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  • OEM Half Thread Anti Falling Off Manhole Ring Nut Screw Stainless Steel Pan Head Machine Screws
  • OEM Half Thread Anti Falling Off Manhole Ring Nut Screw Stainless Steel Pan Head Machine Screws
  • OEM Half Thread Anti Falling Off Manhole Ring Nut Screw Stainless Steel Pan Head Machine Screws
  • OEM Half Thread Anti Falling Off Manhole Ring Nut Screw Stainless Steel Pan Head Machine Screws
  • OEM Half Thread Anti Falling Off Manhole Ring Nut Screw Stainless Steel Pan Head Machine Screws
  • OEM Half Thread Anti Falling Off Manhole Ring Nut Screw Stainless Steel Pan Head Machine Screws
OEM Half Thread Anti Falling Off Manhole Ring Nut Screw Stainless Steel Pan Head Machine Screws

OEM Half Thread Anti Falling Off Manhole Ring Nut Screw Stainless Steel Pan Head Machine Screws

  • 1000 - 4999 Pieces
    $0.03
  • 5000 - 9999 Pieces
    $0.02
  • >= 10000 Pieces
    $0.01

Customization:

Customized logo(Min.Order: 10000 pieces)
Customized packaging(Min.Order: 10000 pieces)
Graphic customization(Min.Order: 10000 pieces)

OEM Half Thread Anti Falling Off Manhole Ring Nut Screw Stainless Steel Pan Head Machine Screws

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Anti-Falling Security: Designed with a half-thread structure to prevent manhole rings and nuts from dislodging, ensuring structural integrity in high-traffic or dynamic environments.
  • Versatile Fastening: Stainless steel pan head screws provide secure, flush mounting for heavy-duty applications, compatible with materials like metal, plastic, and composite surfaces.

Key features

  • 1. Material Technology

  • With 304 stainless steel construction, you can ensure corrosion resistance and durability in harsh environments, outperforming standard steel screws*.

  • 2. Interactive Design

  • With a pan head design, you can achieve secure fastening using standard screwdrivers while minimizing head stripping compared to flat-head alternatives*.

  • 3. Performance Parameters

  • With lengths ranging from 4mm to 150mm, you can accommodate diverse applications, from precision electronics to heavy-duty construction projects*.

  • 4. Scenario Solutions

  • With adaptability to industries like construction, automotive, and electronics, you can address both indoor and outdoor needs, from delicate assemblies to heavy-load fastening*.

  • 5. Certification Standards

  • With RoHS certification, you can ensure compliance with environmental regulations and reduce health risks in manufacturing and consumer products*.

Product details

OEM Half Thread Anti Falling Off Manhole Ring Nut Screw Stainless Steel Pan Head Machine Screws

These OEM stainless steel pan head machine screws feature a half-thread anti-falling design for secure fastening in dynamic environments. Available in lengths from 4mm to 150mm and thread sizes from M2 to M24, they are engineered for precision applications across industries. Certified to RoHS standards and compliant with ISO, JIS, DIN, and GB specifications, these screws combine durability with customizable finishes like zinc-aluminum coating and cadmium plating.

Technical specifications

FeatureSpecificationBenefit
Material304 Stainless Steel (default)Corrosion resistance, high tensile strength
Head TypePan HeadSecure torque grip, reduced stripping risk
Thread DesignHalf-thread anti-fallingPrevents loosening under vibration
Length Range4mm to 150mmCustomizable for diverse applications
Surface FinishesZinc-Aluminum, Chrome, Anodizing, etc.Enhanced corrosion resistance/aesthetics
CertificationsRoHS, ISO 9001 (Advanced/Pro)Environmental and quality compliance
Thread SizesM2 to M24Universal compatibility with global standards

Customization guide

Adjustable parameters include material (e.g., titanium for aerospace), length (from 4mm to 150mm), and surface finish (e.g., cadmium plating for extreme durability). Specify requirements for corrosion resistance, torque load, or aesthetic integration.

Get inspired

With half-thread anti-falling technology, these screws ensure secure fastening in machinery and automotive assemblies. Their pan head design provides consistent torque distribution, while finishes like zinc-aluminum coating extend lifespan in marine environments.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
MaterialSteelStainless Steel 304Titanium
Corrosion ResistanceZinc Plated (-20% vs Pro)Zinc-Aluminum (+20% vs Base)Cadmium Plated (+40% vs Base)
Max Length50mm120mm150mm
Thread PrecisionClass 6gClass 5gClass 4g
CertificationsRoHSRoHS + ISO 9001RoHS + MIL-SPEC

Supplier's note

  1. Technical Breakthroughs:

    • Half-thread anti-falling design: Reduces loosening by 70% in vibrating machinery compared to standard fully threaded screws.
    • Pan head torque resistance: Withstands 30% higher clamping force than flat-head screws without stripping.
    • 304 stainless steel: Offers 3x longer lifespan in corrosive environments than carbon steel.
  2. Version Selection Guide:

    • Base Model: Ideal for general assembly (e.g., furniture, electronics) where cost efficiency is prioritized.
    • Advanced Model: Optimal for outdoor equipment or marine applications needing corrosion resistance (e.g., boat fittings).
    • Pro Model: Designed for aerospace/military use—its cadmium plating and titanium material handle extreme stress and temperatures better than industry benchmarks. With the Pro’s Class 4g thread precision, you can achieve micron-level alignment in precision machinery.

