DIN 607 Cup Head Nib Bolts
DIN 607 cup head nib bolts, M8–M16 — the nib-driven counterpart of the carriage bolt: domed cup head, cylindrical grip with nibs against rotation, with the collected per-size tables: pitch, b ladder, d k, d s, g, i, k and r.
Last updated: 2026-11
Specifications
DIN 607 pairs the familiar domed cup head of the carriage bolt with the nib drive of DIN 604: two small nibs under the head key into the seating face and hold the bolt while the nut is run up, in a plain round hole. Compared with the square-neck DIN 603, the nib drive is gentler on thin or brittle outer plies and needs only drilled tooling; compared with its countersunk sibling DIN 604, the cup head stands proud and carries more bearing area — the choice where a flush seat is not required. The head radius r (≈ 8.9–15.8 in the collected tables) is what gives the carriage look and the snag-resistant profile on timber frames, racking and agricultural ironwork. The collected tables run M8 to M16: pitch, the three-regime thread-length b ladder (b 3 tabulated only from M16 — "/" below, see table footnote), head diameter d k, shank d s, nib width g, nib height i, head height k, head radius r and nib fillet r 2. Property classes and finishes stay per RFQ.
| Standard | DIN 607 — cup head nib bolts (domed head, two nibs against rotation) |
|---|---|
| Series | M8 – M16 (one source column group) |
| Tabulated geometry | Per size: pitch P, b ladder (L≤125 / 125<L≤200 / L>200, "/" at M8–M12 L>200), d k (max/min, 16.55–30.65), d s (max/min), nib width g (max/min), nib height i (min), k (max/min), head radius r (≈), nib fillet r 2 (max) |
| Head seat | Domed cup head standing proud — larger bearing area than the countersunk DIN 604; nibs key into the seating face in a plain round hole |
| Property classes / finishes | Not tabulated by the collected specification — per RFQ |
| Attribute | M8 | M10 | M12 | M16 |
|---|---|---|---|---|
| P — Pitch | 1.25 | 1.5 | 1.75 | 2 |
| b — L≤125 | 22 | 26 | 30 | 38 |
| 125＜L≤200 | 28 | 32 | 36 | 44 |
| L＞200 | / | / | / | 57 |
| d k — max | 16.55 | 19.65 | 24.65 | 30.65 |
| min | 15.45 | 18.35 | 23.35 | 29.35 |
| d s — max | 8 | 10 | 12 | 16 |
| min | 7.42 | 9.42 | 11.3 | 15.3 |
| g — max | 3 | 3.2 | 3.6 | 4.2 |
| min | 2.6 | 2.72 | 3.12 | 3.72 |
| i — min | 2.3 | 2.7 | 3.2 | 3.5 |
| k — max | 6.38 | 7.45 | 9.65 | 11.75 |
| min | 5.62 | 6.55 | 8.75 | 10.65 |
| r — ≈ | 8.9 | 10.5 | 13.3 | 15.8 |
| r 2 — max | 0.5 | 0.5 | 1 | 1 |
- Row 4 (L＞200): The source prints '/' at M8/M10/M12 for the L>200 regime — b 3 is tabulated only from M16.
Materials
- Material and finish specified per RFQ — hot-dip galvanized and stainless executions are common for outdoor timber and agricultural work; confirm 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 (DIN 607 Cup Head Nib Bolts) 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 1,000–10,000 pieces depending on size. Stock items run 3–7 days. High-strength and custom parts run 15–25 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
Where does a nib bolt beat a square-neck carriage bolt?
In the hole, and in the ply. The square neck of a DIN 603 carriage bolt needs a square hole to bite — it punches cleanly in timber but has to be machined in metal, and in thin sheet it distorts the ply. DIN 607's two nibs need only two shallow marks from a round drilled hole, so on steel chutes, sheet-metal cladding, racking and any retrofit where the outer ply cannot be punched square, the nib bolt installs with a drill and holds against torque just the same. The cup head keeps the carriage-bolt advantages: domed, snag-resistant, good bearing on soft faces, no exposed thread on the loaded side. The collected tables show the nib is a modest feature — nib width g 3–4.2 and height i 2.3–3.5 across M8–M16 — but it carries the full anti-rotation duty, so the seating face material matters: hard steels take the nib marks fine, and soft plastics or laminates may want the DIN 604 countersunk form or a toothed washer instead. Confirm the finish for the environment at RFQ.
What is the MOQ and lead time for this bolt type?
The minimum order quantity is 1,000–10,000 pieces depending on size. Stock items ship in 3–7 days; high-strength and custom parts in 15–25 days. Common sizes in this bolt type are widely stocked; confirm the exact schedule against quantity and size mix at quotation.
Related knowledge
- What Bolt Property Classes 8.8, 10.9 and 12.9 Encode — and When High Strength Stops Being the Right Choice
- Bolt Grade Selection: ISO 898-1 8.8/10.9/12.9 vs ASTM A307 and A325
- 8.8 vs 10.9 vs 12.9 Bolts: Strength, Hardness and Cost — What the Evidence Settles
- Calculating Bolt Preload and Clamp Force: Torque, Friction and Tightening Method
- How to Determine Tightening Torque and Choose a Tightening Method for a Bolted Joint
- Fastener Failure Modes: Which Fatigue, Creep and SCC Controls the Evidence Supports
- Hydrogen Embrittlement in High-Strength Bolts: Which Grades Need Controls, Which Coatings and Baking Schedules Are Acceptable, and What to Require Before the RFQ
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