Ultra-High Resilience Precision Fasteners &
Vacuum Heat Treatment
Electronics Online Co., Ltd. provides ultra-high resilience screws engineered with advanced Vacuum Heat Treatment (真空热处理). Achieve unyielding torque strength, consistent hardness, and 100% elimination of hydrogen embrittlement risks for high-reliability industrial & electronic devices.
Super Resilience Screws via Vacuum Heat Treatment
Traditional electroplating or conventional carbonitriding induces hydrogen embrittlement (氢脆现象), leading to sudden head snaps under tension. Our proprietary Vacuum Heat Treatment (真空热处理) eliminates oxidation, homogenizes microcrystalline steel matrix, and delivers optimum hardness with elastic resilience.
Zero Hydrogen Embrittlement
Processed in oxygen-free vacuum furnaces at 10⁻³ Pa. Ensures complete degassing of trapped atomic hydrogen, preventing catastrophic post-assembly fractures.
Ultra-Stable Torque Curve
Maintains smooth torque transmission across tight thread profiles without thread stripping (滑牙) or head shearing.
Consistent Surface & Core Hardness
Uniform Vickers Hardness gradient (520 - 580 HV0.3) without decarburization layer, ensuring extreme wear resistance.
Torque vs Hardness Stress Curve
Comparing Yield Torque (Nm) against Surface Hardness (HV)
Interactive B2B Product Catalog
High-precision electronic fasteners, anti-loosening screws, step screws, and industrial hardware manufactured to DIN / ISO / JIS standards.
Interactive Head & Thread Guide (基本牙型与头型指南)
Select thread profiles and drive head geometries below to inspect exact dimensional profiles, mechanical applications, and material mating rules.
Thread Profile Types (牙型) ISO / JIS / DIN
60° thread angle. M1.2 to M10 pitch standard for pre-tapped metal or nut assembly.
Sharp thread cutting point. Creates internal female threads without pre-tapping.
Trilobular cross-section reduces friction torque while enhancing anti-vibration lock.
30° steep thread angle for high pull-out load resistance in soft plastic housings.
Head Geometries & Drives (头型) CAD Standard
Precision Quality Control & Testing Instruments
Every fastener batch undergoes rigorous metallurgical, chemical compliance, micro-hardness, and salt spray corrosion testing in our Dongguan manufacturing testing facility.
RoHS Spectrometer
Skyray EDX3000B
X-ray fluorescence elemental analysis ensuring 100% compliance with EU RoHS 3.0 & REACH heavy metal directives (Pb, Cd, Hg, Cr6+).
.JPG)
Micro Vickers Hardness Tester
SCTMC MHV-1000Z
Digital micro-hardness measurement up to 1000 HV. Analyzes case depth, core hardness, and vacuum heat treatment gradients.
.JPG)
Salt Fog Corrosion Chamber
YWX-150 Standard Chamber
Accelerated neutral salt spray (NSS) testing validating 24hr to 500hr+ red-rust prevention ratings for zinc, nickel, and black oxide plating.
.jpg)
Precision Dial Torque Wrench
Kanis A130 Calibration
High-precision mechanical dial torque analyzer validating break-away torque, seating torque, and locking patch torque limits.
Hong Kong HQ & Mainland Operations
Integrated supply chain across Hong Kong international trading hub, Shenzhen commercial center, and Dongguan manufacturing complex.
Electronics Online Company Limited
Room B, 16/F, Euro Trade Centre, 9 Chiu Lung Street, Central, Hong Kong Island
香港島中環昭隆街9號歐銀中心16F Room B
深圳市仕可利貿易有限公司
Room 718, Huarong Building, Central District, Futian District, Shenzhen, Guangdong
廣東省深圳市福田區中心區華融大廈718
Dongguan Production Plant
Dalong 1st Road, Youganpu, Fenggang Town, Dongguan City, Guangdong Province, China
廣東省東莞市鳳崗鎮油甘埔大龍一路
Direct B2B Inquiry Channel
Send technical drawings, custom sample requirements, or RFQ spreadsheets directly to our senior sales engineers.