Overview
Plastic-embedded brass nuts are hybrid fasteners featuring a brass threaded insert molded into a plastic body. They bridge the gap between metal strength and plastic versatility, enabling secure fastening in lightweight or non-conductive applications. Commonly used in B2B manufacturing, these nuts eliminate the need for separate metal threading in plastic parts, reducing assembly steps and costs. First developed in the mid-20th century for the electronics industry, these nuts now serve sectors requiring vibration resistance (e.g., automotive dashboards) or electrical insulation (e.g., appliance housings). Their design prevents loosening from thermal expansion differences between materials.
Structure and Working Principle
The nut consists of a knurled or grooved brass insert permanently bonded to an engineered plastic (often nylon or POM) during injection molding. The knurling creates mechanical interlock, preventing rotation under torque. The plastic body distributes stress across the host material, reducing cracking risks. During installation, the plastic portion is pressed or ultrasonically welded into a pre-molded hole in the component. The brass threads then accept standard screws or bolts. This design transfers clamping forces directly to the brass while isolating the plastic from shear stress.
Key Features
1. **Material Synergy**: Brass offers high thread durability (50,000+ cycles), while plastic provides chemical and moisture resistance. 2. **Vibration Damping**: Plastic absorbs harmonics, preventing self-loosening in dynamic loads. 3. **Weight Savings**: 40–60% lighter than all-metal nuts. 4. **Design Flexibility**: Available in flanged, hexagonal, or custom shapes for different mounting needs. Electrical resistivity (1013–1016 Ω·cm) makes them ideal for PCB mounts or EMI-sensitive applications. Temperature tolerance ranges from -40°C to +120°C, depending on plastic grade.
Application Areas
**Automotive**: Instrument panels, light housings, and interior trim fastening. **Electronics**: Enclosures for routers, power tools, and medical devices. **Furniture**: Knock-down fittings for modular systems. **Industrial**: Pneumatic components and conveyor system guides. In B2B procurement, bulk orders often specify UL94 V-0 flame-rated plastics for safety-compliance sectors. Custom colors (e.g., black for UV resistance) are available for outdoor applications like solar panel框架.
Maintenance and Precautions
Avoid using lubricants, which may degrade plastic or reduce friction grip. For disassembly, apply heat below the plastic’s melting point (e.g., 80°C for nylon) to ease screw removal. Inspect for plastic fatigue if reused. Storage should be in low-humidity environments to prevent brass oxidation before molding. Pre-molded holes in host materials must match the nut’s outer diameter within ±0.1mm to ensure press-fit integrity.
B2B Procurement Guide
1. **Volume Pricing**: Orders exceeding 10,000 units typically reduce costs by 15–30%. 2. **Certifications**: Request RoHS/REACH compliance documentation for EU markets. 3. **Lead Times**: Standard sizes (M3–M12) ship in 2–4 weeks; custom molds require 8–12 weeks. Evaluate suppliers based on mold precision (CNC-machined brass inserts preferred) and plastic consistency. Sample testing should include torque resistance (e.g., 2–5 Nm for M6 nuts) and pull-out force (minimum 200N for most applications).
