DIN 7504 K Hex Tek Screw – representative photo

Representative photo. Finish, head marking and packaging follow your order.

Self-Drilling Screws

DIN 7504 K Hex Washer Head Self-Drilling Screw

Hex washer head self-drilling screw to DIN 7504 form K: drill point, thread and washer face in one part. With bonded EPDM washer it is the standard roofing and cladding screw for steel purlins; without it, a framing and HVAC screw.

Standard: DIN 7504 K / ISO 15480
Equivalents: ASME B18.6.4 Tek type
Sizes: 4.2 – 6.3 mm (#8 – #14)
Lengths: 13 – 150 mm
Grades: Case hardened, Bi-metal (stainless head + carbon point)
Materials: Carbon steel C1022; Stainless 410; Bi-metal 304/C1022
Thread: ST tapping thread
MOQ: 500 pcs per size (negotiable for trial orders)

Finishes

Finish	Applied	Notes
Zinc-nickel	Our own line	12–15 µm, clear or black passivation; 1,000 h (12 µm) to 1,440 h (15 µm) neutral salt spray
Zinc plated	Our own line	Clear/blue, yellow or black passivation
Zinc flake (Dacromet/Geomet type)	Available	Electrolyte-free, no hydrogen embrittlement risk

For property class 10.9 and above, choose zinc flake, or zinc-nickel with hydrogen-embrittlement relief agreed at order stage.

Applications

Metal roofing and cladding
Steel framing
HVAC and solar mounting

Ordering terms

MOQ: 500 pcs per size (negotiable for trial orders)
Mixed sizes: Welcome in one order
Samples: Samples available — cost and lead time quoted per request
Lead time: 15–25 days for standard parts; finishes such as HDG or Dacromet add a few days
Payment: T/T 30% deposit, 70% before shipment
Shipping: FOB Ningbo / CIF / DDP on request
Packaging: Cartons on pallets, or private-label boxes and bags
Documents: Material certificate, coating thickness and salt-spray reports on request
Custom: Drawings, non-standard sizes, coatings, marking and private-label packaging

DIN 7504 K Hex Tek Screw FAQ

How many hours salt spray for zinc-nickel roofing screws?

Zn-Ni at 12 µm reaches about 1,000 h neutral salt spray on our line, many times longer than standard blue zinc.

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DIN 7504 K Hex Washer Head Self-Drilling Screw

Features

Finishes

Applications

Ordering terms

DIN 7504 K Hex Tek Screw FAQ

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