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Stainless Steel Blind Hole Insert Nut with Pineapple Knurl Pattern and Closed Blind Hole Design for Plastic Housing
| Place of Origin | GuangDong Dongguan |
| Brand Name | SITUO |
| Certification | ISO9001 & TS16949 |
| Model Number | ST2026-500034 |
Closed Blind Hole Design Blind Hole Insert Nut
,Pineapple Knurl Pattern Knurled Embedded Nut
,Stainless Steel Material Injection Molding Pre-Insert Nut
Situo Hardware specializes in custom manufacturing of pineapple pattern blind hole insert nuts, knurled blind embedded nuts and injection molding pre-insert nuts. These products are widely used in plastic housings, smart home accessories, furniture plastic parts, electromechanical equipment shells and injection molded products, serving as professional precision fasteners for plastic embedding, anti-rotation and anti-loosening assembly.
This series of pineapple knurled blind insert nuts adopts a unique pineapple pattern outer knurl and closed blind hole structure. Different from ordinary through-hole knurled nuts, the fully closed bottom effectively prevents plastic overflow and glue penetration, keeping the internal thread clean and unblocked. The three-dimensional pineapple pattern provides stronger gripping force, enabling tight embedding with plastic materials and excellent anti-rotation, anti-drop and anti-slip performance.
Made of high-quality stainless steel, brass and carbon steel with precise thread processing, the nuts support multiple installation methods such as injection embedding, thermal embedding and ultrasonic embedding. Full non-standard customization is available, and the specific production cycle can be confirmed with customer service.
The fully sealed blind hole structure completely blocks plastic melt penetration during injection molding, effectively solving common problems such as thread clogging, glue residue and jamming. It keeps internal threads intact and clean, ensuring smooth screw assembly without secondary trimming, greatly improving product yield and assembly efficiency.
The three-dimensional staggered pineapple knurl features larger contact area and deeper embedding than ordinary straight and mesh knurling. After plastic curing, the nut is firmly locked inside the plastic shell, with excellent anti-torsion, anti-tensile and anti-vibration capabilities. It effectively avoids idle rotation, slipping and falling off during long-term use, ensuring stable fastening strength.
Available in stainless steel, brass and carbon steel. Stainless steel offers superior rust and corrosion resistance for outdoor and high-end smart home products; brass features good toughness and conductivity without scratching plastic parts; carbon steel provides cost-effective solutions for mass conventional plastic product supporting.
With high precision and good concentricity, the nuts support multiple installation processes including injection pre-embedding, thermal hot melting, ultrasonic embedding and press-in installation. They will not skew, crack or displace during assembly, ensuring flat appearance and stable structure of finished plastic products, suitable for assembly line mass production.
Support cold forging mass production for standard specifications with fast delivery and high cost performance, and CNC precision machining for high-precision and special non-standard structures. Flexible process matching meets the needs of mass batch orders and high-end customized products, with negotiable delivery cycle confirmed by customer service.
Adopting precise thread rolling and turning technology, the threads are full, neat and burr-free. The screws fit smoothly without jamming or slipping. It maintains stable meshing accuracy after repeated disassembly and assembly, improving product assembly texture and service life while reducing after-sales failure rate.
Customizable outer diameter, total length, thread pitch, blind hole depth, knurl density and chamfer specification. Special styles such as elongated, thickened and ultra-thin nuts are available, supporting new product R&D and structural modification of smart home and plastic mold accessories for small and large batch orders.
- Injection molding embedding fastening for smart home plastic shells and electronic product housings
- Anti-rotation and anti-drop embedded fixing for furniture plastic structural parts
- Pre-insert nut assembly for electromechanical equipment shells and instrument plastic parts
- Special embedded nuts for injection mold forming, thermal melting and ultrasonic embedding
- Anti-corrosion and moisture-proof embedded fasteners for outdoor plastic products
- All plastic assembly scenarios requiring anti-clogging, anti-rotation and high-stability fastening
We have introduced advanced equipment and technology from Japan and Germany (CNC 5-axis and 6-axis machines) to better serve our customers' needs. Our maximum processing outer diameter is 60mm, and the minimum control tolerance is 0.001mm.
Our company has a total of 300 employees, including 20 technicians, 10 engineers, and 15 quality control personnel. We have over 300 pieces of equipment and implement 8S management with ISO9001 and TS16949 automotive certifications.
Notable customers include Bo-sch, Foxconn, Husqvarna, Shimano, NVIDIA, DJI Drones, Siegenia, and Ca-terpillar.
| Main Products | Stainless steel screws, carbon steel screws, pins, rivets, nuts, eccentric nails, embedded parts, and other fasteners |
|---|---|
| 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 Other: Copper, bronze, Magnesium alloy, Delrin, POM, Acrylic, PC, etc |
| Finishes | Sandblasting, Anodize color, Blackening, Zinc/Nickel 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 |
We focus on non-standard customization of various embedded insert nuts with mature dual-process production lines, specializing in plastic injection fastener supporting. Full workflow: material screening & cutting → cold forging / CNC integral forming → pineapple knurl processing → blind hole finishing → precision thread rolling → deburring & polishing → full dimension inspection → sampling test → packaging & delivery.
Standard specifications are in stock with fast delivery, and non-standard custom products support rapid sample making and mass production. The specific production cycle can be confirmed with customer service. We provide complete material test reports and quality certificates, supporting engineering bulk packaging and export-grade packaging, offering one-stop customized solutions for plastic product pineapple knurled blind insert nuts.
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