads, either parallel or tapered, can also be used as component port threads. See chart on front side of this sheet.

bsp thread chart pdf

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