Home > Companies > Fixfast Ltd > DrillFast® Decking Fasteners

Carbon steel self-drilling fasteners for roofing and cladding (1.2–3 mm).

Features and benefits:

  • High quality carbon steel with SAE1022 hardened case.
  • 15 mm flange provided under head for greater load bearing.
  • High drilling and tapping performance.
  • Consistently high pull-out and shear performance.
  • Manufactured in accordance with ISO 9001 and ISO 14001 Quality and Management Systems.

Applications:

For mechanically fixing steel decking to metal purlins and rails. For use in the following locations:

  • Buildings in residential and commercial settings with humidity class of Class 1, Class 2 or Class 3 to BS 5250.
  • Buildings with an internal temperature range of -45°C to 50°C.

To be fixed with Fixfast YellowDrive.

Fixfast products must be used as a complete system with tools and accessories as recommended - consult manufacturer for details.

Standard product features

Size (l x diameter):

25 x 5.5 mm.

Material:

Steel SAE1022 case, hardened.

Coating:

Multiple layer organic.

Head type:

Hexagon 8, mm.

Drilling capacity:

1.2–3 mm (steel).

Minimum penetration (light steel purlins and rails):

16 mm (through underside).

Build up:

0–5 mm.

Durability class:

  • Interior environments: C1 (25).
  • Semi-interior: 20.
  • Urban: C2 (12).
  • Rural: C3.
  • Industrial/ coastal: C4.
  • Marine: C5.

Technical characteristics:

- Characteristic values:

  • Pull out values (axial load resistance, to BS 5427): On 1.2 mm steel: 1.52 kN; on 2 mm steel: 3.01 kN; on 3 mm steel: 5.42 kN.
  • Pull through values (axial load resistance): 0.5 mm steel: 3.34 kN; 0.7 mm steel: 5.18 kN.
  • Shear values (lateral load resistance): On 1.2 mm steel: 2.14 kN; 2 mm steel: 2.39 kN.

- Design values:

  • Pull out values (axial load resistance, to BS 5427): On 1.2 mm steel: 1.14 kN; on 2 mm steel: 2.27 kN; on 3 mm steel: 4.08 kN.
  • Pull through values (axial load resistance): 0.5 mm steel: 2.51 kN; 0.7 mm steel: 3.89 kN.
  • Shear values (lateral load resistance): 1.2 mm steel: 1.60 kN; 2 mm steel: 1.80 kN.

Other figures and specific testing are available on request - consult manufacturer for information.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-50-60/415 Self-drilling or self-tapping screws

NBS Specification

NBS Buliding logo
This product is associated with the following NBS clauses:

Product specification

An important note about specifying

Manufacturer

Name:

Fixfast Ltd

Tel:

+44 (0)1732 882387

Product reference

DrillFast decking fasteners 1.2 - 3 mm steel, DF3-H15-5.5 x 25

Washer

[Required]
-
Consult manufacturer for information.
[Not required]

Manufacturer details

Merlin House,
Seven Mile Lane,
Borough Green,
Sevenoaks,
Kent, TN15 8QY
Tel +44 (0)1732 882387
Fax +44 (0)1732 885532
NBS Plus
RIBA CPD