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QC/T 350-2023: Plastic split dowel Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid QC/T 350: Historical versions
QC/T 350-2023: Plastic split dowel---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/QCT350-2023QC AUTOMOTIVE INDUSTRY STANDARD ICS 43.040 CCS T 31 Replacing QC/T 350-1999 Plastic Split Dowel Issued on. DECEMBER 20, 2023 Implemented on. JULY 1, 2024 Issued by. Ministry of Industry and Information Technology of the People’s Republic of China Table of ContentsForeword... 7 1 Scope... 8 2 Normative References... 8 3 Terms and Definitions... 8 4 Type and Size... 8 5 Technical Requirements... 10 6 Product Number... 11ForewordThis Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for Standardization – Part 1.Rules for the Structure and Drafting of Standardizing Documents. This Document replaced QC/T 350-1999 Protective Cap for Nut. Compared with QC/T 350- 1999, the major technical changes of this Document are as follows. --- Add the types and sizes of plastic split dowel bodies and plastic dowels (see Clause 4 of this Edition); --- Add material requirements, surface defect requirements, temperature resistance requirements, insertion force and extraction force requirements, general dimensional tolerance requirements, prohibited substance requirements, and combustion characteristics requirements (see Table 4 of this Edition). This Document was proposed by and under the jurisdiction of National Technical Committee of Auto Standardization (SAC/TC 114). Drafting organizations of this Document. China First Automobile Group Co., Ltd.; China National Heavy Duty Truck Group Co., Ltd.; Faw Jiefang Automotive Company; Beijing Automotive Research Institute Co., Ltd.; Anhui Jianghuai Automobile Group Co., Ltd.; and Sichuan Aerospace Shiyuan Auto Parts Co., Ltd. Chief drafting staffs of this Document. Yang Chaoyang, Jiang Xiangdong, Shi Haonan, Sun Chao, Wang Wei, Luan Jianxin, Chang Yaohong, Yu Hongyang, Luo Hong, Li Wanjiang, and Wei Xiaohua. The historical editions replaced by this Document are as follows. --- ZB/T 31027-1987; --- QC/T 350-1999; --- It is second-time revised hereby. Plastic Split Dowel1 ScopeThis Document specifies the type, size, technical requirements and product number of plastic split dowel. This Document applies to plastic split dowel used to fix decorative parts on automobiles.2 Normative ReferencesThe provisions in following documents become the essential provisions of this Document through reference in this Document. For the dated documents, only the versions with the dates indicated are applicable to this Document; for the undated documents, only the latest version (including all the amendments) is applicable to this Document. GB/T 90.1 Fasteners – Acceptance inspection GB/T 90.2 Fasteners – Marking and packaging GB/T 8410 Flammability of automotive interior materials GB/T 30512 Requirements for Prohibited Substances on Automobiles QC/T 326 Coding rules for automotive standardized parts QC/T 29017 Automotive molded plastic parts without individual tolerance limit the size of the deviation3 Terms and DefinitionsFor the purposes of this Document, no terms and definitions are necessary to be given.4 Type and SizeThe type and size of plastic split dowel is shown in Figure 1, Table 1, Figure 2, Table 2, Figure 3, and Table 3.5 Technical RequirementsThe technical requirements for plastic split dowel are shown in Table 4. Basic size Limit deviation Limit deviation Limit deviationBasic size Basic size Limit deviation Basic size Basic size Basic sizeLimit deviation Limit deviation Material Made of polyethylene plastic, polyacetal resin, amide plastic or similar plastics General dimensional tolerance QC/T 29017 High-temperature resistance No cracks or other abnormal phenomena, when the products are placed in the environment at (120±2) °C for 24h Low-temperature resistance No cracks or other abnormal phenomena, when the products are placed in the environment at (-40±2) °C for 24h Combustion characteristics GB 8410 Insertion force During installation, insertion force of the dowel core is ≤ 60N Extraction force After installation, the extraction force of dowel body is ≥ 400N Surface defects Remove burrs and flash Prohibited substances The products for passenger cars need to comply with the provisions of GB/T 30512 Acceptance and packaging As per GB/T 90.1 and GB/T 90.2; thereof, AQL=4.0.If there are special requirements, it shall be negotiated between the supplier and the purchaser6 Product NumberThe product number of plastic split dowel shall implemented according to the provisions of QC/T 326. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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