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Hexagon External Pre-embedded Screw with Anti-rotation Hexagonal Structure for High Embedding Stability and Precision Thread Machining

Categories CNC Screws
Payment Terms: T/T
product name: Hexagon screw
Color: Customized
Brand Name: SITUO
head shape: Circle Head Hexagon
Packaging Details: Communication
Material: stainless steel
Model Number: ST-300050
Category: Screws
MOQ: 1PCS
Delivery Time: Communication
Length: 31MM
Sample period: 20 days
Place of Origin: GuangDong Dongguan
Precision: Min0.01
Price: 5-10 USD per item
Specification: Customized
Processing technology: Cold heading & CNC
Supply Ability: 10000PCS per day
Corrosion Resistance: High
Surface treatment: Passivation
Certification: ISO9001 & TS16949
Size: 12.0MM
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  • Company Profile

Hexagon External Pre-embedded Screw with Anti-rotation Hexagonal Structure for High Embedding Stability and Precision Thread Machining

Hexagon External Pre-embedded Screw
Product Overview

External Hex Pre-embedded Screw is a professional anti-rotation insert fastener specially designed for plastic injection molding embedding installation. Unlike ordinary straight-body embedded studs, this screw features an outer hexagonal structure design that forms a perfect occlusion lock with plastic material, effectively preventing thread slipping, rotation, and loose pulling during repeated assembly and disassembly.

All our hex insert screws are processed by precision CNC turning and precise thread rolling, featuring uniform thread pitch, smooth surface, no burrs, and high dimensional consistency. This greatly improves the tensile resistance and structural stability of plastic parts connections. Widely used in electronic housings, home appliance plastic parts, intelligent equipment structural parts, and injection molding accessories. We provide full non-standard custom service for different diameters, lengths, thread specifications, and special structural embedded screws.

Key Features
  • Anti-rotation Hexagonal Structure: Outer hex design provides strong bite force with plastic materials, completely solving the problem of screw rotation and slipping of traditional straight embedded studs.
  • High Embedding Stability: Multi-sided hexagonal contact structure increases combination area with plastic, effectively improving pull-out resistance and shear resistance.
  • Precision Thread Machining: Standard thread profile ensures smooth locking and repeated assembly, no thread slipping or jamming.
  • Durable Material Performance: Made of high-quality carbon steel or stainless steel, with high hardness and toughness, suitable for long-term use in plastic assembly structures.
  • Fit for Injection Molding Process: Support one-time pre-embedding molding, simplifying production process and improving assembly efficiency and product consistency.
  • Full Custom Machining: Custom thread size, outer diameter, length, hexagonal size and special-shaped embedding structure according to drawings and samples.
Product Specifications
  • Product Name: External Hex Pre-embedded Insert Screw
  • Material: Carbon Steel / Stainless Steel 304
  • Structure: External Hex Anti-rotation Body + Thread Stud
  • Processing: CNC Precision Turning, Thread Rolling, Fine Deburring
  • Surface Treatment: Zinc Plating, Nickel Plating, Black Oxide, Passivation
  • Function: Plastic embedding fixing, anti-rotation positioning, injection molding assembly reinforcement
  • Characteristic: Anti-slip, anti-rotation, high pull-out strength, stable connection
  • Application: Plastic injection molding, electronic shell, home appliance parts, automation plastic components
Applications

External hex pre-embedded screws are widely used in various plastic injection molding products, including electronic equipment shells, household appliance structural parts, intelligent device accessories, automotive plastic parts, and industrial plastic assemblies. It is the optimal hardware solution to solve loose thread, rotating failure, and insufficient pulling force of plastic mounting holes.

Frequently Asked Questions
What is an external hex pre-embedded screw used for?
It is a special embedded fastener for plastic injection molding. The outer hexagonal structure provides anti-rotation function to ensure stable thread positioning after embedding in plastic parts.
Why use hex insert screw instead of straight insert screw?
Straight studs are easy to rotate and slip. The hexagonal outer structure can lock the plastic tightly, avoid idle rotation, and greatly improve assembly durability and firmness.
Can you customize non-standard embedded screws?
Yes, we support full custom machining of diameter, length, thread specification and special anti-rotation structures to match different molds and products.
What surface treatments are available?
We provide galvanizing, nickel plating, blackening and stainless steel passivation to achieve anti-rust and anti-corrosion performance for different working environments.
Manufacturing Capabilities

We have introduced advanced equipment and technology from Japan and Germany (CNC 5-axis and 6-axis machines). Our maximum processing outer diameter is 60mm, and the minimum control tolerance is 0.001mm.

Equipment Portfolio

Japanese CNC Tsugami, CNC Citizen, multi-station cold extrusion forming machines, 500T press machines, casting equipment, and various process equipment.

Company Scale

300 employees including 20 technicians, 10 engineers, and 15 quality control personnel with over 300 pieces of equipment.

Quality Certifications

8S management, ISO9001 and TS16949 automotive certifications.

Notable Customers

Foxconn, Husqvarna, Shimano, NVIDIA, DJI Drones, Siegenia, and Cater-pillar.

Our Capacity
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
  • Copper, bronze, Magnesium alloy, Delrin, POM, Acrylic, PC, etc.
Finishes

Sandblasting, Anodize color, Blackening, Zinc/Nickel Plating, Polish, Powder coating, Passivation PVD, Titanium Plating, Electrogalvanizing, electroplating chromium, electrophoresis, QPQ, Electro Polishing, Chrome Plating, Knurl, Laser etch Logo, etc.

Drawing Formats

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

Product Images
CNC screw close-up view showing precision machining M4 flat head quick release valve screw Straight tooth CNC screw profile Precision screw manufacturing quality CNC screw application in automation Industrial screw close-up detail Precision screw manufacturing process CNC screw quality inspection Automation industry screw application High-precision screw manufacturing CNC screw technical specifications Industrial fastener quality control
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