ISO 7416 Washers for HV Connections
ISO 7416 round plates for high-strength structural (HV) connections, nominal sizes 13 to 37 for threads M12 to M36 — hole, outside diameter, thickness, chamfer and mass per 1000 pieces in one clean 8-row ladder.
Last updated: 2026-11
Specifications
The HV structural line pairs its heavy bolt with a hardened, chamfered plate that spreads the preload without brinelling the girder flange — the source titles the designation "Slices, round, for HV connections", which is its rendering of exactly that part. The collected ladder is the compact one for this batch: eight nominal sizes, keyed by washer nominal size and the matching thread (13/M12 up to 37/M36), each with the hole d1 (min. = nominal size, max. +0,27 to +0,62), the outside diameter d2 (max. = nominal size, min. −0,52 to −1,2), thickness h with its max./min. envelope (3+0,3/−0,3 at the small end to 6+0,6/−0,6), the chamfer c pair, the e edge reference, and the mass per 1000 pieces (7,03 kg → 115 kg). Where it sits in the catalog: the EN 14399-6 HV washer page covers the EN designation; this page carries ISO 7416 itself — order by the standard your drawing names, and match the bolt from the ISO 7411 ladder in this catalog. Hardness, finish and sizes beyond nominal 37 are not on the collected page — per RFQ; lead time, MOQ and pricing: contact for confirmation.
| Standard | ISO 7416 — round plates for high-strength (HV) connections |
|---|---|
| Size range | nominal 13 – 37, for threads M12 – M36 in the collected rows |
| Hole (d1) | min. = nominal size; max. 13,27 → 37,62 |
| Outside diameter (d2) | max. = nominal size; min. 23,48 → 64,8 |
| Thickness (h) | nominal 3 → 6 with max./min. envelope as printed |
| Mass | 7,03 → 115 kg per 1000 pieces |
| Not tabulated | Hardness, material, finish, sizes beyond nominal 37 — per RFQ; lead time, MOQ and pricing: contact for confirmation |
| Designation note | EN 14399-6 HV washers are a separate designation already in this catalog — order by drawing designation |
| Nominal size | for thread | d1 min.= nominal size | d1 max. | d2 max.=nominal size | d2 min. | h nominal size | h max. | h min. | c min.= nominal size | c max. | e approx. | weight kg/1000 pcs |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 13 | M12 | 13 | 13,27 | 24 | 23,48 | 3 | 3,3 | 2,7 | 1,6 | 1,9 | 0,5 | 7,03 |
| 17 | M16 | 17 | 17,27 | 30 | 29,48 | 4 | 4,3 | 3,7 | 1,6 | 1,9 | 1 | 14,6 |
| 21 | M20 | 21 | 21,33 | 37 | 36,38 | 4 | 4,3 | 3,7 | 2 | 2,5 | 1 | 19,6 |
| 23 | M22 | 23 | 23,33 | 39 | 38,38 | 4 | 4,3 | 3,7 | 2 | 2,5 | 1 | 24,3 |
| 25 | M24 | 25 | 25,33 | 44 | 43,38 | 4 | 4,3 | 3,7 | 2 | 2,5 | 1 | 30,6 |
| 28 | M27 | 28 | 28,52 | 50 | 49 | 5 | 5,6 | 4,4 | 2,5 | 3 | 1 | 50,2 |
| 31 | M30 | 31 | 31,62 | 56 | 54,8 | 5 | 5,6 | 4,4 | 2,5 | 3 | 1 | 63,2 |
| 37 | M36 | 37 | 37,62 | 66 | 64,8 | 6 | 6,6 | 5,4 | 3 | 3,5 | 1,5 | 115 |
- Row 8 (37): e at nominal size 37 prints 1,5 against 0,5 / 1 at the smaller sizes — the source's step as printed, carried verbatim.
Materials
- Material and finish specified per RFQ — HV washer plates are ordered matched to the bolt assembly (see the ISO 7411 page) with the hardness class and lubrication the tensioning method requires; state the bolt designation and the connection design standard 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 (ISO 7416 Washers for HV Connections) 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
The source page says "Slices, round, for HV connections" — is this a washer, and how does it differ from the EN 14399-6 HV washer page?
Yes — "slices" is the source's rendering of the flat circular plate the rest of the industry calls an HV washer; the tabulated columns (d1, d2, h, c, e, mass per 1000) are washer geometry through and through. The difference from the EN 14399-6 page is the designation, not the part family: EN 14399-6 specifies its own hardened washer system inside the EN 14399 assembly rules, while ISO 7416 is the ISO letter of the same role, and the two carry their own dimension tables — this page is quoted for ISO 7416 drawings. Two reading notes from the collected grid: the d1 minimum is printed as equal to the nominal size (the clearance comes in at the d1 max., +0,27 to +0,62 depending on size), and d2 runs the opposite way (max. = nominal, min. below it), so a "24 mm" plate is nominally d2 44, not 24 — pick rows by the "for thread" column (M12–M36), which is what a drawing actually names.
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