Stainless Pan Head Self Tapping Screws
| Standard | DIN 7981 · ISO 7049 |
|---|---|
| Material | SS304 / SS316 |
| Strength Grade | A2-70 / A4-70 |
| Size Range | ST2.2-ST6.3 |
| Surface Treatment | Passivation / Polished |
01
Product Description
Product Description & Key Specifications
Stainless pan head self tapping screws are available with Phillips and Pozidriv cross recesses for sheet metal panels, trim brackets, covers, light equipment housings and corrosion-resistant assemblies. The pan head provides a broad raised bearing surface where flush installation is not required.
This product follows DIN 7981 / ISO 7049 references in SS304 / SS316 with A2-70 / A4-70 options and ST2.2-ST6.3 sizes. The RFQ should state Phillips or Pozidriv drive, screw diameter, length, point type, pilot hole size, sheet thickness, installation torque and surface-finish requirements.
SS304 / A2 is suitable for general indoor and normal atmospheric environments, while SS316 / A4 is recommended for coastal, washdown, chloride or rail exterior service. Passivation supports stainless surface condition, and polishing may be selected for exposed panels or visible trim hardware.
| Product type | Stainless pan head self tapping screws |
|---|---|
| Standards | DIN 7981 / ISO 7049 |
| Material | SS304 / SS316 |
| Strength grade | A2-70 / A4-70 |
| Size range | ST2.2-ST6.3 |
| Common models | ST2.9 x 9.5, ST3.5 x 13, ST4.2 x 16, ST4.8 x 19, ST5.5 x 25, ST6.3 x 32 |
| Drive and head | Phillips or Pozidriv cross recess with pan head |
| Surface finish | Passivation / Polished |
| Matched hardware | Sheet metal panels, brackets, trim parts and pilot holes |
| Documentation | CoC, material certificate and dimensional report on request |
Dimensions & SpecificationsDIN 7981 / ISO 7049
Technical Drawing
Dimensional Table
| Parameter | ST2.2 | ST2.9 | ST3.5 | ST3.9 | ST4.2 | ST4.8 | ST5.5 | ST6.3 | 95 | 98 |
|---|---|---|---|---|---|---|---|---|---|---|
| P | 0.8 | 1.1 | 1.3 | 1.3 | 1.4 | 1.6 | 1.6 | 1.8 | 1.8 | 2.1 |
| a/max | 0.8 | 1.1 | 1.3 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 | — | — |
| dk/max | 4.2 | 5.6 | 6.9 | 7.5 | 8.2 | 9.5 | 10.8 | 12.5 | — | — |
| dk/min | 3.9 | 5.3 | 6.54 | 7.14 | 7.84 | 9.14 | 10.37 | 12.07 | — | — |
| k/max | 1.8 | 2.2 | 2.6 | 2.8 | 3.05 | 3.55 | 3.95 | 4.55 | — | — |
| k/min | 1.55 | 1.95 | 2.35 | 2.55 | 2.75 | 3.25 | 3.65 | 4.25 | — | — |
| r/max | 0.3 | 0.4 | 0.5 | 0.5 | 0.6 | 0.7 | 0.8 | 0.9 | — | — |
| No. | 1 | 1 | 2 | 2 | 2 | 2 | 3 | 3 | — | — |
| M | 2.6 | 3 | 4.2 | 4.4 | 4.6 | 5 | 6.5 | 7.1 | — | — |
| t/min | 0.86 | 1.35 | 1.4 | 1.63 | 1.8 | 2.26 | 2.49 | 3 | — | — |
| t/max | 1.32 | 1.8 | 2.03 | 2.26 | 2.46 | 2.87 | 3.15 | 3.66 | — | — |
Engineering references
Technical resources
Review the applicable dimensions, drawing and standard relationship before confirming the ordered specification.02
Selection
Selection Advantages by Application
Sheet Metal Panels and Covers
Pan head self tapping screws are used where a raised head and broad bearing surface are acceptable, such as covers, small brackets and service panels.
Industrial equipment fastenersRailway Interior Trim and Brackets
SS304 / SS316 DIN 7981 screws support rail interior trim, brackets and equipment panels. A4 stainless can be selected for harsher cleaning or exterior exposure.
Railway fastenersConstruction and Architectural Hardware
Passivated or polished stainless pan head screws are used in exposed hardware, stainless panels and light construction accessories where corrosion resistance matters.
Construction fasteners03
Assembly
Recommended Matching Products
04
Manufacturing
Manufacturing & Quality Control
Manufacturing CapabilityQuality Control
Cold heading and thread forming for pan head self tapping screwsSS304 / SS316 material and wire diameter verification
Phillips or Pozidriv recess and pan head forming to DIN / ISO referenceHead height, head diameter, recess fit and thread profile inspection
Passivation or polishing according to corrosion and appearance needsSurface finish, burr and contamination checks after treatment
ST2.2-ST6.3 size production with project lengthsLength, point form and sample installation review when specified
Carton, bag or kit packaging for panel assembly linesLabel, quantity and lot traceability checks before shipment
05
FAQ
Common Questions Before RFQ
When should I use pan head self tapping screws?
Use them for sheet metal panels, brackets and covers where a raised head is acceptable and a reusable tapped insert is not required.
What is the difference between DIN 7981 and DIN 7982 screws?
DIN 7981 uses a pan head, while DIN 7982 uses a countersunk head for flush installation.
Can these screws be used in stainless panels?
Yes, but pilot hole size, sheet thickness and galling risk should be considered, especially when stainless is fastened to stainless.
Which material is better for coastal applications?
SS316 / A4 is preferred for coastal, chloride and washdown environments because it provides better pitting resistance than SS304.
Can polished pan head screws be supplied?
Yes. Polished and passivated finishes are available depending on appearance and corrosion requirements.
Need stainless pan head self tapping screws?
Send standard, ST size, length, stainless grade, finish, sheet thickness, pilot hole details and quantity. We can quote DIN 7981 / ISO 7049 screws for panel and trim assemblies.
Request a Quote
Get engineering support and pricing for this product — our team responds within 24 hours.