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  • Stainless Steel Flat Round Head Welding Screw Bolt with Three Spot
  • Stainless Steel Flat Round Head Welding Screw Bolt with Three Spot
  • Stainless Steel Flat Round Head Welding Screw Bolt with Three Spot
  • Stainless Steel Flat Round Head Welding Screw Bolt with Three Spot
Stainless Steel Flat Round Head Welding Screw Bolt with Three Spot

Stainless Steel Flat Round Head Welding Screw Bolt with Three Spot

  • >= 1000 Pieces
    $0.05

Customization:

Customized logo（Min.Order: 5000 pieces）
Customized packaging（Min.Order: 5000 pieces）
Graphic customization（Min.Order: 5000 pieces）
View product details

Stainless Steel Flat Round Head Welding Screw Bolt with Three Spot

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Durability & Corrosion Resistance: Constructed from 304 stainless steel, these screws offer exceptional longevity and resistance to rust, moisture, and harsh environmental conditions.
  • Versatile Securing Solution: Designed with a pan head (flat base and cylindrical top) for stable installation and easy gripping. The standard threaded shaft accommodates materials like metal, wood, and plastic, with thread sizes ranging from M3 to M8.

Key features

  • 1. Corrosion-Resistant 304 Stainless Steel

    • With 304 stainless steel construction, resist corrosion 3x longer than standard steel in harsh environments*

  • 2. Flat Round Head Design for Secure Installation

    • With a flat round head design, ensure secure seating and easy tool access for efficient installation, reducing assembly time by up to 20%*

  • 3. Versatile Metric/Inch Thread Sizes (M3–M8)

    • With thread sizes ranging from M3 to M8, accommodate diverse material thicknesses and project requirements, offering 5x more sizing options than basic screws.

  • 4. Harsh-Environment Durability

    • With marine-grade corrosion resistance and structural integrity, maintain performance in saltwater, high-moisture, or industrial settings, ideal for construction and outdoor applications.

  • 5. Compliance with Global Standards (DIN/ISO/ANSI)

    • With certification to DIN, ISO, and ANSI standards, ensure compatibility with international industry specifications for professional-grade reliability.

Product details

Stainless Steel Flat Round Head Welding Screw Bolt with Three Spot

The Stainless Steel Flat Round Head Welding Screw Bolt with Three Spot combines robust construction with versatile applications. Crafted from 304 stainless steel and standard steel, these screws feature a pan head design for stable driving and secure fastening. Available in finishes like passivated, black oxide, and zinc plated, they meet global standards (DIN, GB, JIS, ANSI, ISO) and support both metric and inch measurements.

Technical specifications

FeatureSpecificationBenefit
Material304 stainless steel, steelEnhanced corrosion resistance and durability
Finish OptionsPassivated, black oxide, zinc platedCustomized corrosion protection and aesthetics
Thread SizesM3, M4, M5, M6, M8Versatile for materials like wood, metal, and plastic
Standards ComplianceDIN, GB, JIS, ANSI, ISOGlobal compatibility for industrial use
Head TypeRound head (pan head)Stable grip and easy tool alignment

Customization guide

Adjust thread size (M3–M8) to match material thickness and load requirements. Opt for surface treatments like zinc plating for marine environments or black oxide for high-temperature applications. Customize lengths and thread patterns for specialized fastening needs.

Get inspired

With their corrosion-resistant 304 stainless steel and diverse finishes, these screws excel in demanding environments—from outdoor construction to industrial machinery. Their pan head design ensures clean finishes in furniture assembly, while metric/inch compatibility simplifies global projects.

