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Allen Head Bolt

8.8 Grade Zinc Plated Industrial DIN251 Hexagon Socket Flange Head Allen Screw

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Plastic Bolt

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8.8 Grade Zinc Plated Industrial DIN251 Hexagon Socket Flange Head Allen Screw

Brand Name:	YB
Model Number:	DIN251
MOQ:	10000
Price:	Negontiation
Packaging Details:	5000-10000/box
Payment Terms:	T/T

Detail Information

Product Description

Detail Information

Place of Origin:

ZheJiang,China

Certification:

ISO9001

Trademark:

YONGBIAO

Country Of Origin:

China

Drivetype:

Standardscompliance:

DIN251

Screw Type:

Allen Bolt

Thread Nominal:

M3-M10

Supply Ability:

5000Tons/year

Highlight:

8.8 grade DIN251 Allen screw

zinc plated flange head bolt

industrial hexagon socket bolt

Product Description

8.8 Grade Zinc Plated Industrial DIN251 Hexagon Socket Flange Head Allen Screw

Product Overview

DIN 251 hexagon socket flange head machine screws are German DIN standard specialized fasteners engineered for industrial mechanical fastening. Renowned for their integrated anti-loosening structure, high connection stability and standardized dimensional design, these screws are a mainstream choice for medium and high-load fastening scenarios. The one-piece hexagon socket drive and flange head structure eliminates the need for additional washers in assembly. Paired with 8.8 grade mechanical performance and zinc-plated anti-corrosion treatment, DIN 251 screws are widely adopted in various industrial assembly fields with strict requirements for connection firmness and installation efficiency.

Core Features

Integrated structure saves assembly time: The flange head replaces traditional flat washer and spring washer combinations, reducing assembly parts and improving fastening efficiency
Strong anti-loosening performance: Flange surface features anti-slip serrations (optional for standard models) to prevent loosening from mechanical vibration, ensuring long-term connection stability
Wide compatibility: Standardized DIN 251 dimensions cover mainstream metric thread specifications (M3-M24), adapting to various industrial workpiece and equipment fastening needs
Easy operation: Hexagon socket drive compatible with universal standard hexagon socket wrenches, requiring no special tools and suitable for narrow, confined installation spaces

Application Scenarios

DIN 251 8.8 grade zinc-plated hexagon socket flange head machine screws are versatile industrial fasteners widely used in automobile manufacturing, construction machinery, machine tool equipment, sheet metal cabinet production, electrical and electronic equipment, hydraulic and pneumatic components, and automation equipment assembly. Typical applications include engine component fastening, gearbox assembly, sheet metal cabinet connection, hydraulic cylinder fixed installation, electrical panel mounting, and engineering machinery structural part fastening. These are the preferred fasteners for mechanical scenarios requiring high connection stability, anti-loosening performance and assembly efficiency.

Technical Specifications

d	M3	M4	M5	M6	M8	M10
P	0.5	0.7	0.8	1	1.25	1.5
dk min	5.2	6.78	7.72	9.7	12.7	15.7
dk max	5.5	7	8	10	13	16
k min	2.75	3.82	4.82	5.7	7.7	9.7
k max	3	4	5	6	8	10
dc min	6.7	8.8	10.7	12.3	15.7	19.7
dc max	7	9	11	12.6	16	20
c min	0.8	1	1	1.3	1.8	2
c max	1	1.2	1.2	1.5	2	2.2
s	2.5	3	4	5	6	8
t min	1.3	2	2.5	3	4	5
Teeth	18	18	20	24	24	30

Packaging Options

Carton Packaging

Bolts are packed in neutral packaging boxes, with standard quantities arranged in small cartons. The exact number of units per carton will be confirmed with the customer to align with their specific requirements. Customized packaging configurations are available upon request.

Outer Cartonbox Packaging

The small cartons are then consolidated into larger master cartons for secure transportation and storage. The quantity per master carton can be customized based on client specifications or aligned with standard logistical requirements.

Pallet Packaging

The palletized units are securely wrapped with waterproof film and reinforced with packaging straps. Customer-specific shipping marks or labels are affixed to each pallet, ensuring clear identification and compliance with logistics requirements. This final packaging stage guarantees weather-resistant protection and stability during transportation.

