EN 14399-6 Plain Chamfered Washers (System HV)
EN 14399-6 plain chamfered washers for high-strength structural bolting, system HV — thread sizes M12 to M36 (parenthesised M14/M18 non-preferred), the hardened washer matched to EN 14399-4 HV bolts, with the collected hole/outside-diameter/thickness ladder and chamfer rows.
Last updated: 2026-11
Specifications
EN 14399-6 is the system-HV washer in the European structural bolting set — the companion to the EN 14399-4 large-head hex bolts already in this catalog, and the collected source states outright that it replaces DIN 6915. What the standard adds over a plain shop washer is the chamfer: the e and c rows in the ladder are the bearing-side chamfer that seats against the bolt head flange and the nut face without rocking, which is the whole point on a preloaded friction-grip joint. The collected ladder runs M12 → M36 with (M14)/(M18) parenthesised as non-preferred — order the preferred series unless the design already calls the parenthesised size. Hole and outside diameters carry min/max tolerances per size (the M36 washer, for example, bores 37–37.62 mm on a 66 mm maximum outside diameter), thickness 3 → 6 mm nominal across the range. Where the structure uses the HV-set washers against the heavy DIN 6914 / EN 14399-4 bolts, order the washer by the bolt's thread size off this table. Property class, hardness and finish are not tabulated by the collected specification — per RFQ (state the bolt set and coating system at quotation).
| Standard | EN 14399-6 — plain chamfered washers for high-strength structural bolting, system HV (replaces DIN 6915 per the collected source) |
|---|---|
| Size range | Thread M12 – M36, with (M14)/(M18) marked non-preferred in the source notation |
| Hole diameter | d: 13 – 37 mm min, 13.27 – 37.62 mm max across the ladder |
| Outside diameter | d c: 24 – 66 mm max (min/max per size in the table) |
| Thickness | h: 3 → 6 mm nominal, min/max per size as printed |
| Chamfer | e and c rows per size — bearing-side chamfer for HV head/nut seating |
| Property class / finish | Not tabulated by the collected specification — per RFQ (state the EN 14399 bolt set and any coating system at quotation) |
| Attribute | M12 | (M14) | M16 | (M18) |
|---|---|---|---|---|
| d — max | 13.27 | 15.27 | 17.27 | 19.33 |
| d — min | 13 | 15 | 17 | 19 |
| d c — max | 24 | 28 | 30 | 34 |
| d c — min | 23.48 | 27.48 | 29.48 | 33.38 |
| h — Nominal Size | 3 | 3 | 4 | 4 |
| h — max | 3.3 | 3.3 | 4.3 | 4.3 |
| min | 2.7 | 2.7 | 3.7 | 3.7 |
| e — min=nominal size | 0.5 | 0.5 | 0.75 | 0.75 |
| e — max | 1 | 1 | 1.5 | 1.5 |
| c — min | 1.6 | 1.6 | 1.6 | 2 |
| c — max | 1.9 | 1.9 | 1.9 | 2.5 |
- Row 7 (min): Continuation rows print only "max"/"min" without the parent attribute — the source renders the attribute label as a rowspan cell. Values here are the h (thickness) range, per the rowspan lineage.
- Row 1 (d — max): Parenthesised (M14)/(M18) headers are the source's non-preferred-size notation, carried verbatim.
| Attribute | M20 | M22 | M24 |
|---|---|---|---|
| d — max | 21.33 | 23.33 | 25.33 |
| d — min | 21 | 23 | 25 |
| d c — max | 37 | 39 | 44 |
| d c — min | 36.38 | 38.38 | 43.38 |
| h — Nominal Size | 4 | 4 | 4 |
| h — max | 4.3 | 4.3 | 4.3 |
| min | 3.7 | 3.7 | 3.7 |
| e — min=nominal size | 0.75 | 0.75 | 0.75 |
| e — max | 1.5 | 1.5 | 1.5 |
| c — min | 2 | 2 | 2 |
| c — max | 2.5 | 2.5 | 2.5 |
| Attribute | M27 | M30 | M36 |
|---|---|---|---|
| d — max | 28.52 | 31.62 | 37.62 |
| d — min | 28 | 31 | 37 |
| d c — max | 50 | 56 | 66 |
| d c — min | 49 | 54.8 | 64.8 |
| h — Nominal Size | 5 | 5 | 6 |
| h — max | 5.6 | 5.6 | 6.6 |
| min | 4.4 | 4.4 | 5.4 |
| e — min=nominal size | 1 | 1 | 1.25 |
| e — max | 2 | 2 | 2.5 |
| c — min | 2.5 | 2.5 | 2.5 |
| c — max | 3 | 3 | 3 |
Materials
- Material and hardness specified per RFQ — structural HV washers are hardened steel matched to the bolt set; the collected table does not tabulate class or coating, so state the assembly (EN 14399-4 bolts, galvanized or plain) at quotation
Ordering & documentation
Documents
Shipments are backed by Mill Test Certificate (MTC), Dimensional Report, Salt Spray Test Report on request, with full batch traceability from raw material to finished product. Quality management follows the owner-confirmed compliance list: ISO 9001:2015, RoHS, REACH. Exact document sets are confirmed on the order.
Quotation
- The fastener family (EN 14399-6 Plain Chamfered Washers (System HV)) plus the standard designation from your drawing — DIN / ISO / JIS / ASTM / ANSI, or a drawing for custom parts.
- Size (diameter and length), thread type (metric or inch), property class or grade, and coating or finish.
- Quantity per size and your target delivery date.
- Destination country, and any required documents (for example a mill test certificate) so the quote includes them.
Sample & supply
Minimum order quantity is 10,000 pieces. Stock items run 3–7 days. Quantities or variants outside the standard range are confirmed at quotation.
Storage & shipping
Parts are packed for export and shipped factory-direct to buyers in Europe, Asia, the Americas and the Middle East. Store fasteners dry and protected until installation, and keep coated parts in their packaging until use; specific packing and preservation requirements can be stated on the order and confirmed at quotation.
Frequently asked questions
EN 14399-6 or DIN 6915 — which washer designation do I order?
The same part to a superseded designation: the collected source states EN 14399-6 replaces DIN 6915, and this catalog carries both name lines so drawings from either era resolve. Read the dimension ladder by the bolt's thread size — hole, outside diameter, thickness and the chamfer rows are tabulated per size, and the (M14)/(M18) sizes are the source's non-preferred markers, so a drawing calling them up usually converts to M16/M20 neighbours unless the joint genuinely needs the intermediate step. What the table does not fix is property class and finish: HV-set washers are hardened and often galvanized with their bolts as a matched set, so name the bolt standard and coating on the RFQ and the pairing is confirmed at quotation.
Request a Quote
Get factory-direct pricing from the manufacturer.
What to include in your inquiry
- ✓ Standard and property class (e.g. DIN 912, ISO 4762, class 8.8) — or a drawing for custom parts.
- ✓ Sizes, lengths and thread type (metric or inch).
- ✓ Quantity per size and your target delivery date.
- ✓ Destination country, plus any coating or finish requirement.
- ✓ Any documents you need with the shipment (e.g. mill test certificate) so the quote includes them.
- ✓ Your inquiry goes straight to the factory team by email and gets a reply within 24 hours.
- ✓ Factory-direct pricing
- ✓ Standard and custom specifications
- ✓ Factory-direct export to buyers in Europe, Asia, the Americas and the Middle East
- ✓ Full fastener family support