Related Manufacturers
- 主营：[]
- 主营：[]
- 主营：[]
- 主营：自攻螺丝、燕尾螺钉、圆形弹垫、螺母垫片、六角螺母、法兰螺母、压板螺母、拉铆螺母、螺丝螺母、自钻螺钉、活节螺丝、螺栓螺丝、六角螺栓、加大平垫、六角螺丝、法兰螺帽、化学锚栓、自钻螺丝、钻尾螺钉、导向螺钉、焊接螺栓、钻尾螺丝、螺栓垫片、双头螺栓、注塑螺栓
- 主营：预埋件、缩梗螺栓、扭剪螺栓、GB812圆螺母厂家、双头螺栓、预埋螺栓、大六角螺栓、全螺纹螺柱、高强度螺栓、双头螺纹螺栓、地脚螺栓
- 主营：预埋件、胶嵌件、间隔柱、塑胶模、螺母柱、铜柱卷、铜嵌件、铜螺母、塑胶螺母、注塑螺母、焊接螺母、埋置螺母、护套螺母、六角螺母、通孔螺母、冷压螺母、走心机、转换套、滚花带、铝隔套、紧固件、车床定制、限压嵌件、自动车床、修复螺套
- 主营：足球(发球)机、音响外壳、塑料凳、协塑五金塑胶、滚塑模具设计、看台座椅、涉水喉(涉水管)、洗地机外壳
- 主营：超声波塑料焊接机、热熔焊接机、热铆焊接机、螺母埋置机器、海绵焊接机、透气膜焊接机、超声波水口震落机、超声波手持点焊机
- 主营：法兰视镜、法兰对夹视镜、长条视镜、不锈钢牛角手柄螺母、直通视镜、四通视镜、挖孔玻璃、防爆玻璃、高压锅炉、人孔常压、超白玻璃、人孔锅炉、人孔法兰、锅炉配件、玻璃视镜、球阀两片、压力视镜、法兰带刷、压力容器、球阀二片、丝扣球阀、快装球阀、条形视镜、人孔内开、接线端子、DN40丝扣管道视镜
- 主营：cnc轴芯、进气阀、轴芯套、马达铜、五金cnc、铜套数控、六角螺母、雾化器、铝合金、散热片、配件cnc、cnc精密、子弹头、螺纹套、调焦环、cnc数控、口罩机、cnc零件、kn95熔接、kn95齿模、kn95口罩、3d打印机、钟表配件、家电配件、配件长螺
- 主营：四氟漏斗
- 主营：五金包装袋、铝箔袋、尼龙真空袋、屏蔽袋
- 主营：氢氟醚、电子氟化液、AK-225、铜鸡眼清洗剂、六氯丙烯二聚体、六氟丙烯三聚体、3M电子氟化液、HFC-365mfc、PCBA洗板水、环保清洗剂、碳氢清洗剂、马达转子清洗剂、防锈清洗剂、微电机转子清洗剂、干洗油、粉末冶金清洗剂、工业清洗剂、电子清洗剂、医疗器械清洗剂、HCFC-141b、正溴丙烷、甲基吡咯烷酮、无水乙醇、异丙醇、成品油、甲醇乙醇汽油
- 主营：拉铆螺母
- 主营：圆柱销、止退垫、销轴卡簧、防松螺母、尼龙螺母、法兰螺母、五金垫片、六角铜螺母、膨胀螺丝、轴承卡簧、镀锌丝杠、螺纹丝棒、薄头螺钉、开口挡圈、膨胀螺栓、吊环螺栓、花篮螺栓、弹性挡圈、工业齿条、轴用卡簧、碳钢螺丝、热镀锌垫片、不锈钢平键、不锈钢牙条、钢丝绳卡头
- 主营：风电配件、风电锚栓保护帽、风电螺纹护套、风电螺母、防雹网柱帽、防雹网配件
- 主营：自动锁螺丝机、自动铆钉机、自动贴辅料机、自动螺母植入机、非标设备定制
- 主营：旋钮按钮、阻尼缓冲器、塑料门扣、盖形螺母、汽车卡扣、塑料铆钉
- 主营：弹簧扣、开口销、标准件、安全螺母、六角螺母、焊接螺母、肩螺丝、斜垫圈、紧固件、自攻钉、斜垫片、两用扳手、防盗螺丝、止动垫圈、蝶形螺丝、弓形卸扣、自攻螺钉、十字螺钉、组合螺钉、焊接螺钉、钢丝螺套、手拧螺丝、开槽螺钉、皇冠螺钉、法兰螺丝
- 主营：铜蝶形螺母、化学螺栓、预埋螺栓、钢结构螺栓
- 主营：紫铜排、紫铜板、紫铜棒、紫铜管、紫铜带、镀锡铜排、空调紫铜管、铜母线、紫铜箔、黄铜排、黄铜管、黄铜棒、铜套、软连接
- 主营：紫铜排、紫铜管、紫铜棒、紫铜板、止水铜板、紫铜带、铜软连接、空调铜管、黄铜排、黄铜管、黄铜板、黄铜带、覆塑铜管、t2紫铜排、铜母线、机房铜排、电工铜排、红铜管、冷媒铜管、汇流铜排、异形铜排、接地铜排、地铁铜排、铝排、模具焊药
- 主营：路由器纸托、湿压纸托、纸浆托、五金纸托、精品纸托、电子产品内托、化妆品纸托、耳机内托、黑色纸托、茶叶内托、酒类纸托、电器纸托、海绵内托、纸浆模塑、纸板内衬、环保纸托、染色纸托、甘蔗浆纸托、手机纸托、白色纸内托、咖啡纸托、环保精品纸浆托、平板电脑纸托、咖啡粉纸托、纸托