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Carbon steel self-drilling fasteners for roofing.

Features and benefits:

  • High quality carbon steel with SAE1022 hardened case.
  • Good drilling and tapping performance.
  • Consistently high pull-out and shear performance.
  • Head designed for easy, self-coring installation.
  • Manufactured in accordance with ISO 9001 and ISO 14001 Quality and Management Systems.

Applications:

  • DF3-TD: For fastening membrane faced composite panels to steel 1.2–3 mm thick.
  • DF6-TD: For fastening membrane faced composite panels to a wide range of steel thicknesses from 1.6–6 mm, including purlin sleeves.
  • DF12-TD: For fastening membrane faced composite panels to steel 4–12 mm thick.
  • DFT-TD: For fastening membrane faced composite panels to timber purlins.

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 TD drive bar.

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

Standard product features

Material:

Steel SAE1022 case, hardened.

Coating:

Multiple layer organic.

Head type:

TD 3 PZD.

Drilling capacity:

  • DF3-TD: 1.2–3 mm (steel).
  • DF6-TD: 1.6–6 mm (steel).
  • DF12-TD: 4–12 mm (steel).
  • DFT-TD: Timber.

Minimum penetration:

  • Light steel (DF3-TD): 18 mm (through underside).
  • Medium steel (DF6-TD): 18 mm (through underside).
  • Heavy steel (DF12-TD): 20 mm (through underside).
  • Timber (DFT-TD): 35 mm (through underside).

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): DF3-TD: On 1.2 mm steel: 1.57 kN; on 2 mm steel: 2.95 kN; on 3 mm steel: 5.42 kN. DF6-TD: On 3 mm steel: 6.27 kN; 4 mm steel: 9.11 kN; 6 mm steel: 15.4 kN. DF12: On 4 mm steel: 8.04 kN; 6 mm steel: 15.43 kN; 8 mm steel: 15.43 kN; 12 mm steel: 15.43 kN. DFTY-TD: On timber (35 mm embedment): 3.4 kN.
  • Pull through values (axial load resistance for DFT-TD, with no washer): 3.26 kN.
  • Shear values (lateral load resistance): DF3-TD: On 3 mm steel: 3.14 kN; DF6-TD: 3 mm steel: 3.14 kN; DF12-TD: 4 mm steel: 3.30 kN; DFT-TD: Timber: 2.81 kN.

- Design values:

  • Pull out values (axial load resistance, to BS 5427): DF3-TD: On 1.2 mm steel: 1.18 kN; on 2 mm steel: 2.22 kN; on 3 mm steel: 4.07 kN. DF6-TD: On 3 mm steel: 4.71 kN; 4 mm steel: 6.84 kN; 6 mm steel: 11.57 kN. DF12-TD: On 4 mm steel: 6.04 kN; 6 mm steel: 11.6 kN; 8 mm steel: 11.6 kN; 12 mm steel: 11.6 kN. DFTY-TD: On timber (35 mm embedment) : 2.55 kN.
  • Pull through values (axial load resistance for DFT-TD, with no washer): 2.45 kN.
  • Shear values (lateral load resistance): DF3-TD: On 3 mm steel: 2.36 kN. DF6-TD: 3 mm steel: 2.36 kN. DF12-TD: 4 mm steel: 2.48 kN. DFT-TD: Timber: 2.11 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 1.2–3 mm Light Steel, DF3-TD-6.3 x 30]
-
30 x 6.3 mm (l x diameter).
[DrillFast® Fasteners for 1.6­–6 mm Medium Steel, DF3-TD-6.3 x 30]
-
30 x 6.3 mm (l x diameter).
[DrillFast® Fasteners for 4–12 mm Heavy Steel, DF12-TD-6.3 x 45]
-
45 x 6.3 mm (l x diameter).
[DrillFast® Fasteners for Timber, DFT-TD-6.5 x 50]
-
50 x 6.5 mm (l x diameter).

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