Directly manufactured using high-speed multi-station cold heading and thread-rolling equipment. High pull-out resistance, superior cyclic fatigue endurance, and verified dimensional tolerances.
Conventional self-tapping screws fail in modern thermoplastic resins due to radial stress cracks, micro-creep, and transverse relaxation under continuous vibration. Here is how specialized PT geometry solves it.
Standard machine screws feature a 60° thread angle, which exerts substantial outward radial bursting force on plastic bosses. The PT screw utilizes an acute 30° flank angle, converting driving torque primarily into axial clamp load while eliminating micro-fractures in glass-filled polymers.
For mission-critical assemblies subjected to broad thermal cycling (-40°C to +125°C), we integrate microencapsulated chemical adhesives (precote®, Loctite®) or reusable nylon polyamide patches. This creates prevailing torque resistance even if axial preload drops due to polymer relaxation.
The widened thread pitch combined with an expanded root diameter allows plastic materials to flow plastically into the inter-thread cavity during thread cutting or displacement. This design prevents thermal friction binding while maximizing shear engagement area.
Engineered for lightweighting initiatives and high-vibration structural connections where stripped bosses, loosening, or particulate contamination cannot be tolerated.
In electric vehicle battery management systems and under-hood sensor housings (PA66-GF30, PBT), temperature cycling causes differential thermal expansion. Anti-loosening PT screws maintain consistent clamping torque without cracking delicate resin bosses.
End-of-arm tooling, servo drive motor brackets, and automated guided vehicles (AGVs) experience continuous harmonic excitation. Our hardened PT fasteners eliminate the need for costly threaded brass inserts, reducing overall structural weight.
Miniature M1.2 to M2.5 pan-head PT fasteners secure internal structural brackets, optical sensor modules, and acoustic components in smartphones, drones, and ruggedized communication tablets without particulate generation.
Operating from our multi-site production facilities in Dongguan, Shaoguan, and Wuhan, we provide vertical manufacturing integration from wire rod annealing to automated packaging.
Procuring fasteners from China has evolved beyond simple unit-cost efficiency. Modern multinational Tier-1 suppliers demand strict supply continuity, immediate metallurgical transparency, and compliance with stringent international regulatory frameworks. YH Fastener addresses these requirements through end-to-end traceability, operating across a combined 20,000 square meters of production space.
Our plants are equipped with high-precision multi-stage cold headers, precision thread formers, continuous atmosphere-controlled heat-treatment furnaces, and integrated automatic optical sorting machines that detect dimensional variances and plating defects at speeds of up to 800 parts per minute. This level of quality control ensures an automotive-grade zero-defect policy (sub-50 PPM delivered quality), backed by comprehensive IATF 16949, ISO 9001, and ISO 14001 certifications.
| Parameter | Technical Engineering Standard |
|---|---|
| Available Thread Sizes | PT10, PT12, PT14, PT16, PT18, PT20, PT22, PT25, PT30, PT35, PT40, PT50 (Standard and Custom Pitches) |
| Material Grades | Case Hardening Carbon Steel (1022A, 10B21), Stainless Steel SUS302, SUS304, SUS316, Austenitic A2-70 / A4-80 |
| Head Configurations | Pan Head, Flat Countersunk Head, Truss Head, Flange Head, Oval Head, Custom Shoulder Dimensions |
| Drive Types | Phillips (Cross Recessed Type H/Z), Torx (Six-Lobe), Tamper-Resistant Pin-in-Torx, Slotted/Combo |
| Surface Treatments | Cr3+ Blue/Clear Zinc Plating, Yellow Zinc, Black Zinc, Electrophoretic Coating, Dacromet, Ruspert, Nickel |
| Anti-Loosening Features | Nylon Blue Patch (360° or 180° Wrap), Precote Microencapsulated Threadlockers, Under-Head Locking Serrations |
| Global Compliance | RoHS 2.0 (2011/65/EU), REACH (EC 1907/2006), IMDS Automotive Database Registration, Proposition 65 |
Fastener technology is advancing alongside next-generation polymers and automated lightweight assembly systems.
As automotive OEMs adopt bio-based polyamides, polyketones (POK), and long-glass-fiber reinforced composites, we calibrate custom helix pitches and variable thread depths to maximize strip-to-drive torque ratios, preventing assembly line strip-outs.
Automated assembly demands precise screw shank straightness, strict perpendicularity tolerances under the head, and consistent recess depths. Our fasteners are engineered for frictionless blow-feed screwdrivers with near-zero jam rates.
We are expanding the development of thin-film zinc-flake and eco-friendly electroplating systems that exceed 1,000 hours of neutral salt spray testing (ASTM B117) without hydrogen embrittlement risks or toxic hexavalent chromium byproducts.
Engineered for cleanroom electronics, rugged outdoor enclosures, robotic joints, and automotive control modules.
Comprehensive engineering guidance on specification, assembly torque calculations, and tooling compatibility for anti-loosening PT fasteners.
A standard self-tapping screw (such as Type AB or B) is engineered for sheet metal and features a standard 60° thread angle. Driving this profile into thermoplastics generates severe radial stress that often cracks the plastic boss. The PT screw utilizes an acute 30° thread profile and an expanded root volume, reducing radial expansion while directing clamp force axially and improving thread engagement.
Thermoplastic materials naturally undergo micro-creep and stress relaxation when exposed to dynamic loads and heat cycles, which reduces clamping tension over time. Pre-applied nylon locking patches or microencapsulated chemical adhesives bridge the tolerance gap between the screw and female plastic thread, delivering steady prevailing torque even when axial tension decreases.
Yes. Because the 30° flank cuts or displaces plastic with minimal wall deformation, the female thread remains dimensionally stable. For field-serviceable applications, we recommend pairing our carbon steel or 304 stainless steel PT screws with reusable polyamide patches, which provide consistent prevailing torque through multiple insertion cycles.
All our production facilities operate under IATF 16949, ISO 9001, and ISO 14001 management systems. Raw materials are verified with mill test certificates prior to cold heading, and finished lots undergo high-speed automated optical sorting to verify dimensions and check for defects. Shipments include Full Inspection Reports (FAI), Salt Spray Test logs, and material certifications per RoHS and REACH directives.
