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美标UNJ系列航空螺纹
美标UNJ系列航空螺纹
美标MJ系列航空螺纹
进口航空螺纹量规
美国进口螺纹规
GSG航空螺纹规
产地:美国
货期:6-8周
Thread Gages, thread plug gages and screw thread ring gages Un, UNJ right handed thread gages, left handed thread gages, metric threads, NPT, NPTF, NPSM, NPSF, Acme Thread Gages, Buttress thread gages, pin sets, Go thread rings, Go thread plugs, No Go thread plugs, Go No Go thread rings masters and gaging
UNJ-Series Thread Gages. J-Series Taperlock Plug Gages (UNJC, UNJF, UNJEF, MJ) J-Series Thread Ring Gages         (UNJC, UNJF, UNJEF, MJ) Sets = Go/NoGo w/Handle. Next ». Pages: 1; 2. #4-40 UNJC Class 3B. Quick View. #4-40 UNJC Class 3B Taperlock Thread Plug Gage Set. $86.70. Compare. 
(As defined by MIL-S-8879C). - UNJ internal threads do not require radius; only external thread requires radius on root. - UNJ external thread assembles only with UNJ internal thread. - UNJ tap is standard 2B or 3B class of fit. UNJ Graphic. See North American Tool 2017 Special Taps, Dies & Gages catalog 

       UNJ, UNJC, UNJF and UNJEF threads are almost identical to UN, UNC, UNF, and UNEF threads except that the external J thread has a much larger root radius than the standard UN threads and inspection must be performed on this element. The Special UNJ threads are designated by the nomenclature UNJS. J screw threads feature a root radius which improves the tensile stress area of the fastener and helps to reduce the stress concentration factor in the thread thus making the thread stronger. Additionally, the requirement for high strength is achieved with 3A and 3B classes of fit. All pitch diameters and tolerances are based on the Unified Inch Standard.

MIL-S-8879, UNJ Screw Thread Producers and Users. 1. CANCELLATION NOTICE: Effective 24 February 2003 with Notice 3. MIL-S-8879C, dated 25 July 1991, and AMENDMENT 1, dated 2 September 1992, are Hereby cancelled, and superceded by the Society of Automotive Engineers (SAE) Aerospace

      SAE AS8879 was introduced to provide an alternative to the inactive government specification Mil-S-8879 for screw threads – UNJ profile, inches.

     Per SAE AS8879, UNJ Thread profiles are not interchangeable with Metric system MJ profiles or UN profile inch screws. The internal UNJ thread will assemble with the standard UN external thread however assembling external UNJ threads with UN series internal threads should be avoided due to potential interference at the minor diameter.

     External threads are of Unified form per ASME B1.1 and modified at the root so that the flanks of the adjacent threads are joined by one continuous, smooth and blended curve tangent to the flanks. The radius is specified in the applicable standard.

     Internal threads are also of Unified form per ASME B.1. and modified at the minor diameter to the values specified in the applicable standard.

    Standard working Go/No Go thread plug gages are used to inspect internal J threads. The gage is typically marked without any modifications to the Plugs.

   For external J threads, the Go member is modified to clear the minor diameter. A standard No Go thread ring gage may be used to inspect J threads. Both gages are typically marked accordingly.

    苏州斯托茨机电设备有限公司可以提供全系列GSG航空螺纹量规,货期短,质量稳定可靠,期待您的咨询。

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