Din 6921
|
Parameter |
Specification & Range |
Test Standard |
|
Standards |
DIN 6921 (Serrated) · ISO 4162 (Flat) · ANSI B18.2.1 (Hex Flange) · JIS B1189 |
ISO 898-1 |
|
Flange Type |
Serrated · Flat · O-ring Groove |
DIN 6921 Sec.4.2 |
|
Thread Specification |
M6-M36 · UNC/UNF #4-1½" · Pitch: Standard/Fine (e.g. M12x1.25) |
ISO 261/262 |
|
Flange Diameter (D) |
1.7×d to 2.5×d (d=thread diameter) · e.g. M10: Φ17-25mm |
DIN 6921 Table 1 |
|
Serration Angle |
30° (DIN) · 45° (ANSI) |
DIN 6921 Fig.1 |
|
Tooth Depth |
0.4-0.8mm (flange diameter dependent) |
ISO 16047 |
|
Material Grade |
Carbon Steel: 8.8 (800MPa) · 10.9 (1040MPa) · Stainless: A2-70(700MPa)/A4-80(800MPa) |
ISO 898-1/3506-1 |
|
Surface Treatment |
Electro-Zinc |
ASTM B633 |
|
Torque Value (Nm) |
M10 Grade 10.9: Clamp Force 64kN · Torque 85Nm (lubricated) |
VDI 2230 |
|
Operating Temp. |
Carbon Steel: -50℃~+250℃ · Stainless: -200℃~+400℃ |
ASTM A193 |
Flange bolts (also known as frame bolts or flange head bolts) are characterized by an integral, circular flange (washer-like bearing surface) directly beneath the bolt head. This flange distributes clamping force over a wider area than a standard bolt head, reducing surface pressure, preventing pull-through in softer materials, and often eliminating the need for a separate washer. This makes them suitable for a wide range of applications:
Piping Systems & Pressure Vessels:
Flanged pipe connections (ASME B16.5, B16.47, etc.) for oil & gas, chemical processing, water treatment, power generation (steam, water lines).
Pressure vessel manways, nozzles, and cover plates.
Pump and valve connections.
HVAC systems (high-pressure ducting, chillers).
Automotive & Transportation:
Engine assemblies (cylinder heads, manifolds - though often studs/nuts, bolts are used).
Transmission and drivetrain components.
Suspension systems (bushings, brackets).
Chassis and frame assembly.
Exhaust system components (manifolds, flanges).
Wheel mounting (lug bolts often have a flange).
Machinery & Industrial Equipment:
Assembly of heavy machinery frames, housings, and guards.
Mounting motors, gearboxes, and pumps.
Securing covers, access panels, and inspection ports on equipment.
Material handling equipment (conveyors, cranes).
SERIVCE
Reliable After-Sales Support:Swift resolution for all technical issues & product inquiries. / 20+ Years of Global Export Expertise:Proven experience in international logistics & compliance.
Detailed Product Specifications On Request:Customizable spec sheets for informed purchasing decisions. / Instant Quote Response:Submit inquiries for prompt pricing & solution proposals.
Certified Export Documentation & Timely Shipment:Hassle-free logistics with professionally prepared export papers.
Custom Packaging with Pre-Shipment Visual Verification:Branded/secure packaging with photo confirmation before dispatch.
Premium Quality at Competitive Pricing: Industry-leading products optimized for value & performance.
