Engineering Data Sheets
Fastener Data Sheets& CAD
Browse ISO, DIN, ASTM and ASME fastener standards with dimensional specifications, CAD blueprints, drilling & clearance data, chemical composition and mechanical properties.
Reference: DIN 125A / ISO 7089
Fastener Catalog & Standard Specification
Active: DIN 125A / ISO 7089 (Flat Washer (Form A))
Select a fastener below to view its data sheet
DIN 125A / ISO 7089DIN STANDARDNon-ThreadedMetric Coarse
Standard Flat Washers (Form A - Without Chamfer)
Precision punched circular plain washer. Distributes fastener load and protects base material from surface marring.
CAD Schematic
Nominal blueprint for M6
Engineering Schematic / CAD Dimension InspectorModel: M6
Nominal Thread (d)M6 P=-mm
Wrench / Allen (s)0mm e=0
Tap Drill DiameterØ 0 mm
Tensile Stress Area (Aₛ)0 mm²
Manufacturing & Drilling Engineering Notes
- • For 8.8 and higher grade bolts, use minimum 200 HV or 300 HV hardened washers to prevent dishing/cupping under preload.
Size Specification Inspector
M6Select diameter & order quantity
Select Nominal Thread Diameter
Thread Pitch- mm
Wrench (A/F Spanner s)N/A
Recommended Tap DrillØ 0 mm
Clearance Hole (H13)Ø 0 mm
Tensile Stress Area (Aₛ)0 mm²
Chemical Composition & Metallurgy
Elemental mass percentages, grain structure & mechanical properties
Elemental Composition (Mass %)
CCarbon0.25 - 0.55%
MnManganese0.60 - 1.20%
PPhosphorus0.025% max
SSulfur0.025% max
SiSilicon0.15 - 0.35%
CrChromium0.20 - 0.50% (Optional)
BBoron0.0008 - 0.005% (Boron-treated)
FeIronBalance (~97.5%)
Mechanical Strength & Heat Treatment
Metallurgical Notes
- • Quenched and tempered at min 425°C to achieve fine tempered martensite microstructure.
- • Meets ISO 898-1 / ASTM F568M Class 8.8 specifications.
- • Boron-alloyed steels must contain min 0.0008% active Boron for hardenability.
Dimensional Specification
Thread / Pitch / Across Flats / Corners / Height / Drill / Clearance / Stress Area (mm)
| Thread (d) | Pitch | A/F (s) | Corners (e) | Height | Tap Drill | Clear H13 | Stress Area | |
|---|---|---|---|---|---|---|---|---|
| M3 | - | 0 | 0 | 0.5 | 0 | 0 | 0 | |
| M4 | - | 0 | 0 | 0.8 | 0 | 0 | 0 | |
| M5 | - | 0 | 0 | 1 | 0 | 0 | 0 | |
| M6 | - | 0 | 0 | 1.6 | 0 | 0 | 0 | |
| M8 | - | 0 | 0 | 1.6 | 0 | 0 | 0 | |
| M10 | - | 0 | 0 | 2 | 0 | 0 | 0 | |
| M12 | - | 0 | 0 | 2.5 | 0 | 0 | 0 | |
| M14 | - | 0 | 0 | 2.5 | 0 | 0 | 0 | |
| M16 | - | 0 | 0 | 3 | 0 | 0 | 0 | |
| M18 | - | 0 | 0 | 3 | 0 | 0 | 0 | |
| M20 | - | 0 | 0 | 3 | 0 | 0 | 0 | |
| M22 | - | 0 | 0 | 3 | 0 | 0 | 0 | |
| M24 | - | 0 | 0 | 4 | 0 | 0 | 0 | |
| M27 | - | 0 | 0 | 4 | 0 | 0 | 0 | |
| M30 | - | 0 | 0 | 4 | 0 | 0 | 0 | |
| M36 | - | 0 | 0 | 5 | 0 | 0 | 0 |