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Catalog 3501E General Technical Thread Specifications Dryseal Pipe Threads All dryseal pipe threads are manufactured in accordance with the American National Standards Institute (ANSI) B1.20.3 specification and designed to seal pressure tight joints. The threads may incorporate the NPTF (National Standard Pipe Taper Fuel and Oil), PTF-SAE Short, PTF-SPL Short or PTF-SPL Extra Short form. Dryseal threads are used on brass products found within this catalog. Use of a thread sealant is recommended. Dryseal Pipe Thread Non-Dryseal PipeThreads Metal to metal contact.Crests of thread are crushed by the All non-dryseal pipe threads are manufactured in accordance with the roots when wrench-tightened to form seal. American National Standards Institute (ANSI) B1.20.1 specification. These tapered pipe threads are used on our carbon and stainless steel products. Use of a thread sealant is recommended. Nickel Plating Nickel plating is available for all standard product fittings. Plating will increase male pitch diameters and decrease female pitch diameters of threads.This will affect the assembly characteristics on standard products. Nickel plating provides a corrosion resistant coating which is desirable Non-Dryseal PipeThread in many applications. Electrolytic nickel plating is the standard plating Flanks are in contact with possible clearance between the supplied unless otherwise specified.This will provide a uniform roots and crests.Will not prevent spiral leakage coverage of external surfaces; however, internal surfaces may be uncoated. Unified Threads All threads in the columns headed "Straight Thread" found within this catalog are manufactured in accordance with the American National Standards Institute (ANSI) B1.1 specification. British Standard Pipe Threads BSPT and BSPP Pressure Tight The British pipe threaded products found within this catalog intended for use where pressure tight joints are made on the threads are manufactured in accordance with British Standard (BS) 21 and International Standards Organization (ISO) 7-1. The threads are designated as follows: BS21 British Standard Pipe Thread for Rp: Internal parallel Pressure Tight Joints Rc: Internal taper Metal to metal contact provides seal as tapered thread is Rs: Special external parallel wrench-tightened. R: External taper Use of a thread sealant is recommended with the R series thread. An elastomeric peripheral seal should be used with the Rs thread. Non-Pressure Tight All British Standard parallel pipe threads manufactured in this catalog according to BS2779 and ISO 228-1 are intended for use where pressure tight joints are not made on the threads. An elastomeric M peripheral seal should be used. These threads are designated as follows: BS2779 British Standard Pipe Thread for Non-Pressure Tight Joints G: Internal Thread Thread tolerances allow for possible clearance between GA, External thread, tight tolerance classification threads.Will not prevent leakage paths. GB, External thread, general purpose and assumed if no classification designation is given M5 Parker Hannifin Corporation Parker Brass Products Division Otsego, Michigan
Goodyear Rubber Products