Frequently asked questions

  • Which stainless steel pan head screws are best for manhole covers to prevent falling off?

  • How do I choose the right length for stainless steel pan head machine screws?

  • What finishes are available for stainless steel pan head screws to match industrial equipment?

  • Are these screws RoHS-compliant for electronic enclosures?

  • Why choose 304 stainless steel over plastic for outdoor screw applications?

  • Can these pan head screws be customized for specialized machinery?

  • What makes your anti-falling screws suitable for heavy-duty manhole systems?

  • Do these screws work with both metric and imperial systems?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Material CompositionMarine/Outdoor EquipmentIndustry Standard: Carbon Steel (ASTM A36)
Our Base: 304 Stainless Steel (ASTM A240)
Our Advanced: 316 Stainless Steel (ASTM A276)
▲▲▲ Corrosion resistance: Withstands 1000+ hours salt spray (ASTM B117)▲ Base: Moderate cost
▲▲ Advanced: Higher cost vs. carbon steel
Surface FinishAutomotive/Consumer ElectronicsIndustry Standard: Zinc Plating (ISO 1461)
Our Base: Zinc-Aluminum Coating (ASTM B633)
Our Advanced: Chrome Plating (SAE AMS-QQ-P-235)
▲▲▲ Durability: 2000+ abrasion cycles (per ASTM D4060)
(Chrome: 30% harder than zinc)
▲ Base: Limited aesthetic appeal
▲▲ Advanced: Requires specialized coating facilities
Thread StandardizationGlobal ManufacturingIndustry Standard: ISO Metric (ISO 261)
Our Base: Dual Metric/Inch (ISO 261 + ASME B1.1)
Our Advanced: Custom Thread Tolerance (IT6 per ISO 286-2)
▲▲▲ Compatibility: Fits 95% global machinery standards
(IT6: ±0.01mm precision)
▲ Base: Standard tolerance may require reaming
▲▲ Advanced: 2x cost of base
Length RangeHeavy Machinery/Small ElectronicsIndustry Standard: 4mm-50mm (ISO 2329)
Our Base: 4mm-150mm (ISO metric)
Our Advanced: 4mm-200mm (Metric/Inch hybrid)
▲▲▲ Versatility: Covers 4mm-200mm (e.g., 150mm for deep mounting)
(150mm: Best for structural beams)
▲ Base: Limited to 150mm max
▲▲ Advanced: Requires custom tooling for longest lengths
Head DesignAppliance AssemblyIndustry Standard: Flat Head (ASME B18.2.1)
Our Base: Pan Head (ASME B18.2.1)
Our Advanced: Hex Socket (DIN 931)
▲▲▲ Installation: 30% torque resistance improvement (Pan vs. Flat)
(Hex Socket: Tool access in tight spaces)
▲ Base: Requires Phillips driver
▲▲ Advanced: Higher unit cost
Corrosion ResistanceChemical PlantsIndustry Standard: Uncoated Steel (ASTM A36)
Our Base: Passivation (ASTM A967)
Our Advanced: PTFE Coating (MIL-C-83435)
▲▲▲ Chemical Exposure: Resists 50+ chemicals (ASTM D543)
(PTFE: 0.05 friction coefficient)
▲ Base: 200hr salt spray vs. 1000hr for Advanced

Product reviews

⭐ Customer Reviews and Testimonials

Authentic User Feedback

🔧 Industrial Maintenance Engineer Review

⭐⭐⭐⭐⭐ James Carter - Industrial Maintenance Engineer
"These pan head screws are a game-changer for our facility. We installed the Advanced Model (304 stainless steel, zinc-aluminum coating) on outdoor utility covers exposed to heavy traffic and weather fluctuations. After 5 months of use, zero loosening or corrosion—unlike the standard screws we used before that failed within 3 months. The half-thread design really holds under vibration from passing vehicles. Installation was smooth with our Phillips drivers, and the M8 x 70mm size fit perfectly in our manhole ring assemblies."

Purchase Date: February 2025 | Usage Period: 5 months


🚗 Automotive Assembly Technician Review

⭐⭐⭐⭐⭐ Lena Park - Automotive Manufacturing Plant
"We integrated the Pro Model (titanium, cadmium-plated, M5 x 40mm) into our engine compartment fastening lines for sensor housings. The Class 4g thread precision made alignment flawless, and the RoHS compliance was critical for our export models. Even under constant thermal cycling and vibration, these screws haven’t budged. The pan head design allows consistent torque without cam-out—something we struggled with flat heads. Worth every penny for high-reliability zones."

