Specification summary of ISO 2342 as applied to slotted headless screws with shank: the dimensions the standard controls, the full specified size range, and the equivalent DIN/ISO/ASME designations.
ISO 2342 — Scope
ISO 2342 is "Slotted headless screws with shank".
Material, property class, surface finish and packaging are governed by separate documents — ISO 898-1 and ISO 898-2 for mechanical property classes, ISO 4042 for electroplated finishes.
Tolerance & Product Grades
ISO 2342 does not divide slotted headless screws with shank 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 2342
| Size | Pitch P (mm) | b (mm) | d_s_min (mm) | d_s_max (mm) | n_nom (mm) | n_min (mm) | n_max (mm) | t_min (mm) | t_max (mm) | x_max (mm) | