ISO 8737 Taper Pins with External Thread
ISO 8737 taper pins with external thread d 5 to 20 — the nut-end taper pin with a pullable threaded boss, with the collected d2/d3/b/L2 rows.
Last updated: 2026-11
Specifications
The external-thread taper pin solves the extraction problem from the other end: instead of a blind internal thread, the pin carries a threaded stub boss past its large end, so a nut on that boss draws the taper out of the bore — no puller screw into the pin body, and the joint is serviceable from outside the housing. The collected rows cover d 5 – 20 with nut-end diameter d2 (5,5 → 21,7), external thread d3 (M 5 → M 16, repeating at the top per the source), thread length b (14 → 35) and total length L2 (25 → 85). Where it belongs: jig feet, locating levers, and any taper joint where periodic pull-out is planned and a protruding boss is acceptable (or wanted — the boss doubles as a grip point). The internal-thread flush alternative is ISO 8736, also in this catalog. Lengths beyond L2, taper-rate detail, material and finish are not tabulated by the collected page — per RFQ.
| Standard | ISO 8737 — taper pins with external thread (nut-end pullable taper lock) |
|---|---|
| Size range | d 5 – 20 in the collected rows |
| Threaded boss | d2 (nut-end diameter): 5,5 → 21,7; d3 (external thread): M 5 → M 16 (repeats at the top per the source) |
| Thread length | b: 14 → 35 |
| Total length | L2: 25 → 85 |
| Not tabulated | Lengths beyond L2, taper-rate detail, material, finish — per RFQ |
| 5 | 6 | 8 | 10 | 12 | 16 | 20 | |
|---|---|---|---|---|---|---|---|
| d2 | 5,5 | 6,6 | 8,8 | 10,9 | 13,1 | 17,4 | 21,7 |
| d3 | M 5 | M 6 | M 8 | M 10 | M 12 | M 16 | M 16 |
| b | 14 | 18 | 22 | 24 | 27 | 35 | 35 |
| L2 | 25 | 30 | 40 | 45 | 55 | 72 | 85 |
Materials
- Material and finish specified per RFQ — nut-end taper pins commonly run medium-carbon steel; state the housing boss depth and whether the nut-end must sit flush or proud at quotation, since L2 fixes the protrusion
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 8737 Taper Pins with External 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
Why does the thread column repeat (M 16 at both d 16 and d 20) on this page?
That is how the collected page prints it, and it is carried verbatim rather than interpolated: the source's d3 external-thread row shows M 5, M 6, M 8, M 10, M 12, M 16 and then M 16 again at d 20 — the largest pin keeps the M 16 boss per the capture rather than stepping to a larger thread. Practical consequences: a d 20 pin's nut-end boss is the same M 16 as the d 16 pin, so puller nuts and tapped pull-plates interchange across those two sizes; but if your drawing expects a larger boss at d 20, confirm per RFQ before ordering — this batch does not normalize source repeats into a ladder. The rest of the collected rows step cleanly: nut-end diameter d2 5,5 → 21,7, thread length b 14 → 35, total length L2 25 → 85. Lengths, taper detail, material and finish beyond these rows are per RFQ, and the flush-bore alternative remains ISO 8736 in this catalog if a protruding boss does not fit your joint.
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