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Carbon steel self-drilling fasteners for roofing and cladding (3–8 mm).

Features and benefits:

  • High quality carbon steel with SAE1022 hardened case.
  • Consistently high pull-out and shear performance.
  • Good drilling and tapping performance.
  • Manufactured in accordance with ISO 9001 and ISO 14001 Quality and Management Systems.

Applications:

For mechanically fixing steel sheeting systems to heavy steel purlins and sections. 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):

28 x 5.5 mm.

Material:

Steel SAE1022 case, hardened.

Coating:

Multiple layer, organic.

Head type:

Hexagon, 8 mm.

Drilling capacity:

3–8 mm (steel).

Minimum penetration (heavy steel purlins):

16 mm (through underside).

Build up:

0–4 mm (dependent on washer used).

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 3 mm steel: 2.68 kN; on 4 mm steel: 4.34 kN; on 6 mm steel: 4.20 kN; on 8 mm steel: 4.34 kN.
  • Pull through values (axial load resistance): 0.5 mm steel with A15 washer: 3.38 kN.
  • Shear values (lateral load resistance): 3 mm steel with no washer: 2.34 kN; 3 mm steel with A15 washer: 1.91 kN.

- Design values:

  • Pull out values (axial load resistance, to BS 5427): On 3 mm steel: 2.02 kN; on 4 mm steel: 3.27 kN; on 6 mm steel: 3.16 kN; on 8 mm steel: 3.27 kN.
  • Pull through values (axial load resistance): 0.5 mm steel with A15 washer: 2.54 kN.
  • Shear values (lateral load resistance): 3 mm steel with no washer: 1.76 kN; 3 mm steel with A15 washer: 1.43 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® Fasteners for 3–8 mm Steel, DF8-5.5 x 28

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