Hexagon head self-drilling screw with EPDM washer
Drill point and thread for fastening in one operation. Dimensions and tolerances refer to the stated execution; materials, finishes and drilling conditions are described separately.
Self-drilling screws
- Reference
- Ambrovit 81172
- Thread
- Self-drilling
- Drive
- External hexagon
- Units
- mm
Representative geometry photograph. Material and finish are specified separately.
Technical drawing and legend
Ambrovit reference execution 81172
Drawing not to scale.
- A
- Width across flats
- B
- Flange or wafer head diameter
- H+U
- Combined head and flange height
- d
- External thread diameter
- P
- Thread pitch
- W
- Sealing washer outside diameter
- R
- Indicative driving speed (rpm)
- T
- Drilling capacity for the specified execution
- l
- Required length, to be specified in the quotation
Dimensions
Dimensions in mm, except drive size. Min./Max. and approximate values (~) follow the Ambrovit catalogue for this execution and do not automatically apply to other versions. * Diameter identified by the manufacturer as having a thread-forming thread. W14, W16 and W18 identify washer executions, not tolerance limits. Specify the washer in the quotation.
| Nominal diameter | Limit | A | B | H+U | d | P | W |
|---|---|---|---|---|---|---|---|
| 4,2 | Min. | 6,78 | 8,20 | 4,00 | 4,09 | ~1,41 | W14 |
| 4,2 | Max | 7,00 | 8,80 | 4,25 | 4,22 | ~1,41 | W14 |
| 4,8 | Min. | 7,78 | 9,80 | 4,15 | 4,65 | ~1,59 | W14 |
| 4,8 | Max | 8,00 | 10,50 | 4,45 | 4,80 | ~1,59 | W16 |
| 5,5 | Min. | 7,78 | 10,00 | 5,15 | 5,31 | ~1,81 | W16 |
| 5,5 | Max | 8,00 | 11,00 | 5,45 | 5,46 | ~1,81 | W18 |
| 6,3 * | Min. | 9,78 | 12,20 | 6,15 | 6,10 | ~1,80 | W16 |
| 6,3 * | Max | 10,00 | 13,20 | 6,45 | 6,25 | ~1,80 | W18 |
Materials and finishes
Executions documented by the named suppliers. Dueemme confirms material, coating and actual availability in the quotation. Not every combination applies to every diameter or geometry.
| Material | Finish / execution | Reference |
|---|---|---|
| C1022 steel | zinc plating with Cr3 passivation | Ambrovit 81172 |
| Stainless steel A1 / A2; A4 | Executions for soft metals; finish to be specified | Tobsteel K0 |
Documentation
Download Dueemme data sheet ↓| Document | Status |
|---|---|
| Declaration of conformity | Subject to order agreement |
| Material certificate | Subject to order agreement |
| EN 10204 2.2 test report | Subject to order agreement |
| EN 10204 3.1 inspection certificate | Subject to order agreement |
| Dimensional inspection report | Subject to order agreement |
| Coating report | Subject to order agreement |
| Other documentation | Subject to order agreement |
Batch documents are not automatically included: specify your requirements in the RFQ.
Drilling and application conditions
The R and T values below apply only to the Ambrovit C1022 steel execution. R is an indicative laboratory value: speed, substrate thickness and strength must be checked for the application. Where T depends on length, capacity is specified for the requested execution.
| Diameter | R (rpm) | T (mm) / condition |
|---|---|---|
| 4,2 | 2.000 | To be determined from the point and required length |
| 4,8 | 2.000 | To be determined from the point and required length |
| 5,5 | 2.000 | 4,00 |
| 6,3 * | 2.000 | 6,00 |
Declared hardness for Ambrovit 81172: surface HV ≥ 560; core HV 330-425. For diameter 6.3: core HV 270–425. Solid stainless executions for soft metals, such as aluminium, do not inherit case-hardened steel drilling values. Bimetallic screws require separate verification of the body and drill point. Specify the diameter and material of the EPDM sealing washer; control tightening to avoid damaging the seal.
Request a quotation
Specify type, diameter, required length, quantity, material and finish, plus the material and thickness to be drilled. Dueemme will confirm execution and availability.
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