All categories
Featured selections
Trade Assurance
Buyer Central
Help Center
Get the app
Become a supplier
Alibaba
Tools & Hardware
Fasteners
Screws
Screws
  • UNC Round Head Hex Hexagon Socket Machine Screws 304 Stainless Steel Pan Head Allen Bolts 2#-56 4#-40 6#-32 8#-32 10#-24 10#-32
  • UNC Round Head Hex Hexagon Socket Machine Screws 304 Stainless Steel Pan Head Allen Bolts 2#-56 4#-40 6#-32 8#-32 10#-24 10#-32
  • UNC Round Head Hex Hexagon Socket Machine Screws 304 Stainless Steel Pan Head Allen Bolts 2#-56 4#-40 6#-32 8#-32 10#-24 10#-32
  • UNC Round Head Hex Hexagon Socket Machine Screws 304 Stainless Steel Pan Head Allen Bolts 2#-56 4#-40 6#-32 8#-32 10#-24 10#-32
  • UNC Round Head Hex Hexagon Socket Machine Screws 304 Stainless Steel Pan Head Allen Bolts 2#-56 4#-40 6#-32 8#-32 10#-24 10#-32
  • UNC Round Head Hex Hexagon Socket Machine Screws 304 Stainless Steel Pan Head Allen Bolts 2#-56 4#-40 6#-32 8#-32 10#-24 10#-32
UNC Round Head Hex Hexagon Socket Machine Screws 304 Stainless Steel Pan Head Allen Bolts 2#-56 4#-40 6#-32 8#-32 10#-24 10#-32

UNC Round Head Hex Hexagon Socket Machine Screws 304 Stainless Steel Pan Head Allen Bolts 2#-56 4#-40 6#-32 8#-32 10#-24 10#-32

  • 100 - 4999 Pieces
    $0.10
  • 5000 - 9999 Pieces
    $0.08
  • >= 10000 Pieces
    $0.05

Customization:

Graphic Customization（Min.Order: 1000 pieces）
Customized Packaging（Min.Order: 1000 pieces）
Customized Logo（Min.Order: 1000 pieces）
View product details

UNC Round Head Hex Hexagon Socket Machine Screws 304 Stainless Steel Pan Head Allen Bolts 2#-56 4#-40 6#-32 8#-32 10#-24 10#-32

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Low-Profile Secure Fastening: Hexagon socket head design ensures flush mounting for sleek finishes in applications requiring minimal head exposure.
  • Corrosion Resistance: 304 stainless steel construction withstands moisture, chemicals, and harsh environments, ideal for long-term durability.

Key features

  • 1. Material Technology

    • With 304 stainless steel construction, you can ensure corrosion resistance in harsh environments like marine or industrial settings. * ~30% more corrosion-resistant than standard steel screws*

  • 2. Interactive Design

    • With a hexagonal socket head design, you can achieve precise tightening using a hex key, offering a low-profile finish for flush applications. * Superior to slotted heads in torque retention*

  • 3. Performance Parameters

    • With high tensile strength from 304 stainless steel, you can handle heavy-duty applications requiring durability. * Outperforms standard steel screws in fatigue resistance*

  • 4. Scenario Solutions

    • With corrosion-resistant and low-profile features, you can deploy these screws in automotive assemblies or industrial machinery exposed to moisture/chemicals. * Versatile for both commercial and industrial use compared to non-stainless alternatives*

  • 5. Certification Standards

    • With IEC 62321 compliance, you can meet strict regulations on hazardous substances. * Ensures safety and sustainability over non-certified fasteners*

Product details

UNC Round Head Hex Hexagon Socket Machine Screws 304 Stainless Steel Pan Head Allen Bolts 2#-56 4#-40 6#-32 8#-32 10#-24 10#-32

UNC Round Head Hex Hexagon Socket Machine Screws are precision-engineered 304 stainless steel fasteners designed for versatile applications requiring corrosion resistance and low-profile installation. Certified to IEC62321 standards, these Allen bolts feature hexagonal socket heads for tool-friendly tightening and are available in thread sizes 2#-56, 4#-40, 6#-32, 8#-32, 10#-24, and 10#-32.

Technical specifications

FeatureSpecificationApplication Scenario
Material304 Stainless SteelHarsh environments (moisture, chemicals)
CertificationIEC62321 (RoHS compliance)Regulated industries (construction, automotive)
Head TypeButton, Round, PanCustomized flush or raised mounting
Thread Sizes2#-56, 4#-40, 6#-32, 8#-32, 10#-24/32Precision fitment in machinery/panels
Thread TypeStandard ThreadCompatibility with common tools
Measurement SystemInch-BasedUS/Imperial industry standards
Surface TreatmentPlain FinishUncoated, standard aesthetic finish
Socket DesignHexagonal Socket (Allen)Secure torque application with hex keys

Customization guide

Adjustable parameters include length, thread pitch, and head style to meet specific torque requirements, material thickness, or installation space constraints.

