DIN 933 M1.6
Hexagon head screw,threaded up to the head
- Thread M1.6 × 0.35
- Spanner 3.2 mm
- Tap drill Ø 1.25 mm
Dimensions and tolerances (mm)
| min | nom. | max | |
|---|---|---|---|
| d | |||
| s | |||
| e | |||
| k | |||
| dw |
Values per ISO 4017:2022. In DIN 933: dw = 2.40
In bold: the value shown in the table on the standard page.
Design and assembly (mm)
- Tap drillDIN 336, coarse thread
- Ø 1.25
- Clearance holeISO 273, dh by fit
- close Ø 1.7normal Ø 1.8loose Ø 2.0
Mechanical properties
Preload and torque for: medium clearance hole (ISO 273), tightening to ν = 90 % of yield, coarse thread, µG = µK = 0.14.
| Property class | Loads, ISO 898-1 | Tightening, VDI 2230 | Calculator | ||
|---|---|---|---|---|---|
| ProofkN | BreakkN | PreloadkN | TorqueN·m | ||
| Steel 8.8Steel 8.8 Tensile strength Rm ≥ 800 MPa, yield Rp0.2 ≥ 640 MPa (80 % of Rm). The everyday property class for machine parts. The property class this standard is usually made in.usual | Property class 8.8 does not cover M1.6. | ||||
| Steel 10.9Steel 10.9 Tensile strength Rm ≥ 1040 MPa, yield Rp0.2 ≥ 940 MPa (90 % of Rm). High strength, for heavily loaded joints. | Property class 10.9 does not cover M1.6. | ||||
| Stainless A2-70Stainless A2-70 Tensile strength Rm ≥ 700 MPa, yield Rp0.2 ≥ 450 MPa. Austenitic stainless A2 (like AISI 304): general corrosion resistance. | Property class A2-70 does not cover M1.6. | ||||
* Stainless: load at yield (Rp0.2 × As); ISO 3506-1 gives no proof load.
Stainless steel: the real friction is higher and scatters widely, so the torque shown is only a starting point; type your own µ in the box.
- Stress area As
- 1.3 mm²
- Shank area A
- 2.0 mm²
Standard threads (mm)
| P | d₂ | d₃ | |
|---|---|---|---|
| M1.6Coarse (most common) | 0.35 | 1.373 | 1.171 |
Profile per ISO 68-1 · tolerance class 6g
Standard lengths (mm)
Length l measured from under the head.
Verified data
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References
- DIN 933:1987 Hexagon head screws threaded up to the head; product grades A and B
- ISO 4017:2022 Fasteners — Hexagon head screws — Product grades A and B
- ISO 68-1:1998 ISO general purpose screw threads — Basic profile — Part 1: Metric screw threads
- ISO 898-1:2013 Mechanical properties of fasteners made of carbon steel and alloy steel — Part 1: Bolts, screws and studs
- ISO 3506-1:2020 Fasteners — Mechanical properties of corrosion-resistant stainless steel fasteners — Part 1: Bolts, screws and studs
- VDI 2230 Part 1:2015 Systematic calculation of highly stressed bolted joints — Joints with one cylindrical bolt
- DIN 336:2003 Diameters of drills for minor diameters of tapped threads
- ISO 273:1979 Fasteners — Clearance holes for bolts and screws