Evolution Fasteners 5.5 x 25mm A2 Bi-Metal Lowered Dome Head Screw Tek 3 (Box of 200) - A2LDH-12-5.5-25-3

Evolution Fasteners 5.5 x 25mm A2 Bi-Metal Lowered Dome Head Screw Tek 3 (Box of 200) - A2LDH-12-5.5-25-3
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Tue 20th Oct 2026

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Product ID: A2LDH_12_5_5_25_3

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Manufacturer: Evolution Fasteners

Price: (£52.68 ex VAT) £63.22 (inc VAT)

63.22 2026-11-17
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Evolution Fasteners 5.5 x 25mm A2 Bi-Metal Lowered Dome Head Screw Tek 3 (Box of 200) - A2LDH-12-5.5-25-3

Bi-metal fasteners have a hardened carbon steel drilling point (AISI C1022) brazed to a stainless steel (AISI 304 / EN 1.4301 (A2)) body and head.

The dome-head design contributes to a neat and professional look while maintaining the structural integrity of the fastened components.

The compression disc is a key feature for weather resistance. The EPDM material provides an effective seal against water and environmental elements, preventing water ingress and potential damage to the fastened materials. The stainless steel compression disc ensures durability and maintains the tight seal over time.

  • Designed For - Fixing components, brackets and misc. hardware to light gauge steel substrates.
  • Head Style - 12mm ØD low profile (3.18mm) domed head.
  • Drive Type - Torx 25 female drive recess.
  • Washer Type - 12mm ØD Vulcanised EPDM with Stainless steel (AISI 304 / EN 1.4301 (A2)) compression disc.
  • Thread Form - Coarse thread (Pitch = 1.8mm (approx.)
  • Material Guide - AISI 304/ EN 1.4301 (A2)
  • Drill Speed - 1,500 - 2,500 RPM
  • Coating - Electroplated Zinc
  • Drill Point Material - Carbon Steel

Brand: Evolution Fasteners

Identifier: A2LDH_12_5_5_25_3

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