SS Self Tapping Screw PAN Head
Stainless steel pan head self-tapping screws to ISO 7049 with a wide bearing surface that forms its own thread in pre-drilled holes. Available in A2 (304) and A4 (316) grades, sizes ST2.2 to ST6.3, with Form C or Form F point options.
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
#
Pan head self-tapping screws solve the problem of fastening thin or soft materials where pull-through is a concern. The pan head provides a wider bearing surface than countersunk alternatives, distributing clamping force over a larger area and reducing the risk of material deformation or tear-out. Unlike countersunk heads, pan heads do not require countersink preparation in the substrate, saving a manufacturing step. The self-tapping thread eliminates pre-tapping, reducing assembly time and tooling requirements. Stainless steel construction ensures corrosion resistance without coatings, making these screws suitable for outdoor, marine, and hygienic environments. The protruding head allows quick visual inspection to confirm all fasteners are installed. Engineers specify pan head self-tappers in sheet metal assemblies, cladding, and appliance manufacturing where wide load distribution, corrosion resistance, and fast installation are required without the need for a flush surface finish.
Common Applications
#
Pan head self-tapping screws are specified in thin-material assemblies where wide load distribution and corrosion resistance are required:
- Sheet metal fabrication and enclosure assembly
- HVAC ductwork and ventilation systems
- Electrical panel and control box assembly
- Automotive body panels, trim, and interior components
- Marine fittings and deck hardware
- Appliance manufacturing and assembly
- Metal cladding and facade panel attachment
- Solar panel mounting and framing
- Furniture and cabinet hardware
- Light fixture and 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 |
