SB002 Slotted Raised Countersunk Barrel Nuts
Slotted-drive raised countersunk barrel nuts (sex bolts) in M4–M8, with 90° countersunk heads, closed ends and head diameters 7–15 mm as tabulated. A1/303, A2/304 and A4/316 stainless; a traditional screwdriver-driven fixing for architectural work.
Last updated: 2026-11
Specifications
The slotted raised countersunk barrel nut pairs a conventional slotted drive with the flush-finish logic of the family: a 90° raised countersunk head over a closed-end female barrel, driven with an ordinary flat screwdriver. The collected tabulation covers M4 to M8, listing per-thread head diameters from 7 mm (M4) to 15 mm (M8) and barrel diameters from 5 mm to 10 mm; several threads appear in more than one variant column with differing head heights and lengths, so only the per-thread constants and clean sample cells are carried here. The source notes its head diameters differ slightly from DIN 964 raised countersunk screws — a useful caution when mixing this nut with a standard-specified mating screw, and one worth confirming against the drawing. Stainless is the standard supply: A1/303 free-machining grade, A4/316 for saltwater-grade corrosion resistance, and A2/304 in certain sizes. Architectural joinery, balustrade work and heritage-style fittings are its natural ground.
| Designation | SB002 — slotted raised countersunk barrel nut (female, internally threaded; closed end) |
|---|---|
| Thread range (tabulated) | M4, M5, M6, M8 |
| Head diameter dk per thread (mm) | M4 7 · M5 9 · M6 10 · M8 13–15 (per tabulated variant) |
| Barrel diameter d1 per thread (mm) | M4 5 · M5 6–6.5 (per tabulated variant) · M6 7.5 · M8 10 |
| Head height K (sample clean cells, mm) | M4 1.2–1.5 · M5 1.3–1.5 · M6 1.5 · M8 1.9–3 — varies per variant column |
| Lengths l1 (sample clean cells, mm) | M4 7–8 · M5 9 · M6 9 · M8 9–10 — varies per variant column |
| Head angle / drive | 90° raised countersunk head; standard slotted drive |
| Source caveat | Source notes head diameters differ slightly from DIN 964 raised countersunk screws |
| Materials (collected legend) | A1/303 stainless (standard), A4/316 stainless, A2/304 stainless in certain sizes |
| Typical applications | Architectural applications; clamps two or more pieces with a same-thread screw |
Materials
- A1 / 303 stainless steel
- A2 / 304 stainless steel (certain sizes)
- A4 / 316 stainless steel
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 (SB002 Slotted Raised Countersunk Barrel Nuts) 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
Can I pair this barrel nut with a standard DIN 964 raised countersunk screw?
Check the head first. The collected page states explicitly that these head diameters differ slightly from DIN 964 raised countersunk screws, so the countersink angle and flush line may not match a screw bought to the standard. Either take the mating screw from the same source series, or send both drawings to quotation and we confirm the flush fit before you commit.
Why do the tabulated values differ between columns of the same thread?
The source table lists more than one variant per thread — same thread and head diameter, but different head heights and lengths. We render the per-thread constants (head and barrel diameter) and a sample of the clean variant cells rather than guessing which column maps to which order code. Specify thread, overall length and material on the RFQ and the exact variant is confirmed at quotation.
What is the MOQ and lead time for this nut type?
The minimum order quantity is 10,000 pieces. Stock items ship in 3–7 days; non-stock items are confirmed at quotation. Common diameters in this nut type are widely stocked; confirm the exact schedule against quantity and size mix at quotation.
What should an RFQ for this nut type state?
State the designation (for example the barrel-nut SKU and head style), nominal thread size and pitch, overall barrel length or grip, material and finish (plain, zinc, or stainless where compatible), whether a through-hole or blind (closed) end barrel is required, the mating screw specification, required certificates, and quantity per size — plus destination country.
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