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CNC Knurled Large Head Insert Nut, Precision Molding Embedded Fastener
| Place of Origin | GuangDong Dongguan |
| Brand Name | SITUO |
| Certification | ISO9001 & TS16949 |
| Model Number | ST2026-500011 |
This CNC knurled large head nut is a pre-inserted insert dedicated to plastic injection molding, integrally processed by CNC turning. Its outer wall is fully knurled for anti-slip locking, matched with an enlarged wide head structure. It is widely used for insert molding of AI smart devices, 3C electronic housings, sensor brackets and industrial control plastic shells.
The widened large head expands the pressure-bearing contact area with plastic, preventing sinking or shell penetration after molding. Combined with dense outer knurling for firm interlocking, the nut boasts superior pull-out and torsion resistance. It performs stably under long-term vibration and wide temperature changes, effectively avoiding loosening, spinning and falling off.
All internal threads are precisely CNC turned and fully inspected piece by piece after production in compliance with metric standards with complete thread profiles. Screws thread in smoothly without jamming, incomplete threads, burrs or mismatched fit. It runs well on automatic assembly lines and resists thread slipping after repeated tightening, maintaining stable assembly precision of AI modules.
One-clamp CNC machining tightly controls narrow tolerance ranges for large head thickness, outer diameter, thread pitch diameter and overall length, delivering high dimensional consistency within the same batch. The uniform-thickness large head without eccentricity ensures consistent embedding depth during injection molding, free of uneven protrusions or depressions, perfectly matching fully automatic injection production lines without manual sorting.
Flexible deburring treatment removes all flash and sharp edges on the large head surface, knurl edges and thread openings. It will not scratch plastic substrates during molding, nor damage PCB circuits, sealing gaskets and tiny precision sensor parts during assembly, preventing short circuits and appearance defects of electronic devices.
- Insert Molding for Plastic Housings of AI Smart Equipment: Ideal for industrial inspection robots, visual inspection machines and edge computing cabinet shells. The large head disperses molding stress while knurling locks the plastic tightly. The nut stays fixed under 24/7 high-frequency vibration to stabilize sensor positioning and ensure accurate AI data recognition.
- Injection Molding for 3C Consumer Electronic Housings: Suitable for smart home terminals, AI cameras and portable computing equipment shells. The compact enlarged head saves limited internal space, and brass or stainless steel options withstand humid enclosed environments.
- Plastic Modules for Tooling & Small Automation Equipment: Applied to testing jigs and small transmission plastic brackets. High torsion resistance prevents nut spinning during long-term reciprocating operation of automation machinery.
Point 1: Standard small-head nuts have weak pull resistance and slip out under equipment vibration
Solution: The widened large head expands contact pressure area, and full-circle outer knurling boosts friction with plastic, greatly improving pull-out and torsion resistance against long-term vibration displacement and rotation.
Point 2: Low-precision threads cause screw slipping and high product rework rate
Solution: Threads are shaped by dedicated CNC tools with 100% gauge inspection. Standard pitch and thread profile deliver even locking force and reduce rework rate of electronic products.
Point 3: Sharp burrs scratch plastic shells and circuit boards during molding and assembly
Solution: Full-range deburring delivers smooth contact surfaces to fully protect plastic housings and precision electronic components during insertion and assembly.
SITUO Hardware specializes in CNC knurled large head insert molding nuts. We customize overall length, thread specifications (M2-M6), large head outer diameter and knurl depth according to plastic shell structures. Brass and SS304 stainless steel material options are available for high thermal conductivity or anti-corrosion demands.
Supported by three-stage quality control: precision CNC machining, full thread gauge testing and full visual appearance inspection, we steadily supply high-tensile knurled large head inserts with stable tolerance and burr-free finish, providing highly reliable pre-embedded fastener solutions for injection molding of AI hardware, 3C electronics and automation equipment.
Advanced Manufacturing Capabilities: We have introduced advanced equipment and technology from Japan and Germany (CNC 5-axis and 6-axis machines) to better serve our customers' needs.
Precision Specifications: Our maximum processing outer diameter is 60, and the minimum control tolerance is 0.001.
Comprehensive Equipment: We have Japanese CNC Tsugami, CNC Citizen, multi-station cold extrusion forming machines, 500T press machines, casting equipment, and various process equipment, which can effectively provide customers with the best technical solutions.
Quality Management: Our company implements 8S management and has passed ISO9001 and TS16949 automotive certifications.
Notable Clients: Our customers include bo-sch, Foxconn, Motors, Husqvarna, Shimano, NVIDIA, DJI Drones, Siegenia, and Cater-pillar.
| Main Products | Stainless steel screws, carbon steel screws, pins, rivets, nuts, eccentric nails, embedded parts, and other fasteners. |
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| Business Type | Factory / Manufacturer |
| Services | CNC Machining, Turning and Milling, CNC Turning, Cold heading, Stamping, Assembly Service |
| Materials |
Aluminum: AL 6061-T6, 6063, 7075-T etc
Stainless steel: 303,304,304L,316L,316F,630,410,420,430, etc
Steel: 4140, Q235, Q345B,20#,45# 1215,12L14,1144,1006,1008,1010,1015,1018,10B21,1035,1065 etc.
Alloy steel: 5140,4135,4140,3435,5120,415,435,440 etc
Titanium: TA1,TA2/GR2, TA4/GR5, TC4, TC18 etc
Brass: C36000 (HPb62), C37700 (HPb59), C26800 (H68), C22000(H90),C27000,C51900,C11000,C3604,H62,H65 etc
Copper, bronze, Magnesium alloy, Delrin, POM, Acrylic, PC, etc.
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| Finishes | Sandblasting, Anodize color, Blackenning, Zinc/Nickl Plating, Polish, Power coating, Passivation PVD, Titanium Plating, Electrogalvanizing, electroplating chromium, electrophoresis, QPQ(Quench-Polish-Quench), Electro Polishing, Chrome Plating, Knurl, Laser etch Logo, etc. |
| Drawing Format | STEP, STP, GIS, CAD, PDF, DWG, DXF etc or samples. |
| Tolerance | +/-0.01mm ~ +/-0.05mm |
| Surface Roughness | Ra 0.1~3.2 |
| Inspection | Complete inspection lab with Micrometer, Optical Comparator, Caliper Vernier, CMM Depth Caliper Vernier, Universal Protractor, Clock Gauge, Internal Centigrade Gauge |
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