Core features of DIN251 Hexagon Socket Head with Serrated Flange Screws

1.Hex head: Efficient torque transmission, compatible with standard wrenches.
2.Precision threads: Tight engagement with nuts, reliable load-bearing.
3.Dual thread options: Full thread for thin workpieces, half thread for thick components.
4.High strength: Heat-treated material ensures shear/tensile resistance.
5.Wide compatibility: Matches standard nuts/washers, adaptable to general/heavy-duty scenarios

Product Parameter (Specification)

Standard	DIN,ASTM/ANSI, JIS, EN, ISO,AS	Material	Carbon steel, Stainless Steel, Aluminum,Brass
Surface Treatment	Zinc Plated, Hop Dip Galvanized(HDG) phosphorization, Black Oxide,Geomet,Dacroment,Nickel plated,Zinc-Nickel plated	Shank	Full thread, Half thread
Grade	4.8,5.8,6.8,8.8, 10.9, 12.9,B7,B7M,B8,B8M,304,316,A2,A4	Size	M4-M16
Unite	Piece,KGS,TON	Packing	Bulk cartons with pallet, small boxes in cartons with pallet

Product Application

DIN251 hexagon socket head screws with serrated flange are widely used in heavy Industry, mining, water treatment, healthcare, construction, general industry, Oil & Gas, heavy machinery, automobile and motorcycle.

DIN251 Hexagon Socket Head with Serrated Flange Screws Application Scenarios

Application Field	Specific Application Scenarios	Relevant Standards	Strength Grade (Material)	Core Reasons for Selection
Household Use	1. Furniture fixing: Connection of solid wood desk legs to tabletop, load-bearing fixing of wardrobe drawer slides 2. Home appliance installation: Fixing of refrigerator bottom adjustment feet, sealed connection of microwave oven inner tank frame	DIN 251, ISO 4762	Carbon Steel Grade 4.8, Stainless Steel A2-70	1. Serrated flange embeds in substrates (wood, plastic) for better anti-loosening than regular flanges, preventing loosening during furniture/appliance use;
Construction	1. Door & window hardware: Connection of aluminum alloy door/window hinges to frames, fixing of solid wood door lock panels 2. Outdoor facilities: Frame splicing of community outdoor leisure chairs, fixing of balcony glass guardrail posts	DIN 251, ISO 7380	Carbon Steel Grade 8.8, Stainless Steel A4-80	1. Grade 8.8 high strength adapts to door/window load-bearing; serrated flange increases friction to resist slight vibration in construction environments;
Industrial Equipment	1. Machine tool components: Fixing of CNC machine worktable positioning blocks, connection of machining center protective covers 2. Motor equipment: Sealed fixing of motor junction box covers, splicing of water pump body components	DIN 251, ISO 898-1	Carbon Steel Grade 10.9, Stainless Steel A2-70	1. Grade 10.9 high strength withstands high-frequency equipment vibration; serrated flange prevents loosening to avoid component displacement affecting equipment accuracy;
Transportation	1. Commercial vehicles: Fixing of truck compartment side panel hinges, connection of bus luggage rack brackets 2. Special vehicles: Fixing of engineering vehicle toolbox latches, connection of RV interior furniture (cabinets) to chassis	DIN 251, SAE J1219	Carbon Steel Grade 8.8, Stainless Steel A4-80	1. Serrated flange has strong anti-loosening effect, adapting to bumps during vehicle travel to prevent component detachment; 2. Flange has an integrated sealing surface, no extra washers needed, simplifying installation and improving vehicle maintenance efficiency.

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DIN251 Hexagon Socket Head with Serrated Flange Screws

1.Complies with DIN 251, ANSI B18.2.1M; serrated flange hex socket fasteners.

2.Material: Carbon steel (45#), stainless steel (304/316), alloy steel (42CrMo); strength grades 4.8–12.9.

3.Structure: Hex socket head + serrated flange (integrated) + full/half thread.

4.Surface treatments: Zinc plating, black oxide, passivation

5.Size M4–M16, length 6–50mm

Category: Flange Bolt

Description

Standard	DIN,ASTM/ANSI, JIS, EN, ISO,AS	Material	Carbon steel, Stainless Steel, Aluminum,Brass
Surface Treatment	Zinc Plated, Hop Dip Galvanized(HDG) phosphorization, Black Oxide,Geomet,Dacroment,Nickel plated,Zinc-Nickel plated	Shank	Full thread, Half thread
Grade	4.8,5.8,6.8,8.8, 10.9, 12.9,B7,B7M,B8,B8M,304,316,A2,A4	Size	M4-M16
Unite	Piece,KGS,TON	Packing	Bulk cartons with pallet, small boxes in cartons with pallet

Application Field	Specific Application Scenarios	Relevant Standards	Strength Grade (Material)	Core Reasons for Selection
Household Use	1. Furniture fixing: Connection of solid wood desk legs to tabletop, load-bearing fixing of wardrobe drawer slides 2. Home appliance installation: Fixing of refrigerator bottom adjustment feet, sealed connection of microwave oven inner tank frame	DIN 251, ISO 4762	Carbon Steel Grade 4.8, Stainless Steel A2-70	1. Serrated flange embeds in substrates (wood, plastic) for better anti-loosening than regular flanges, preventing loosening during furniture/appliance use;
Construction	1. Door & window hardware: Connection of aluminum alloy door/window hinges to frames, fixing of solid wood door lock panels 2. Outdoor facilities: Frame splicing of community outdoor leisure chairs, fixing of balcony glass guardrail posts	DIN 251, ISO 7380	Carbon Steel Grade 8.8, Stainless Steel A4-80	1. Grade 8.8 high strength adapts to door/window load-bearing; serrated flange increases friction to resist slight vibration in construction environments;
Industrial Equipment	1. Machine tool components: Fixing of CNC machine worktable positioning blocks, connection of machining center protective covers 2. Motor equipment: Sealed fixing of motor junction box covers, splicing of water pump body components	DIN 251, ISO 898-1	Carbon Steel Grade 10.9, Stainless Steel A2-70	1. Grade 10.9 high strength withstands high-frequency equipment vibration; serrated flange prevents loosening to avoid component displacement affecting equipment accuracy;
Transportation	1. Commercial vehicles: Fixing of truck compartment side panel hinges, connection of bus luggage rack brackets 2. Special vehicles: Fixing of engineering vehicle toolbox latches, connection of RV interior furniture (cabinets) to chassis	DIN 251, SAE J1219	Carbon Steel Grade 8.8, Stainless Steel A4-80	1. Serrated flange has strong anti-loosening effect, adapting to bumps during vehicle travel to prevent component detachment; 2. Flange has an integrated sealing surface, no extra washers needed, simplifying installation and improving vehicle maintenance efficiency.

DIN251 Hexagon Socket Head with Serrated Flange Screws

DIN251 Hexagon Socket Head with Serrated Flange Screws Application Scenarios

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