Waterproof O-Ring Sealing Screws M2-M6 Custom Stainless Steel Fasteners

Complete Product Specifications

• ►Size Range: M2, M2.5, M3, M4, M5, M6 standard metric sizes, custom non-standard thread diameters available
• ►Head Styles: Pan head, countersunk flat head, socket cap head, truss head, wafer head
• ►Drive Types: Phillips cross, Torx star, hex socket, tamper-proof security drive
• ►O-Ring Materials: Food-grade silicone, NBR nitrile rubber, Viton fluororubber, EPDM
• ►Base Materials: 304 stainless steel, 316 stainless steel, carbon steel, alloy steel
• ►Surface Treatments: Natural passivation, zinc plating, black oxide, nickel plating, PVD coating
• ►Sealing Performance: Up to IP67/IP68 protection level, working temperature range from -40℃ to 120℃, withstand 1.5MPa water pressure without leakage

Material & Quality Assurance

All our sealing screws are produced with raw materials from large domestic steel mills, with traceable material batches and full spectral inspection reports. The O-rings are sourced from professional sealing material suppliers, with aging resistance and compression set tests passed before assembly.

• ✓Salt spray resistance: 48-1000 hours according to surface treatment
• ✓100% full inspection on thread dimension, O-ring fitting and appearance before shipment
• ✓Full test reports including salt spray test, torque test, pull-out test and sealing performance test available upon request

Application Scenarios

Our sealing screws are widely applied in industries with waterproof, dustproof and airtight requirements:

• ■New energy: Battery packs, charging piles, photovoltaic inverters
• ■Outdoor electronics: LED lighting, smart meters, security equipment
• ■Medical devices: Sterilizable equipment, diagnostic instruments
• ■Industrial automation: Hydraulic components, pneumatic systems, sensor housings
• ■Automotive: Interior and exterior electronic parts, new energy vehicle components

Factory & Service Advantages

• ★30+ years of fastener manufacturing experience, dual production bases in Dongguan and Lechang with 20000+ square meters factory area
• ★Monthly production capacity of 1000 tons, equipped with multi-station cold heading machines, CNC lathes, automatic heat treatment lines and full-set testing equipment
• ★Certified with IATF16949, ISO9001 and ISO14001, all products comply with RoHS and REACH standards
• ★Full OEM/ODM support: Custom drawings, samples, special materials, unique surface treatments and custom packaging
• ★MOQ flexible: 1000pcs for standard models, small batch trial orders acceptable for custom items
• ★24-hour online technical and quotation support, professional engineering team for product structure optimization and material selection advice

YH Fastener is a professional sealing screw manufacturer and supplier based in China, specializing in high-performance waterproof sealing fasteners for over 30 years. Our self-sealing machine screws integrate precision machined metal bodies with high-elasticity O-rings, achieving reliable static sealing under high pressure, vibration and extreme temperature conditions. We offer full size options from M2 to M6, with multiple head styles and drive types to match diverse assembly requirements, widely used in outdoor electronics, new energy equipment, medical devices and industrial automation fields.