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Hexagon Flange Head Self Drilling Screws with Collar DIN 7504K

Product Details

STANDARD : DIN 7504K

SIZE : 2.9 TO 6.5MM LENGTH 9.5 TO 50MM

HEAD TYPE : Hexagon Flange Head

TAIL TYPE : Self-drilling

MATERIAL : Carbon Steel/Stainless Steel

FINISH : Dacromet/Plain/Customized

Packaging & Shipping

PACKAGING : Bulk Pack | Small Boxed

PRICE TERMS : Fob/CFR/CIF/DDP/DAP

Description Specification Related Products Form

Description

Manufactured from high-quality high-strength carbon steel (1022/10B21) or stainless steel (304/410) via precision cold forging, heat treatment, and thread rolling, they can be zinc-plated, colored zinc, Dacromet, or stainless steel finished for corrosion resistance and weatherability. The screws feature a hex flange head with an integrally formed flat washer, eliminating the need for separate washers; the shank has machine threads with a high-hardness self-drilling tip, enabling direct penetration of steel and tapping without pre-drilling. The hex flange head is compatible with wrenches and sockets, with the flange increasing the bearing area to protect the substrate from crushing. The self-drilling tip cuts efficiently to significantly improve construction efficiency, making them industrial-grade fastening solutions balancing connection stability, ease of installation, and versatility.

Main Features:

1.Hex Flange Head Design: Hex head compatible with wrenches/sockets, integrally formed flange increases bearing area to distribute fastening pressure and protect the substrate from crushing

2.Integrated Flat Washer: Built-in flat washer eliminates the need for separate washers, saving installation steps and improving construction efficiency

3.High-Hardness Self-Drilling Tip: Quenched drill tail with high hardness and wear resistance, directly penetrating steel up to 2.5mm without pre-drilling

4.Multi-Material & Surface Treatments: Carbon steel Hexagon Flange Head Self Drilling Screws with Collar DIN 7504Kversions available with zinc/colored zinc/Dacromet finishes; stainless steel versions in 304/410, suitable for indoor, outdoor, and coastal environments

5.High-Strength Carbon Steel/Stainless Steel: Premium 1022/10B21 carbon steel or 304/410 stainless steel with quenched and tempered heat treatment, high hardness and toughness, resistant to breakage and deformation

6.Wide Range of Sizes: Available in #8-#14 diameters and various lengths to fit different hole sizes, steel plate thicknesses, and working conditions

7.Anti-Loosening Serrations (on some models): Anti-slip serrations on the flange increase friction with the workpiece, enhancing anti-loosening performance and reducing loosening after long-term use

Common Applications:

1.Steel Structure & Color Steel Tile Projects: Installation and connection of color steel tiles, metal roof panels, purlins, and steel structural parts

2.Light Steel Keel & Composite Connections: Fixing light steel keels, drywall ceilings, and partitions to wood basesHexagon Flange Head Self Drilling Screws with Collar DIN 7504K

3.Equipment & Electrical Installation: Connecting and fixing distribution boxes, surveillance brackets, equipment enclosures to metal/wood substrates

4.Building Decoration Projects: Installation and fixing of indoor ceilings, partitions, door/window frames, drywall, and OSB boards

5.Outdoor & Anti-Corrosion Projects: Connecting and fixing outdoor facilities, canopies, sheds, and railings to metal supports

6.Repair & Renovation Projects: Connection reinforcement in old house renovation, light steel retrofits, and steel structure repairs

7.Industrial & Mechanical Installation: Connecting and fixing small equipment, industrial supports, and mechanical accessories

Specification

Thread

2.9

3.5

3.9

4.2

4.8

5.5

6.3

P

1.1

1.3

1.3

1.4

1.6

1.8

1.8

a

Max.

1.1

1.3

1.3

1.4

1.6

1.8

1.8

c

Min.

0.4

0.6

0.6

0.8

0.9

1

1

dc

Max.

6.3

8.3

8.3

8.8

10.5

11

13.5

Min.

5.8

7.6

7.6

8.1

9.8

10

12.2

e

Min.

4.28

5.96

5.96

7.59

8.71

8.71

10.95

k

Max.

2.8

3.4

3.4

4.1

4.3

5.4

5.9

Min.

2.5

3

3

3.6

3.8

4.8

5.3

kw

Min.

1.3

1.5

1.5

1.8

2.2

2.7

3.1

r

Max.

0.4

0.5

0.5

0.6

0.7

0.8

0.9

s

Max.

4

5.5

5.5

7

8

8

10

Min.

3.82

5.32

5.32

6.78

7.78

7.78

9.78

dp

2.3

2.8

3.1

3.6

4.1

4.8

5.8

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