ISO 8736 Taper Pins with Internal Thread
ISO 8736 taper pins with internal thread d 6 to 20 — the taper-locked pin you can still extract from a blind hole, with the collected d2/t/f thread rows.
Last updated: 2026-11
Specifications
A taper pin wedges itself into a tapered bore and that wedge is the clamp — no nut, no elastic, pure geometry. But the same wedge fights extraction from a blind hole, which is why the large taper pins carry an internal thread: a puller screw threads into the pin's small end and backs it out. ISO 8736 is that designation; the collected rows cover d 6 – 20 with internal thread d2 (M 4 → M 12), thread depth t (6 → 18) and counterbore f (0,8 → 2,5). Where it earns its place over a parallel pin: repeated disassembly of heavy locators, jig feet, and any joint where the taper both locates and clamps — at the cost that the tapered bore must be reamed to the taper, which is shop work. The collected page tabulates the thread geometry only: taper rate, length ladder, material (these commonly run mild steel per the taper standard line) and finish are not on it — per RFQ. The external-thread counterpart (nut-end style) is ISO 8737, also in this catalog.
| Standard | ISO 8736 — taper pins with internal thread (puller-extractable taper lock) |
|---|---|
| Size range | d 6 – 20 in the collected rows |
| Internal thread | d2: M 4 (d 6) → M 12 (d 20); thread depth t: 6 → 18 |
| Counterbore | f: 0,8 → 2,5 |
| Not tabulated | Taper rate details, length ladder, material, finish — per RFQ |
| d | 6 | 8 | 10 | 12 | 14 | 16 | 20 |
|---|---|---|---|---|---|---|---|
| d2 | M 4 | M 5 | M 6 | M 8 | M 8 | M 10 | M 12 |
| t | 6 | 8 | 10 | 12 | 12 | 16 | 18 |
| f | 0,8 | 1 | 1,2 | 1,6 | 1,6 | 2 | 2,5 |
Materials
- Material and finish specified per RFQ — taper pins commonly run mild or medium-carbon steel with the bore reamed to the taper; state the blind-hole depth and puller access at quotation, since the internal-thread depth t must clear the boss
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 8736 Taper Pins with Internal Thread) 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
Internal-thread taper (ISO 8736) or external-thread taper (ISO 8737) — which extraction style fits my housing?
It is decided by what the back of the hole lets you reach. The internal-thread pin (this page) screws a puller into the pin itself: nothing protrudes beyond the bore mouth, so it suits blind holes and flush joints — but the thread weakens the pin's small end and the puller needs the bore's full length. The external-thread pin (ISO 8737, d 5 – 20 in this catalog) carries a threaded nut-end stub (d2 5,5 → 21,7 with d3 threads M 5 → M 16 and the L2 total-length row) that sticks out of the housing: you pull on a nut, and the joint tolerates the protrusion — typical on through-holes and external levers. Both wedge-locate the same way and both need a taper-reamed bore. The collected ISO 8736 rows cover d 6 – 20 with d2 M 4 → M 12 and thread depth t 6 → 18; lengths, taper-rate detail, material and finish are not tabulated on the captured page and are per 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