Tags:

Products Details

Home > Products >

Allen Head Bolt

8.8 Grade Zinc Plated Industrial DIN251 Hexagon Socket Flange Head Allen Screw

All Category

8.8 Grade Zinc Plated Industrial DIN251 Hexagon Socket Flange Head Allen Screw

Brand Name:	YB
Model Number:	DIN251
MOQ:	10000
Price:	Negontiation
Packaging Details:	5000-10000/box
Payment Terms:	T/T

Detail Information

Product Description

Detail Information

Place of Origin:

ZheJiang,China

Brand Name:

Certification:

ISO9001

Model Number:

DIN251

Trademark:

YONGBIAO

Country Of Origin:

China

Drivetype:

Hex

Standardscompliance:

DIN251

Screw Type:

Allen Bolt

Thread Nominal:

M3-M10

Minimum Order Quantity:

10000

Price:

Negontiation

Packaging Details:

5000-10000/box

Delivery Time:

7-25 days

Payment Terms:

T/T

Supply Ability:

5000Tons/year

Highlight:

8.8 grade DIN251 Allen screw

zinc plated flange head bolt

industrial hexagon socket bolt

Product Description

8.8 Grade Zinc Plated Industrial DIN251 Hexagon Socket Flange Head Allen Screw

Product Overview

Core Features

Integrated structure saves assembly time: The flange head replaces traditional flat washer and spring washer combinations, reducing assembly parts and improving fastening efficiency
Strong anti-loosening performance: Flange surface features anti-slip serrations (optional for standard models) to prevent loosening from mechanical vibration, ensuring long-term connection stability
Wide compatibility: Standardized DIN 251 dimensions cover mainstream metric thread specifications (M3-M24), adapting to various industrial workpiece and equipment fastening needs
Easy operation: Hexagon socket drive compatible with universal standard hexagon socket wrenches, requiring no special tools and suitable for narrow, confined installation spaces

Application Scenarios

Technical Specifications

d	M3	M4	M5	M6	M8	M10
P	0.5	0.7	0.8	1	1.25	1.5
dk min	5.2	6.78	7.72	9.7	12.7	15.7
dk max	5.5	7	8	10	13	16
k min	2.75	3.82	4.82	5.7	7.7	9.7
k max	3	4	5	6	8	10
dc min	6.7	8.8	10.7	12.3	15.7	19.7
dc max	7	9	11	12.6	16	20
c min	0.8	1	1	1.3	1.8	2
c max	1	1.2	1.2	1.5	2	2.2
s	2.5	3	4	5	6	8
t min	1.3	2	2.5	3	4	5
Teeth	18	18	20	24	24	30

Packaging Options

Carton Packaging

Outer Cartonbox Packaging

Pallet Packaging

Tags:

Pan Head Screw

Bugle Head Screw

Self Tapping Screw

Self Drilling Screw

Stainless Steel Screw

Screw Kit

Concrete Anchor Bolt

Hex Head Bolt

Allen Head Bolt

Machine Bolt

Expansion Anchor Bolt

Hex Head Nut

Spring Lock Washer

Waterproof Cable Gland

CNC Machining Parts

Plastic Bolt

Pan Head Screw

Bugle Head Screw

Self Tapping Screw

Self Drilling Screw

Stainless Steel Screw

Screw Kit

Concrete Anchor Bolt

Hex Head Bolt

Allen Head Bolt

Machine Bolt

Expansion Anchor Bolt

Hex Head Nut

Spring Lock Washer

Waterproof Cable Gland

CNC Machining Parts

Plastic Bolt

products details

Pan Head Screw

Bugle Head Screw

Self Tapping Screw

Self Drilling Screw

Stainless Steel Screw

Screw Kit

Concrete Anchor Bolt

Hex Head Bolt

Allen Head Bolt

Machine Bolt

Expansion Anchor Bolt

Hex Head Nut

Spring Lock Washer

Waterproof Cable Gland

CNC Machining Parts

Plastic Bolt

8.8 Grade Zinc Plated Industrial DIN251 Hexagon Socket Flange Head Allen Screw

8.8 grade DIN251 Allen screw

zinc plated flange head bolt

industrial hexagon socket bolt

Products Details

Pan Head Screw

Bugle Head Screw

Self Tapping Screw

Self Drilling Screw

Stainless Steel Screw

Screw Kit

Concrete Anchor Bolt

Hex Head Bolt

Allen Head Bolt

Machine Bolt

Expansion Anchor Bolt

Hex Head Nut

Spring Lock Washer

Waterproof Cable Gland

CNC Machining Parts

Plastic Bolt

8.8 Grade Zinc Plated Industrial DIN251 Hexagon Socket Flange Head Allen Screw

8.8 grade DIN251 Allen screw

zinc plated flange head bolt

industrial hexagon socket bolt