Get inspired

With their low-profile pan head and corrosion-resistant 304 stainless steel, these screws excel in automotive panels, marine equipment, or industrial machinery where durability and aesthetics matter.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Corrosion ResistanceStandard+15% Enhanced+150% Triple Industry
Tensile Strength50 ksi60 ksi (+20%)70 ksi (+40%)
Thread PrecisionClass 6gClass 5g (+16.7%)Class 4g (Premium)

Supplier's note

  1. Technical Breakthroughs:

    • Pro Model’s triple corrosion resistance (vs. industry standard) enables safe use in saltwater or chemical exposure.
    • Advanced Model’s 60 ksi tensile strength outperforms competitors by 20%, ideal for heavy-duty machinery.
    • Precision threads (Class 4g) ensure 20% faster installation and reduced slippage.

  2. Optimal Version Selection:

    • Base Model: Suitable for general assembly (e.g., household appliances) where basic durability suffices.
    • Advanced Model: Best for industrial equipment (e.g., automotive engines) needing enhanced strength and precision.
    • Pro Model: Recommended for extreme environments (e.g., offshore platforms) requiring unmatched corrosion resistance and structural integrity.

With the Pro model’s triple corrosion resistance, you can ensure longevity in marine environments. The Advanced model’s precision threads enable 20% faster assembly than traditional screws. Choose the Base model for cost-effective solutions in low-stress applications.

Frequently asked questions

  • Which UNC screw size is best for lightweight projects like furniture assembly?

  • How do I clean stainless steel UNC screws to prevent corrosion?

  • Why choose 304 stainless steel UNC screws over regular steel screws?

  • Can I order custom thread sizes for UNC screws beyond 2#-56, 4#-40, or 6#-32?

  • Are these UNC screws RoHS compliant and IEC62321 certified?

  • Are UNC pan head screws suitable for automotive parts assembly?

  • Which head type (button, round, pan) is best for flush surfaces like panel mounting?

  • Do UNC screws with standard threads work with common tools like Allen wrenches?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Material CompositionMarine/ConstructionIndustry Standard: Carbon Steel (ASTM A307)
Our Base: 304 Stainless Steel (ASTM A276)
Our Advanced: 304SS + Passivation (ASTM A967)		▲ Base: 200% higher corrosion resistance vs carbon steel (ASTM B117 salt spray test).
▲ Advanced: 30% smoother surface for extreme environments.		Higher cost compared to carbon steel.
Thread PrecisionHigh-Tolerance MachineryIndustry Standard: Class 3 (ISO 965-1)
Our Base: Class 2 (ISO 965-1)
Our Advanced: Class 1 (ISO 965-1)		▲ Base: 40% tighter fit vs industry standard.
▲ Advanced: 60% less slippage in high-vibration settings.		Requires specialized tools for installation.
Surface FinishElectronics/Consumer GoodsIndustry Standard: Matte Finish (Ra 1.6 µm)
Our Base: Plain Finish (Ra 0.8 µm)
Our Advanced: Polished Finish (Ra 0.4 µm)		▲ Base: 50% smoother than standard, reducing friction.
▲ Advanced: 75% lower wear in sliding applications.		Polished finish may attract contaminants in dusty environments.
Corrosion ResistanceChemical PlantsIndustry Standard: 48hr neutral salt spray (ASTM B117)
Our Base: 96hr neutral salt spray
Our Advanced: 240hr neutral salt spray		▲ Base: Doubles industry-standard durability.
▲ Advanced: 5x longer lifespan in corrosive environments.		Not suitable for seawater immersion without additional coatings.
Thread Size VarietyCustom ManufacturingIndustry Standard: 3–5 sizes available
Our Base: 6 sizes (2#,4#,6#,8#,10#)
Our Advanced: 10+ sizes (incl. non-standard pitches)		▲ Base: 2x more options than competitors.
▲ Advanced: Full customization for niche applications.		Limited stock for non-standard sizes may delay delivery.
Compliance CertificationsRegulatory-Heavy IndustriesIndustry Standard: No specific certification
Our Base: IEC 62321 (RoHS compliant)
Our Advanced: IEC 62321 + ISO 14001 (Environmental Management)		▲ Base: Eliminates 10+ hazardous substances (e.g., lead, cadmium).
▲ Advanced: 100% recyclable material traceability.		Adds 15% to production cost for certifications.

Related searches

hospital cleaning mop trolleyleather chair dining chair leather leatherholographic glitter boxcat hair removerBussmann fusepermanent black hair shampooWireless CarPlay Mirror Boxbest kitchen baking tools household minibusiness skeleton automatic watchsteel wire rod rolling machineJesus Christ crucifixsuntan fishnet stockingsWillett 430 keyboard membranecar jump startercustom college student backpack

The Product Description is generated by third-party, and Alibaba.com is not liable for any risks related to inaccuracies or the infringement of third-party rights.

The information in this Product Description may differ from the details on the product listing page on Alibaba.com. Additionally, the contents may not be updated in real-time with the product listing page on Alibaba.com, and there may be delays in reflecting the most updated information. The description on product listing page takes precedence. You shall not rely on this Product Description in making transaction decisions.

The comparison data is based on manufacturer information and industry standards. Actual results may vary depending on individual use cases. It is advisable to verify details with the supplier for the most accurate information.