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Vichok Hardware

GB819 304/316 Stainless Steel Hollow Screw Countersunk Phillips Vacuum Through-Hole Exhaust Bolt

GB819 304/316 Stainless Steel Hollow Screw Countersunk Phillips Vacuum Through-Hole Exhaust Bolt

Regular price $0.54 USD
Regular price $0.54 USD Sale price $0.54 USD
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304/316 stainless steel precision screws, compliant with GB819 standards, feature a countersunk head, Phillips drive, and integrated hollow through-hole design. Engineered for vacuum and exhaust applications, they balance secure threading fastening with efficient air ventilation and pressure balance, catering to diverse corrosion resistance needs. Dual material options—304 SS for general environments and 316 SS for harsh, humid, or chemical settings—ensure long-term stability, while the countersunk Phillips design enables flush mounting and easy operation with standard tools. Ideal for vacuum equipment, exhaust systems, precision instruments, and industrial assemblies requiring both anti-rust performance and reliable through-hole venting.
 

Core Features & Advantages

 
  • Dual 304/316 SS Anti-Corrosion: 304 stainless steel delivers reliable rust and oxidation resistance for daily industrial use; 316 SS enhances durability against saltwater, chemicals, and high humidity, adapting to demanding vacuum/exhaust scenarios.
  • GB819 Standard Compliance: Adheres to Chinese national GB819 specifications, guaranteeing consistent thread precision, dimension uniformity, and compatibility with industrial components and Phillips tools.
  • Countersunk Phillips & Hollow Design: Countersunk head enables flush mounting, eliminating surface protrusions and equipment interference; Phillips drive ensures easy installation with common tools, while the hollow through-hole facilitates ventilation and vacuum pressure balance.
  • Precision Threaded Engagement: High-precision threading ensures tight workpiece connection, securing components firmly without blocking the through-hole vent function, meeting industrial assembly requirements.
  • Multi-Scenario Adaptability: Seamlessly fits vacuum equipment, exhaust systems, and precision instruments, bridging general and harsh environment applications with dual material options.
 

Specifications

 
  • Material: 304/316 Stainless Steel (Dual Anti-Corrosion Options)
  • Standard: GB819
  • Head Type: Countersunk Head
  • Drive Type: Phillips (Cross) Drive
  • Structure: Hollow Through-Hole (Vent/Exhaust/Vacuum)
  • Product Type: Precision Threaded Vent/Exhaust Screw
  • Application: Vacuum Equipment, Exhaust Systems, Precision Instruments, Industrial Ventilation Assemblies
  • Finish: Natural Stainless Steel (Anti-Rust & Wear-Resistant)
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