UNF threads, with their fine pitch, are ideal for applications requiring high strength and tight tolerances, while UNJF threads, designed for high-precision industries like aerospace, are tailored for more specialized, high-stress environments.

Unified National Fine (UNF) threads are a specific type of screw thread defined by the Unified Thread Standard (UTS). These threads are designed with a finer pitch compared to their coarse counterparts, offering enhanced grip and tensile strength. This design is particularly advantageous in applications where precision and durability are paramount.

UNJF Thread Series, is suitable for the production of bolts, screws, and nuts for aerospace applications where the Root Radius is controlled. External threads of this series have greater tensile stress area than comparable sizes of the Coarse series. The Fine series is suitable when the resistance to stripping of both external. . . .

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2022年9月29日 · The neat polyester (NP), untreated jute fiber (UTJF)/polyester composites, and sodium bicarbonate-treated jute fiber (SBTJF)/polyester composites were subjected to the above-mentioned mechanical testings. The test results indicate that incorporating jute fiber into a polyester matrix improves the mechanical properties.

2024年2月26日 · UNJF is an American fine aerospace thread. It belongs to the J-series of American thread standards as described in ASME B1.15. The UNJF thread has a flank angle of 60°. The UNJF thread table shows selected thread …

UNJF：美制航空航天螺纹（细牙),为提高疲劳强度，外螺纹牙底采用了较大半径的牙底圆弧（J的含义）。 牙底为连续、光滑的曲线，曲线上任一点的圆弧半径不得小于0.150.

2005年4月26日 · Both UNJ and UN are used for external threads. External UNJ threads per SAE AS8879 have a rounded controlled root radius at the minor diameter. The minimum root radius is calculated at 0.15011p and the maximum root radius is calculated at 0.18042p.

UNJF（Unified National Special Thread, Fine Pitch Thread）螺纹标准是美国国家标准局（ANSI）和联合国标准化组织（ISO）联合发布的一种螺纹标准。 主要应用于高强度和高精度的螺纹连接中，如飞机、航天器、武器和汽车等行业。 与其他螺纹标准相比，UNJF螺纹具有更细的螺距和更小的螺纹角度，提供更高的力和更好的密封性能。 其主要特点包括： unjf螺纹标准-1.具有精度高、加工难度大的特点，要求加工精度应达到±2%或更高。 2.螺距和螺纹角度较小，以提供 …

2006年3月20日 · 3/8-24UNJF-3A是美制航空细牙螺纹，3A是外螺纹的公差，我们有销售这些美制航空航天螺纹的量规。 荣盛专业代理国、内外精密工具、量具、刃具,产品围绕五金的孔、螺纹、切削、模具成型、测量检测为中心。 产品有量具 (千分尺、卡尺、量块、千分表、螺纹环规、塞规,百分表等)、刃具 (丝攻、钻头、铣刀、铰刀等)。 我们不仅与台湾、香港的各进出口公司有着紧密的业务往来,也与国内知名厂商进行合作,代理销售。 为用户提供标准、非标定做产品。 主要产 …