描述

1. 超高强度等级：严格达到12.9级国际标准，抗拉强度≥1200MPa，屈服强度≥1080MPa，远超普通8.8级螺栓，可承受极端重载，是汽车底盘、工程机械等关键连接的核心选型。

2. 专业发黑防护：采用高温氧化发黑工艺，形成致密耐磨防护膜，有效隔绝湿气与腐蚀，提升防锈耐蚀性，适配户外、工业潮湿等复杂工况。

3. 法兰一体设计：自带一体式法兰盘，无需额外搭配平垫片，即可增大受力面积、分散压力，既提升安装效率，又增强防松抗震性能，适配严苛振动环境。

4. 全流程品控：聚云锐紧固件深耕紧固件领域20年，从优质合金结构钢原料采购，到冷镦成型、调质热处理、发黑处理全流程自主把控，通过ISO9001质量管理体系认证，每批次产品均附材质检测报告，品质可追溯。

5. 定制化服务：常规规格覆盖M6-M30全系列，长度、螺纹精度、法兰尺寸可按客户图纸/需求定制，支持OEM/ODM代工，兼顾小批量试样与大批量外贸订单交付。

1. Ultra-High Strength Grade: Strictly meets Grade 12.9 international standards, with tensile strength ≥1200MPa and yield strength ≥1080MPa, far exceeding ordinary Grade 8.8 bolts. It can withstand extreme heavy loads, making it the core selection for key connections such as automobile chassis and construction machinery.

2. Professional Black Oxide Protection: Adopts high-temperature oxidation blackening process to form a dense and wear-resistant protective film, effectively isolating moisture and corrosion, improving rust and corrosion resistance, and suitable for complex working conditions such as outdoor and industrial humid environments.

3. Integrated Flange Design: Equipped with an integrated flange disc, there is no need to match additional flat washers. It can increase the stress area and disperse pressure, not only improving installation efficiency but also enhancing anti-loosening and seismic performance, adapting to severe vibration environments.

4. Full-Process Quality Control: Juyunrui Fasteners has been deeply engaged in the fastener field for 20 years. We independently control the whole process from high-quality alloy structural steel raw material procurement to cold heading forming, quenching and tempering heat treatment, and blackening treatment. Certified by ISO9001 quality management system, each batch of products is attached with material inspection reports, and quality is traceable.

5. Customized Services: Conventional specifications cover the full series of M6-M30. Length, thread accuracy, and flange size can be customized according to customer drawings/requirements, supporting OEM/ODM contract manufacturing, and adapting to small-batch sample testing and large-batch foreign trade order delivery.