ISO 8744 Grooved Pins, Full-Length Taper-Grooved
ISO 8744 full-length taper-grooved pins, d1 1,5 to 25 over a 32-length ladder (l 8 to 200) — grooves that deepen toward one end, giving a wedged drive-in for soft or thick hosts.
Last updated: 2026-11
Specifications
Where the parallel grooves displace material evenly, the taper-grooved pin drives in with a wedge: the three grooves deepen continuously along the shank, so the pin enters at low force and ends at high interference — an increasingly tight seat from drive-in start to seat-bottom. That gradient suits soft hosts (aluminium, plastics) where parallel grooves can strip, and thick stacked joints where the wedge takes up tolerance across the stack. The collected table runs d1 1,5 → 25 (tolerance h9 at 1,5, h11 from 10) with chamfer a 0,2 → 3, over a 32-length ladder l 8 → 200 with groove diameters 1,63 → 25,6 banded +0,05 / ±0,05 / ±0,1. One verbatim quirk to note before quoting: the source's double-shear row is non-monotone at the top — it prints 444 | 283 | 444 across d1 12 / 16 / 20 — carried as printed, so confirm large-diameter shear values per RFQ. Groove-taper rate, material and finish are not tabulated — per RFQ.
| Standard | ISO 8744 — grooved pins, full-length taper-grooved |
|---|---|
| Size range | d1 1,5 – 25 in the collected rows; tolerance h9 (1,5) / h11 (from 10) per the source banding |
| Chamfer | a: 0,2 → 3 |
| Double shear | 4,4 → 444 kN; non-monotone 444 | 283 | 444 at d1 12 / 16 / 20 per the source — confirm large sizes per RFQ |
| Length ladder | l 8 – 200 (32 lengths) with groove diameter per length, 1,63 → 25,6 |
| Not tabulated | Taper rate, material, hardness, finish — per RFQ |
| Row label | 1,5 | 2 | 2,5 | 3 | 4 | 5 | 6 | 8 | 10 | 12 | 16 | 20 | 25 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| d1 Nominal | 1,5 | 2 | 2,5 | 3 | 4 | 5 | 6 | 8 | 10 | 12 | 16 | 20 | 25 |
| tolerance | h9 | h11 | |||||||||||
| a = | 0,2 | 0,25 | 0,3 | 0,4 | 0,5 | 0,63 | 0,8 | 1 | 1,2 | 1,6 | 2 | 2,5 | 3 |
| The smallest cutting force two sections kN | 4,4 | 6,4 | 11,3 | 17,6 | 25,4 | 45,2 | 70,4 | 101,8 | 181 | 283 | 444 | 283 | 444 |
- Row 4 (The smallest cutting force two sections kN): the force row is non-monotone at the top per the source: it prints 444 | 283 | 444 across d1 12 / 16 / 20 instead of a continuing ladder. Carried verbatim, not normalized - confirm the large-diameter double-shear values per RFQ.
| l Nominal | l min. | l max. | d1 1,5 | d1 2 | d1 2,5 | d1 3 | d1 4 | d1 5 | d1 6 | d1 8 | d1 10 | d1 12 | d1 16 | d1 20 | d1 25 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 8 | 7,75 | 8,25 | 1,63 | 2,15 | 2,7 | 3,25 | 4,3 | 5,3 | |||||||
| 10 | 9,75 | 10,25 | 1,63 | 2,15 | 2,7 | 3,3 | 4,3 | 5,3 | 6,3 | ||||||
| 12 | 11,5 | 12,5 | 1,6 | 2,15 | 2,7 | 3,3 | 4,35 | 5,3 | 6,3 | 8,35 | |||||
| 14 | 13,5 | 14,5 | 1,6 | 2,15 | 2,7 | 3,3 | 4,35 | 5,35 | 6,35 | 8,35 | 10,4 | 12,4 | |||
| 16 | 15,5 | 16,5 | 1,6 | 2,15 | 2,7 | 3,3 | 4,35 | 5,35 | 6,35 | 8,35 | 10,4 | 12,4 | |||
| 18 | 17,5 | 18,5 | 1,6 | 2,15 | 2,65 | 3,25 | 4,35 | 5,35 | 6,35 | 8,4 | 10,4 | 12,4 | |||
| 20 | 19,5 | 20,5 | 1,6 | 2,15 | 2,65 | 3,25 | 4,35 | 5,35 | 6,35 | 8,4 | 10,4 | 12,4 | |||
| 22 | 21,5 | 22,5 | 2,15 | 2,65 | 3,25 | 4,3 | 5,3 | 6,35 | 8,4 | 10,45 | 12,45 | ||||
| 24 | 23,5 | 24,5 | 2,15 | 2,65 | 3,25 | 4,3 | 5,3 | 6,35 | 8,4 | 10,45 | 12,45 | 16,55 | |||
| 26 | 25,5 | 26,5 | 2,15 | 2,65 | 3,2 | 4,3 | 5,3 | 6,35 | 8,4 | 10,45 | 12,45 | 16,6 | 20,6 | 25,6 | |
| 28 | 27,5 | 28,5 | 2,15 | 2,65 | 3,2 | 4,3 | 5,3 | 6,35 | 8,4 | 10,45 | 12,45 | 16,6 | 20,6 | 25,6 | |
