At Ananka Fasteners Pvt Ltd, we manufacture fasteners to the dimensional requirements of DIN 93. DIN 93 covers tab (locking) washers with one long external tab. The tab is bent up against a flat of the nut or bolt head and the bore edge or a second tab is bent down against the workpiece to prevent rotation, providing a positive mechanical lock against loosening.
DIN 93 covers tab (locking) washers with one long external tab. The tab is bent up against a flat of the nut or bolt head and the bore edge or a second tab is bent down against the workpiece to prevent rotation, providing a positive mechanical lock against loosening.
Tab washer with one long tab (external nose)
Key dimensions for common sizes are listed below.
| Bolt Size | Hole Dia d (mm) | Outer Dia D (mm) | Thickness h (mm) | Tab Width B (mm) | Tab Length L (mm) |
|---|---|---|---|---|---|
| M5 | 5.3 | 17 | 0.5 | 6 | 16 |
| M6 | 6.4 | 19 | 0.5 | 7 | 18 |
| M8 | 8.4 | 22 | 0.75 | 8 | 20 |
| M10 | 10.5 | 26 | 0.75 | 10 | 22 |
| M12 | 13 | 30 | 1.0 | 12 | 28 |
| M14 | 15 | 33 | 1.0 | 12 | 28 |
| M16 | 17 | 36 | 1.0 | 15 | 32 |
| M18 | 19 | 40 | 1.0 | 18 | 36 |
| M20 | 21 | 42 | 1.0 | 18 | 36 |
N/A – tab washer (clearance bore)
Related and equivalent standards include DIN 462 (internal tab washer), DIN 463 (tab washer with two tabs) and DIN 432 (external tab washer).
For the official DIN standards catalogue, see the DIN standards listing. This external reference is provided for standards identification; the purchaser should verify the current edition applicable to the order.
We produce DIN 93 fasteners in carbon and alloy steel, austenitic and duplex stainless, and high-nickel, titanium and copper alloys — for structural, machinery and process applications worldwide.
For technical documentation and quotations, buyers can also review the Ananka Fasteners manufacturing and supply range or contact the team through the fastener enquiry and technical support page.
Ananka Fasteners supplies every lot with full material traceability and third-party testing on request.
DIN 93 covers tab (locking) washers with one long external tab. The tab is bent up against a flat of the nut or bolt head and the bore edge or a second tab is bent down against the workpiece to prevent rotation, providing a positive mechanical lock against loosening.
Ananka Fasteners manufactures DIN 93 in sizes from M5–M20. See the Dimensional Table above for the complete size breakdown.
N/A – tab washer (clearance bore)
We produce DIN 93 fasteners in carbon and alloy steel, austenitic and duplex stainless, and high-nickel, titanium and copper alloys — for structural, machinery and process applications worldwide.
Yes. For a quotation, provide the required nominal size, material grade, quantity and any inspection or certificate requirements.
Need a fastener manufactured to DIN 93 for an industrial project? Send the required fastener type, size, material grade, quantity and certification requirements to Ananka Fasteners. Our team can review the requirement and provide technical and commercial information for standard or custom configurations.
Recommended RFQ details: DIN 93 requirement, nominal size, material grade, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Dimensions compiled per DIN 93 and industry references; provided for reference only — confirm against the current edition of the standard before design use.
