ISO 8735 is the standard cited for internally threaded dowel pins (iso 8735). This page sets out what the standard controls for this part, reproduces the dimensional table supplied against it, and notes the related designations referenced on drawings.
ISO 8735 — Scope
ISO 8735 is "Parallel pins with internal thread, hardened".
Tolerance & Product Grades
ISO 8735 does not divide internally threaded dowel pins (iso 8735) into product grades. Tolerances are given as limits on the individual dimensions in the table.
Where a general-tolerance class is cited on the drawing instead, it applies to the dimensions not otherwise toleranced.
Dimensions Specified by ISO 8735
| Pin diameter d m6 (mm) | Internal thread | Thread depth (mm) | Hole H7 (mm) | Common length range (mm) | Hardness (HRC) | Extraction | Reference standard |
|---|---|---|---|---|---|---|---|
| 6 | M4 | 10 | 6 | 16~60 | 58-62 | Threaded puller | ISO 8735 |
| 8 | M5 | 12 | 8 | 20~80 | 58-62 | Threaded puller | ISO 8735 |
| 10 | M6 | 16 | 10 | 24~100 | 58-62 | Threaded puller | ISO 8735 |
| 12 | M6 | 20 | 12 | 26~120 | 58-62 | Threaded puller | ISO 8735 |
| 16 | M8 | 25 | 16 | 30~160 | 58-62 | Threaded puller | ISO 8735 |
| 20 | M10 | 28 | 20 | 40~200 | 58-62 | Threaded puller | ISO 8735 |
Companion Standards
ISO 8735 controls the geometry of internally threaded dowel pins (iso 8735). Surface finish is governed by separate finish standards such as ISO 4042 for electroplating, and corrosion testing by ISO 9227 (neutral salt spray). Mechanical performance is set by the documents specific to this part family — ISO 898-1 and ISO 898-2 apply to bolts, screws, studs and nuts, and not here.
When to Specify ISO 8735
Choose ISO 8735 for international engineering work and OEM supply where ISO standards are the contractual reference. It is the default modern specification for internally threaded dowel pins (iso 8735).
Custom manufacturing · Made to drawing
Need a pin to this standard in a non-standard size?
Parts built to ISO 8735 are already in the catalog, so a special is usually a variation on existing tooling rather than a new design — which is what keeps the cost down. Made by cold heading or turning.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
