Home > Companies > Fixfast Ltd > DrillFast® A4/316 Stainless Steel Fasteners for 1.2–3.0 mm Steel

Stainless steel self-drilling fasteners for roofing and cladding (1.2–3 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.
  • Good pull-out and shear performance.
  • Manufactured in accordance with ISO 9001 and ISO 14001 Quality and Management Systems.

Applications:

Suitable for mechanical fixing of the following:

  • Metal sheeting systems to light metal purlins and rails.
  • Components of steel, aluminium and metal framing systems.

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 (but should not be placed into contact with sea water).

To be fixed with Fixfast GreenDrive (8 mm hexagon integral socket with retaining clip).

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):

35 x 5.5 mm (nominal).

Material:

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

Coating:

Organic.

Head type:

Hexagon, 8 mm.

Drilling capacity:

1.2–3 mm (steel).

Minimum penetration (light steel purlins):

19 mm (through underside).

Build up:

0–13 mm (dependent on washer used).

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): On 1.2 mm steel: 1.08 kN; on 2 mm steel: 2.94 kN; on 3.0 mm steel: 5.21 kN.
  • Pull through values (axial load resistance): 0.5 mm steel with A15 washer: 3.38 kN; 0.7 mm steel with A15 washer: 4.97 kN.
  • Shear values (lateral load resistance, with A15 washer): 1.2 mm steel: 2.24 kN.

– Design values:

  • Pull out values (axial load resistance, to BS 5427): On 1.2 mm steel: 0.64 kN; on 2 mm steel: 2.21 kN; on 3.0 mm steel: 3.92 kN.
  • Pull through values (axial load resistance): 0.5 mm steel with A15 washer: 2.54 kN; 0.7 mm steel with A15 washer: 3.73 kN.
  • Shear values (lateral load resistance, with A15 washer): 1.2 mm steel: 1.68 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® A4/316 Stainless Steel Fasteners for 1.2–3.0 mm Steel, DF3-SSA4-5.5 x 35

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
NBS Plus
RIBA CPD