TNHO Serrated Flange Hex Nuts & Lock Nuts for Fastening
Our serrated flange hex nuts, nylon insert lock nuts and plain flange nuts are made of high-strength steel with zinc,...
Our heavy-duty terminal bolts include serrated hex flange bolts, standard hex bolts and square head serrated bolts in sizes M8, M10, M12, M16, ranging from short 12.7mm up to ultra-long 260mm. Made of high-grade carbon steel with galvanized or stainless steel finish, these fasteners are engineered for high-load wiring locking on electric meter terminal blocks and power distribution equipment. Serrated flange design delivers anti-slip & anti-loosening performance under current-induced vibration, while high tensile strength meets heavy-load electrical connection requirements for indoor and outdoor power metering facilities.
| System of Measurement | Metric |
|---|---|
| Material | 4.8/8.8 Grade Carbon Steel, 304 Stainless Steel |
| Core Specs | M8, M10, M12, M16; Length:12.7~260mm, custom available |
| Head Type | Serrated Hex Flange Head, Standard Hex Head, Square Serrated Head |
| Surface Finish | Zinc Plating, Hot-Dip Galvanized, Stainless Steel Passivation |
| Production Process | Cold Heading, Thread Rolling, Precision CNC Machining |
| Executive Standard | ISO, DIN, GB, ANSI, Non-standard per customer drawing |
| Mechanical Grade | 4.8, 8.8 High Tensile Strength Grade |
| Application | Electric Meter Terminal Block, Heavy Load Wiring, Power Distribution Cabinet |
1.Anti-slip serrated flange structural design: Circumferential serrations under flange head dig into installation surface to stop bolt rotating and terminal loosening under long-time equipment vibration.
2.Multi-spec heavy-duty dimensional coverage: Sizes span M8 to M16 with length from short 12.7mm to ultra-long 260mm to fit various heavy-load terminal assembly scenarios.
3.Two optional high-performance raw materials: High tensile carbon steel for cost-effective bulk use and stainless steel for corrosion-prone outdoor damp electrical installation conditions.
4.Precision rolled high-strength thread design: Thread rolling processing improves tensile and shear strength to bear heavy current load without thread sliding or fracture.
5.Diversified head type matching options: Square head, standard hex and serrated flange three styles adapt different terminal block groove structures and installation tool demands.
Optimized for heavy-load terminal electrical connection
Developed per power industry heavy-current wiring standards to effectively reduce terminal loose and overheating failure risk in power equipment.
Excellent all-weather anti-corrosion surface treatment
Galvanized and passivation finishes resist rain, moisture and corrosive gas to extend service life of outdoor installed meter terminals.
Flexible full drawing-based customization service
We adjust head shape, serration layout, thread length and material strictly following clients’ unique terminal block design requirements.
Strict mechanical performance quality inspection
Each batch undergoes tensile and hardness testing to guarantee stable load-bearing capacity for long-term heavy-load wiring working.
Spot inventory of mainstream regular specifications
Common M8/M10/M12/M16 sizes are stocked to support customers’ small sample orders and urgent bulk delivery rapidly.
Wide compatibility for global power equipment
Conforms to international fastener standards, applicable for various domestic and imported electric meter terminal and distribution cabinet assembly.
