DIN 608 Flat Countersunk Square Neck Bolts (Short Square)
Flat countersunk square-neck (coach) bolts to DIN 608 — short square neck, tabulated at M10 and M12 in the collected ladder with head/shank/neck min-max rows and a single thread-length row per size.
Last updated: 2026-11
Specifications
DIN 608 is the short-square-neck counterpart to DIN 605: the same flat countersunk head seating flush in a countersunk hole, with a shorter square neck so the bolt suits thinner clamped packs — the neck finishes its anti-turn engagement before the countersink interferes in shallow material. The collected ladder is compact: M10 and M12, with min/max rows for head diameter d k (19.65 → 24.65 mm max), shank d s, the neck dimensions the source labels Fn and V (carried verbatim — the collected page prints no legend for those two labels), the radius r, and a single thread-length b row per size (26 mm at M10, 30 mm at M12 — no grip split on this table). Lengths are not tabulated — quote diameter × length off your drawing. For the M6–M10 long-square members of the family see the DIN 605 page in this catalog. Material, property class and finish are not printed by the source — per RFQ.
| Standard | DIN 608 — flat countersunk square neck bolts, short square |
|---|---|
| Size range | M10, M12 in the collected ladder |
| Head diameter | d k: 18.35 – 24.65 mm min/max across the ladder |
| Shank diameter | d s: min/max per size (9.42 – 10 mm at M10; 11.3 – 12 mm at M12) |
| Thread length | b: 26 mm (M10), 30 mm (M12) — single row, no grip split in the source |
| Neck dimensions | Fn / V rows carried verbatim (labels as printed, no legend on the collected page) |
| Lengths | Not tabulated by the collected specification — quote diameter × length per drawing |
| Material / finish | Not tabulated by the collected specification — per RFQ |
| Attribute | M10 | M12 |
|---|---|---|
| P — Pitch | 1.5 | 1.75 |
| b | 26 | 30 |
| d k — max | 19.65 | 24.65 |
| d k — min | 18.35 | 23.35 |
| d s — max | 10 | 12 |
| d s — min | 9.42 | 11.3 |
| Fn — max | 8.45 | 11.05 |
| Fn — min | 7.55 | 9.95 |
| r — max | 1.5 | 1.8 |
| V — max | 10.58 | 12.7 |
| V — min | 9.42 | 11.3 |
- Row 7 (Fn — max): The source labels two dimensions "Fn" and "V" without a legend defining them on the collected page — carried verbatim; disambiguate against DIN 608 itself.
- Row 2 (b): The source prints the b (thread length) row as a single value per size — no L-range split on this table.
Materials
- Material and finish specified per RFQ — state the joint (timber, clamp, general construction) and coating 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 608 Flat Countersunk Square Neck Bolts (Short Square)) 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
What are the "Fn" and "V" rows in the DIN 608 table?
They are the collected source's own column labels for the neck-region dimensions, printed without a defining legend on the page, so they are carried verbatim and flagged rather than renamed — we do not assign meanings the source does not state. Practically, the fitting figures with standard labels are the head diameter d k rows (cut the countersink to them) and the shank d s rows (drill the through-hole); read the Fn and V rows as the tabulated neck values exactly as printed. If your drawing dimensions the neck explicitly, match the drawn figures against both rows or confirm the neck callout on the RFQ.
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