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DIN251 Hexagon Socket Head with Serrated Flange Screws
DIN251 Hexagon Socket Head with Serrated Flange Screws
Torx Drive Hex Head Flange Bolts
Stainless steel Torx drive hex head flange bolts for mechanical assembly.
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Torx Drive Hex Head Flange Bolts
Stainless steel Torx drive hex head flange bolts for mechanical assembly.

Torx Drive Hex Head Flange Bolts

  1. Complies with international standards such as ISO 14583, DIN 6921 (flange bolt base) and ISO 10664 (Torx drive)
  2. Integrating Torx drive, hex head, and flange design
  3. Belongs to high-precision fasteners, with a one-piece structure of hex head, flange (integrated washer), and Torx drive socket
  4. Common materials include carbon steel (e.g., 45#), stainless steel (e.g., 304, 316), and alloy steel (e.g., 42CrMo)
  5. Strength grades range from 4.8 to 12.9, with high-strength variants undergoing quenching and tempering heat treatment
  6. Surface treatments include zinc plating, nickel plating, black oxide, or hot-dip galvanizing to enhance corrosion resistance
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Description

Core Features of Torx Drive Hex Head Flange Bolts

  1. Torx drive design: Multi-point contact between the drive socket and tool reduces stress concentration, prevents slippage (cam-out), and enables higher torque transmission compared to standard hex drives
  2. Integrated hex head: Facilitates auxiliary tightening with wrenches, suitable for scenarios requiring dual-drive options (Torx tool for precision, hex wrench for backup)
  3. One-piece flange: Acts as an integrated washer to distribute clamping force evenly, protect workpiece surfaces from damage, and enhance anti-loosening performance without additional washers
  4. Flange surface optimization: Some variants feature serrated flange faces to increase friction, further improving stability in high-vibration environments
  5. Excellent mechanical properties: High load-bearing capacity, shear strength, and wear resistance, ensuring reliable long-term connections

 

Product Parameter (Specification)

StandardDIN,ASTM/ANSI, JIS, EN, ISO,ASMaterialCarbon steel, Stainless Steel, Aluminum,Brass
Surface TreatmentZinc Plated, Hop Dip Galvanized(HDG) phosphorization,

Black Oxide,Geomet,Dacroment,Nickel plated,Zinc-Nickel plated

ShankFull thread, Half thread
Grade4.8,5.8,6.8,8.8, 10.9, 12.9,B7,B7M,B8,B8M,304,316,A2,A4SizeM3-M64
UnitePiece,KGS,TONPackingBulk cartons with pallet, small boxes in cartons with pallet

 

Product Application

Torx drive hex head flange bolts are widely used in heavy Industry, mining, water treatment, healthcare, construction, general industry, Oil & Gas, heavy machinery, automobile, motorcycle and solar PV system.

Torx Drive Hex Head Flange Bolts Application Scenarios

Application FieldSpecific Application ScenariosInternational StandardsStrength Grade (Material)Core Reasons for Selection
Household Use1. Furniture assembly: Fixing of solid wood wardrobe hinges, load-bearing connection of drawer slides

2. Home appliance installation: Anti-vibration fixing of washing machine bases, sealed connection of oven inner tank frames

ISO 14583, ISO 7380Carbon Steel Grade 4.8, Stainless Steel A2-701. Torx drive prevents slipping, avoiding bolt head damage during manual DIY installation;

 

2. Integrated flange acts as a washer, eliminating the need for extra gaskets and enhancing anti-loosening for long-term appliance vibration.

Construction1. Curtain walls & doors/windows: Fixing of aluminum alloy door/window frames to wall connectors, sealed connection of glass curtain wall press strips

2. Outdoor facilities: Connection of community guardrail posts and crossbars, load-bearing bracket fixing of balcony clothes dryers

ISO 14583, DIN 6921Carbon Steel Grade 8.8, Stainless Steel A4-801. Grade 8.8 high strength bears door/window weight and wind load; the flange increases contact area to prevent wall substrate deformation;

 

2. A4-80 stainless steel resists outdoor rain and salt corrosion, suitable for damp areas like balconies and exterior walls.

Industrial Equipment1. Machine tool components: Fixing of CNC machine guide sliders, connection of machining center spindle guards

2. Motor equipment: Sealed fixing of motor end caps, connection of water pump impeller assemblies

ISO 14583, ISO 898-1Carbon Steel Grade 10.9, Stainless Steel A2-701. Grade 10.9 high strength withstands high-frequency equipment vibration, preventing component displacement from loose bolts;

 

2. Torx drive enables precise torque control, meeting industrial equipment’s high installation accuracy requirements.

Electronic & Electrical1. Communication devices: Fixing of router antenna bases, load-bearing connection of switch cabinetsISO 14583 , IEC 60950Stainless Steel A2-70, Carbon Steel Grade 5.81. Small sizes fit narrow spaces in electronic devices; the flange prevents bolts from sinking into plastic enclosures;

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