| 30 | 29,5 | 30,5 | 2,15 | 2,65 | 3,2 | 4,3 | 5,3 | 6,35 | 8,4 | 10,45 | 12,45 | 16,6 | 20,6 | 25,6 | |
| 32 | 31,5 | 32,5 | 3,2 | 4,3 | 5,3 | 6,3 | 8,35 | 10,45 | 12,45 | 16,6 | 20,6 | 25,6 | |||
| 35 | 34,5 | 35,5 | 3,2 | 4,3 | 5,3 | 6,3 | 8,35 | 10,45 | 12,45 | 16,6 | 20,6 | 25,6 | |||
| 40 | 39,5 | 40,5 | 3,2 | 4,25 | 5,3 | 6,3 | 8,35 | 10,45 | 12,45 | 16,6 | 20,6 | 25,6 | |||
| 45 | 44,5 | 45,5 | 4,25 | 5,25 | 6,3 | 8,35 | 10,4 | 12,4 | 16,6 | 20,6 | 25,6 | ||||
| 50 | 49,5 | 50,5 | 4,25 | 5,25 | 6,3 | 8,35 | 10,4 | 12,4 | 16,6 | 20,6 | 25,6 | ||||
| 55 | 54,25 | 55,75 | 4,25 | 5,25 | 6,25 | 8,35 | 10,4 | 12,4 | 16,55 | 20,6 | 25,6 | ||||
| 60 | 59,25 | 60,75 | 4,25 | 5,25 | 6,25 | 8,3 | 10,4 | 12,4 | 16,55 | 20,6 | 25,6 | ||||
| 65 | 64,25 | 65,75 | 6,25 | 8,3 | 10,35 | 12,4 | 16,55 | 20,6 | 25,6 | ||||||
| 70 | 69,25 | 70,75 | 6,25 | 8,3 | 10,35 | 12,3 | 16,55 | 20,6 | 25,6 | ||||||
| 75 | 74,25 | 75,75 | 6,25 | 8,3 | 10,35 | 12,3 | 16,55 | 20,6 | 25,6 | ||||||
| 80 | 79,25 | 80,75 | 6,25 | 8,3 | 10,35 | 12,3 | 16,55 | 20,6 | 25,6 | ||||||
| 85 | 84,25 | 85,75 | 8,25 | 10,35 | 12,3 | 16,55 | 20,6 | 25,6 | |||||||
| 90 | 89,25 | 90,75 | 8,25 | 10,35 | 12,3 | 16,55 | 20,6 | 25,6 | |||||||
| 95 | 94,25 | 95,75 | 8,25 | 10,35 | 12,3 | 16,5 | 20,6 | 25,6 | |||||||
| 100 | 99,25 | 100,75 | 8,25 | 10,35 | 12,3 | 16,5 | 20,6 | 25,6 | |||||||
| 120 | 119,25 | 120,75 | 10,3 | 12,3 | 16,5 | 20,6 | 25,6 | ||||||||
| 140 | 139,25 | 140,75 | 10,4 | 12,5 | 16,5 | 20,5 | 25,5 | ||||||||
| 160 | 159,25 | 160,75 | 10,4 | 12,5 | 16,5 | 20,5 | 25,5 | ||||||||
| 180 | 179,25 | 180,75 | 12,5 | 16,5 | 20,5 | 25,5 | |||||||||
| 200 | 199,25 | 200,75 | 12,5 | 16,5 | 20,5 | 25,5 |
Materials
- Material and finish specified per RFQ — taper-grooved pins commonly run spring or hardened steel; the wedge action makes them a frequent pick for aluminium and plastic housings where parallel grooves risk stripping the host. State host material and stack thickness at quotation — the taper's take-up is what absorbs stack tolerance
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 8744 Grooved Pins, Full-Length Taper-Grooved) 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 quantities and lead times for this family are confirmed at quotation — send your sizes, grades and quantities on the RFQ and the quote will carry a firm schedule. Sample availability is confirmed with the 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
Why does the double-shear value go 444, then 283, then back to 444 at the top diameters?
That is how the collected page prints the row, and it is carried verbatim rather than smoothed: across d1 12 / 16 / 20 the table shows 444 kN, then 283 kN, then 444 kN again, before continuing upward at d1 25. The surrounding ladder steps cleanly (4,4 kN at d1 1,5 up through 101,8 and 181), so the dip-and-return sits exactly where a decimal-comma transcription slip would live in a source of this kind — but this batch does not normalize source anomalies, it flags them. The practical rule is the one the anomaly flag states: for d1 12 – 20 joints loaded near the shear limit, confirm the double-shear value per RFQ instead of quoting the printed 283. Everything else on the page steps monotonically: chamfer a 0,2 → 3, groove diameters 1,63 → 25,6 across the 32-length ladder l 8 – 200, so size selection and drive-fit planning can proceed normally while the shear question is confirmed.
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