Home > Companies > Fixfast Ltd > DrillFast® A4/316 Stainless Steel Stitching Fasteners

Stainless steel self-drilling stitching fasteners for roofing and cladding.

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.
  • Free-spin design helps to prevent damage arising from over-driving the fastener.
  • Manufactured in accordance with ISO 9001 and ISO 14001 Quality and Management Systems.

Applications:

Suitable for the mechanical fixing/ stitching together of two metal sheets up to 1 mm thick. 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):

25 x 6.3 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:

Two steel sheets up to 1 mm thick each.

Minimum penetration (sheet material):

14 mm (through underside).

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 0.5 mm steel: 0.60 kN; on 1 mm steel: 1.23 kN.
  • Pull through values (axial load resistance): 0.5 mm steel with A15 washer: 3.60 kN.
  • Shear values (lateral load resistance, with no washer/ A15 washer): 0.5 mm steel: 1.05 kN.

– Design values:

  • Pull out values (axial load resistance, to BS 5427): On 0.5 mm steel: 0.45 kN; on 1 mm steel: 0.72 kN.
  • Pull through values (axial load resistance): 0.5 mm steel with A15 washer: 2.71 kN.
  • Shear values (lateral load resistance, with no washer/ A15 washer): 0.5 mm steel: 0.79 kN.

Other figures and specific testing are available on request - consult manufacturer for information.

Options

Product reference:

Consult manufacturer for details.

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 Stitching Fasteners, DF2-SSA4-A15-6.3 x 25]
[DrillFast® A4/316 Stainless Steel Stitching Fasteners, DF2-SSA4-A19-6.3 x 25]

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