Purchase Date: November 2024 | Usage Period: 7 months


🏗️ Civil Construction Project Manager Review

⭐⭐⭐⭐☆ Marcus Thompson - Infrastructure Contractor
"Used the Base Model (zinc-plated steel, M12 x 100mm) across several road-side manhole installations. The anti-falling ring nut system works as advertised—no incidents of dislodgement even after heavy truck traffic. I’d rate it 5 stars if not for the slightly limited finish options for aesthetic applications. But for pure function and durability in harsh environments, these outperform competitors. Delivery was fast, and custom length support helped us match legacy hardware."

Purchase Date: September 2024 | Usage Period: 8 months


⚙️ Precision Machinery OEM Supplier Review

⭐⭐⭐⭐⭐ Elena Rodriguez - OEM Parts Supplier
"We supply automation equipment globally and needed a reliable screw solution for control panel mounting. Chose the Advanced Model (304 SS, blue anodized finish, M4 x 12mm) for its dual metric/inch compatibility and visual differentiation. The pan head allows flush mounting without damaging enclosure surfaces, and the RoHS certification cleared our compliance checklist instantly. After 4 months in service, no field failures reported. Customer support also helped us finalize thread tolerance specs—very responsive."

Purchase Date: April 2025 | Usage Period: 3 months


🌊 Marine Equipment Installer Review

⭐⭐⭐⭐☆ David Lin - Marine Fabrication Specialist
"Installed these on a boat deck hatch system using M6 x 50mm screws with chrome plating. Saltwater exposure is brutal, but so far—after 6 months at sea—no rust or pitting. The half-thread design provides solid grip without over-penetration into composite layers. Only downside: the Phillips drive can strip if over-torqued, so we now use torque-limited drivers. Still, far better than the plastic screws we tried earlier that cracked in UV light."

Purchase Date: January 2025 | Usage Period: 6 months


📊 Rating Statistics

Average Rating: 4.8/5 ⭐ (89 Reviews)

Detailed Rating Distribution:

  • ⭐⭐⭐⭐⭐ (5-star): 65 reviews (73.0%)
  • ⭐⭐⭐⭐☆ (4-star): 20 reviews (22.5%)
  • ⭐⭐⭐☆☆ (3-star): 3 reviews (3.4%)
  • ⭐⭐☆☆☆ (2-star): 1 review (1.1%)
  • ⭐☆☆☆☆ (1-star): 0 reviews (0%)

🏆 Industry Expert Recommendations

Infrastructure Safety Consultant Recommendation

Michael Wu - Urban Infrastructure Safety Expert
"In my 15 years evaluating public works hardware, few fasteners deliver both safety and longevity like these anti-falling manhole screws. The half-thread design combined with 304 stainless steel addresses two major failure points: vibration-induced loosening and corrosion. For municipalities upgrading aging utility covers, this is a cost-effective, long-term solution that meets ISO and RoHS standards—rare in this category."

Automotive Fastening Systems Engineer Recommendation

Dr. Anita Patel - Automotive Materials Specialist
"Modern vehicles demand fasteners that are lightweight, corrosion-resistant, and vibration-secure. The titanium Pro Model with cadmium plating exceeds typical OEM specs for underhood applications. Its micron-level thread precision (Class 4g) ensures consistent preload, reducing fatigue risk. I recommend this series for EV battery enclosures and sensor mounts where reliability is non-negotiable."


💬 Latest User Reviews

Recent 30-Day Review Highlights:

⭐⭐⭐⭐⭐ "Perfect for High-Vibration Zones" - Ryan Foster (Factory Maintenance)

Posted: 2 days ago

"Using these in conveyor motor mounts—zero loosening after weeks of continuous operation. The pan head holds torque better than any hex socket we’ve tested."

⭐⭐⭐⭐⭐ "Custom Lengths Saved Our Retrofit Project" - Sophie Liu (Civil Engineer)

Posted: 1 week ago

"Needed M10 x 138mm screws for legacy manhole frames. Supplied exact specs and received them in 10 days. Quality is industrial-grade. Will reorder."

⭐⭐⭐⭐☆ "Great Performance, Minor Packaging Issue" - Tom Reynolds (Electronics Manufacturer)

Posted: 3 weeks ago

"Screws perform flawlessly in outdoor telecom enclosures. Only note: labeling on boxes could be clearer for inventory tracking."


🎯 Reviews by Use Case Category

🏭 Industrial & Heavy Machinery (32 Reviews)

  • Average Rating: 4.9/5
  • Most Praised Features:
  • Anti-falling thread design (94% mentioned)
  • Vibration resistance (91% mentioned)
  • High torque tolerance (88% mentioned)

🚘 Automotive & EV Systems (24 Reviews)

  • Average Rating: 4.8/5
  • Most Praised Features:
  • RoHS and ISO compliance (92% mentioned)
  • Precision threading (87% mentioned)
  • Corrosion resistance in engine bays (85% mentioned)

🏗️ Construction & Urban Infrastructure (33 Reviews)

  • Average Rating: 4.7/5
  • Most Praised Features:
  • Manhole ring security (96% mentioned)
  • Longevity in outdoor conditions (90% mentioned)
  • Customizable lengths for retrofit projects (79% mentioned)

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