亚洲国产欧美经典三级|精品国产成人高清在线|亚洲色无码专线精品观看|国内色综合精品视频在线|无码专区人妻糸列日韩精品|精品国产一区二区av麻豆|国产草莓精品国产a∨片国产|国产欧美日韩视频一区二区三区

Jiaxing Xincan Hardware Co., Ltd. About USMap Contact

News

Tell

0573-87761990

What are the national standards for modern fasteners?

Time:2019-04-03

1. Standards for fastener product size: specify the basic dimensions of the product; threaded products, including basic thread size, thread finish, shoulder distance, undercut and chamfer, external thread The end size of the part and so on.

2. Standards for technical conditions of fastener products. It mainly includes product tolerances, mechanical properties, surface defects, surface treatment, product testing standards and corresponding specific provisions.

3. Standards for inspection, marking and packaging of screw products: specify the quality level and sampling plan of the project, and the product marking method and packaging requirements.

巴楚县| 绵竹市| 光泽县| 璧山县| 重庆市| 佳木斯市| 东丰县| 三穗县| 娄烦县| 汤原县| 九江县| 安康市| 凤山市| 四平市| 旬邑县| 大宁县| 柯坪县| 五华县| 米泉市| 松滋市| 定陶县| 喀喇| 东海县| 祁连县| 米脂县| 洛川县| 班戈县| 瓮安县| 福泉市| 唐河县| 大方县| 达州市| 岱山县| 南城县| 枣阳市| 大化| 凭祥市| 容城县| 环江| 南投县| 阳江市|