#4 SS Self Tapping Screw PAN Head
ST2.9 (#4) stainless steel pan head self-tapping screws per ISO 7049 in A2 grade. Wide bearing surface forms its own thread in pre-drilled holes for corrosion-resistant assembly at ST2.9 gauge.
Specification
#
Standard
ISO 7049 (supersedes DIN 7981); equivalent to DIN EN ISO 7049
Thread
Coarse (standard)
Material
Stainless Steel 304 (A2)
Grade
A2-70
Stock
In stock (304). Grade 316 available against bulk order
Surface Finish
Plain/passivated (standard for stainless steel)
Head Type
Pan head — cylindrical with rounded top and flat bearing surface
Drive Type
Phillips (H), Pozidriv (Z), Hexalobular/Torx (IRS)
Point Form
Form C (cone/gimlet point) or Form F (flat/blunt end)
Dimension
#
Size (d mm)
Thread Dia (min-max mm)
Pitch
Length (mm)
Thread Length (mm)
ST2.9
2.9-2.9
1.1
13
13
ST3.5
3.5-3.5
1.3
16
16
ST4.2
4.2-4.2
1.4
19
19
ST4.8
4.8-4.8
1.6
22
22
ST5.5
5.5-5.5
1.8
25
25
- All dimensions in mm, tolerance +/- 0.01 mm. Additional dimensions available on request.
Benefits
#
Stainless steel pan head self-tapping screws at ST2.9 (#4) gauge provide wide load distribution in thin-material assemblies requiring corrosion resistance. The pan head bearing surface distributes clamping force over a larger area than countersunk alternatives, reducing material deformation risk. A2 (304) stainless steel eliminates coating degradation. Self-tapping thread eliminates pre-tapping operations. This gauge serves enclosure assembly, cladding attachment, and appliance manufacturing.
Common Applications
#
Common applications for ST2.9 (#4) stainless steel pan head self-tapping screws include:
- Thin-gauge enclosure assembly
- Small electrical box fabrication
- Light-duty cladding attachment
- Appliance housing assembly
- Small bracket mounting
Read Me
| Standard | ISO 7049 (supersedes DIN 7981); equivalent to DIN EN ISO 7049 |
| Thread | Coarse (standard) |
| Material | Stainless Steel 304 (A2) |
| Grade | A2-70 |
| Stock | In stock (304). Grade 316 available against bulk order |
| Surface Finish | Plain/passivated (standard for stainless steel) |
| Head Type | Pan head — cylindrical with rounded top and flat bearing surface |
| Drive Type | Phillips (H), Pozidriv (Z), Hexalobular/Torx (IRS) |
| Point Form | Form C (cone/gimlet point) or Form F (flat/blunt end) |
| Size (d mm) | Thread Dia (min-max mm) | Pitch | Length (mm) | Thread Length (mm) |
|---|---|---|---|---|
| ST2.9 | 2.9-2.9 | 1.1 | 13 | 13 |
| ST3.5 | 3.5-3.5 | 1.3 | 16 | 16 |
| ST4.2 | 4.2-4.2 | 1.4 | 19 | 19 |
| ST4.8 | 4.8-4.8 | 1.6 | 22 | 22 |
| ST5.5 | 5.5-5.5 | 1.8 | 25 | 25 |
