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Self-Drilling Screws For Metal Sheets 5.5 x 25mm with Washer T14, Zinc Plated - Plastic Bag- 100 pcs

Steel

OC-55025T-ZP-100

5391512825768

Koelner

The special drill bit shape designed to provide quick and trouble-free installation in metal constructions made from cold formed sections

Define product parameters:

Diameter
Washer
Length
Packaging and quantity

Features

The special drill bit shape designed to provide quick and trouble-free installation in metal constructions made from cold formed sections

  • Screws available with a coloured polyester coating (RAL) provide additional corrosion protection and ensure aesthetic matching with roofing or façade cladding. UV stabilisers guarantee long-term colour durability and resistance to fading throughout the service life.
  • The case-hardened thread ensures high cutting performance and secure anchorage in the substrate, while maintaining a ductile core. This increases resistance to dynamic loads and reduces the risk of screw fracture.
  • The self-vulcanizing EPDM sealing washer is resistant to UV radiation, ageing, and temperature fluctuations. It guarantees long-term watertightness and protects the joint against water ingress.
  • The optimised drill point geometry enables efficient drilling in steel, reducing installation time and increasing assembly efficiency

Substrates

Metal sheet & profiles

Metal sheet & profiles

Structural steel

Structural steel

Approved surfaces

Applications

Drilling and screwing

Profiled and cover sheets

Full list of variations

Services

Installation guide

Installation manual

Installation step by step

1

Using the magnetic attachment, tighten the screw with washer using a screwdriver with adjustable torque.

2

Screw properly tightened.

Approvals and publications

Technical library

(8)

Technical assessments(3)

ETA-24/0237 (2026-09-02) - Fastening screws for metal members and sheeting

Fastening screws for metal members and sheeting

KOT-0159/2018

KOT-0159_2018_edition 2

UKTA-22/6370

UKTA-22/6370

Declarations(3)

DoP-24/0237 OC (ETA-24/0237 - Self-drilling screws)

OC - Fastening screws for metal members

KDWU-2018/0159-2

KDWU

UKTA-DoP-22/6370-OC

Certificates(2)

1488-CPR-0752/Z (ETA-24/0237 - Self-drilling screws)

CPR - ETA-24/0237 (2024-12-20) - Fastening screws for metal members and sheeting

020_UWB_0850_Z

UWB

Catalogues and product cards

(4)

Product cards(1)

PIM_R_OC_card

Catalogues(3)

Catalogue Offer (overview) - EN

Specification Design Guide

General Catalogue EN 2026/27

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