Choose your model

ParameterBase Model (Steel)Advanced Model (304 Stainless)Pro Model (Premium Coated)
MaterialStandard steel304 stainless steel304 stainless + PTFE coating
Corrosion ResistanceBasic (salt spray: 24h)Enhanced (salt spray: 72h)Tripled (salt spray: 120h)*
Thread Strength4.8 grade8.8 grade10.9 grade
Finish OptionsZinc platedPassivated, black oxideCustom coatings (e.g., epoxy)

Supplier's note

  1. Technical Breakthroughs:

    • 304 Stainless Steel: Offers 20% higher corrosion resistance than standard steel.
    • Multi-Standard Compliance: Meets ISO, ANSI, and regional standards for global supply chains.
    • Modular Thread Sizes: Supports precise fastening in applications from electronics to heavy machinery.

  2. Version Selection Guide:

    • Base Model: Ideal for general assembly (e.g., furniture, light machinery) where cost-efficiency is prioritized.
    • Advanced Model: Suitable for corrosive environments (e.g., marine equipment, outdoor structures).
    • Pro Model: Designed for extreme conditions (e.g., chemical plants, aerospace) requiring ultra-high strength and chemical resistance.

With the Pro Model’s PTFE coating, you can achieve 50% lower friction during installation, reducing tool wear. Pair its 10.9-grade threads with 304 stainless steel for structural applications needing long-term load stability.

Frequently asked questions

  • Which stainless steel screw is best for outdoor construction projects?

  • Can these screws be used in marine environments?

  • What’s the difference between 304 stainless steel and regular steel screws?

  • Are these screws compatible with DIN or ANSI standards?

  • Can I customize finishes for these stainless steel screws?

  • Which thread size suits heavy-duty industrial applications?

  • How do I choose between metric and inch measurements?

  • What maintenance is required for stainless steel screws?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
MaterialHarsh environments (marine, industrial)Industry Standard: Carbon steel (ASTM A304)
Our Base: 304 stainless steel (ASTM A240)
Our Advanced: 316 stainless steel (ASTM A276)		▲ Advanced: 3x corrosion resistance in chloride environments
Base: Cost-effective durability		▲ Industry: Prone to rust in moisture-heavy settings
Advanced: Higher upfront cost
FinishCorrosion-sensitive applicationsIndustry: Uncoated or basic coatings
Our Base: Plain (no coating)
Our Advanced: Zinc-plated (ASTM B633) or passivated (ASTM A967)		▲ Advanced: 500+ hours salt-spray resistance (ASTM B117)
Base: Minimal maintenance required		▲ Industry: Short lifespan in corrosive areas
Advanced: Adds weight/cost
Thread TypeStructural assembly (construction, HVAC)Industry: Coarse thread (ISO 261)
Our Base: Standard thread (ISO 261)
Our Advanced: Fine thread (ISO 262) + triple-start helix		▲ Advanced: 40% faster installation + 20% higher tensile strength (ISO 898-1)
Base: Widely compatible		▲ Industry: Lower torque resistance in thin materials
Advanced: Requires precision tools
Standards ComplianceGlobal manufacturing (automotive, aerospace)Industry: Local region-specific (e.g., DIN, JIS)
Our Base: Meets DIN/ANSI/ISO
Our Advanced: Full DIN/GB/JIS/ANSI/ISO certification		▲ Advanced: Universal compatibility for global supply chains
Base: Meets 80% of international standards		▲ Industry: Limited cross-border applicability
Advanced: Higher certification costs
Surface TreatmentHigh-wear applications (machinery, tools)Industry: Untreated surfaces
Our Base: Black oxide (MIL-C-13924)
Our Advanced: Black oxide + PTFE coating (ASTM D3881)		▲ Advanced: 30% reduced friction during installation
Base: Enhanced lubricity without coating		▲ Industry: High wear in abrasive conditions
Advanced: Coating may degrade under extreme heat
Measurement SystemMixed-unit industries (construction, DIY)Industry: Metric-only or inch-only
Our Base: Dual metric/inch (ISO 286)
Our Advanced: Customizable thread sizes (M3–M8 + fractional inches)		▲ Advanced: 50% wider size range for niche projects
Base: Simplifies cross-unit projects		▲ Industry: Limited flexibility for hybrid systems
Advanced: Requires specialized inventory management

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