Home > Companies > Fixfast Ltd > DrillFast® A4/316 Stainless Steel Fasteners for 4.0–12.0 mm Steel

Stainless steel self-drilling fasteners for roofing and cladding (4–12 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 the mechanical fixing of 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, 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.

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):

40 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:

4–12 mm (steel).

Minimum penetration (heavy steel purlins):

25 mm (through underside).

Build up:

0–3 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 4 mm steel: 6.74 kN; on 6 mm steel: 8.93 kN; on 8 mm steel: 11.95 kN; on 12 mm steel: 11.95 kN.
  • Pull through values (axial load resistance): 0.5 mm steel with A15 washer: 3.38 kN.
  • Shear values (lateral load resistance, with A15 washer): 4 mm steel: 2.44 kN.

– Design values:

  • Pull out values (axial load resistance, to BS 5427): On 4 mm steel: 5.07 kN; on 6 mm steel: 6.71 kN; on 8 mm steel: 8.98 kN; on 12 mm steel: 8.98 kN.
  • Pull through values (axial load resistance): 0.5 mm steel with A15 washer: 2.54 kN.
  • Shear values (lateral load resistance, with A15 washer): 4 mm steel: 1.83 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 4.0–12.0 mm Steel, DF12-SSA4-5.5 x 40

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