Home > Companies > Fixfast Ltd > DrillFast® A4/316 Stainless Steel Fasteners for Timber to Steel 1.5–3.0 mm Thick

Stainless steel self-drilling fasteners for roofing and cladding from timber to steel (1.5–3.0 mm).

Features and benefits:

  • Grade 1.4401 (316), A4 stainless steel is used for optimum resistance to corrosion.
  • Bi-metal, manufactured for superior drilling performance.
  • The wings behind the drill point form a clearance hole through the timber, and break off on contact with the metal substrate.
  • Good pull-out and shear performance.
  • Manufactured in accordance with ISO 9001 and ISO 14001 Quality and Management Systems.

Applications:

Suitable for the mechanical fixing of timber components to light metal purlins and rails. For use in the following locations:

  • Buildings in residential and commercial settings with humidity class of Class 1, Class 2, Class 3 or Class 4 to BS 5250.
  • Buildings with an internal temperature range of -45°C to 50°C.
  • Coastal locations.

To be fixed with 2PZD or TX30, dependent on product reference chosen.

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

Standard product features

Material:

Grade 1.4401 (316) stainless steel with carbon steel case and hardened, welded point.

Coating:

Organic.

Head type:

Countersunk.

Drilling capacity:

1.5–3 mm (steel).

Minimum penetration (light steel purlins):

  • DF3-SSA4-W-4.8 (fasteners with 4.8 mm diameter): 21 mm (through underside).
  • DF3-SSA4-W-5.5 (fasteners with 5.5 mm diameter): 23 mm (through underside).

Build up:

5–53 mm (dependent on product reference chosen).

Durability class:

  • Interior environments: C1 (40).
  • Semi-interior: 40.
  • Urban: C2 (40).
  • Rural: C3 (30).
  • Industrial/ coastal: C4 (30).
  • Marine: C5 (25).

Technical characteristics:

– Characteristic values:

  • Pull out values (axial load resistance, to BS 5427): DF3-SSA4-W-4.8 (fasteners with 4.8 mm diameter): On 1.5 mm steel: 1.68 kN; on 2 mm steel: 2.41 kN; on 3.0 mm steel: 4.50 kN; DF3-SSA4-W-5.5 (fasteners with 5.5 mm diameter): On 1.5 mm steel: 1.80 kN; on 2 mm steel: 3.64 kN; on 3.0 mm steel: 6.24 kN.

– Design values:

  • Pull out values (axial load resistance, to BS 5427): DF3-SSA4-W-4.8 (fasteners with 4.8 mm diameter): On 1.5 mm steel: 1.26 kN; on 2 mm steel: 1.81 kN; on 3.0 mm steel: 3.38 kN; DF3-SSA4-W-5.5 (fasteners with 5.5 mm diameter): On 1.5 mm steel: 1.35 kN; on 2 mm steel: 2.74 kN; on 3.0 mm steel: 4.69 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

Product specification

An important note about specifying

Manufacturer

Name:

Fixfast Ltd

Tel:

+44 (0)1732 882387

Product reference

[DrillFast® A4/316 Stainless Steel Fasteners for Timber to Steel 1.5–3.0 mm Thick, DF3-SSA4-W-4.8 x 40]
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40 x 4.8 mm (l x diameter).
[DrillFast® A4/316 Stainless Steel Fasteners for Timber to Steel 1.5–3.0 mm Thick, DF3-SSA4-W-5.5 x 40]
-
40 x 5.5 mm (l x diameter).
[DrillFast® A4/316 Stainless Steel Fasteners for Timber to Steel 1.5–3.0 mm Thick, DF3-SSA4-W-5.5 x 60]
-
60 x 5.5 mm (l x diameter).
[DrillFast® A4/316 Stainless Steel Fasteners for Timber to Steel 1.5–3.0 mm Thick, DF3-SSA4-W-5.5 x 80]
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80 x 5.5 mm (l x diameter).

Washers

[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
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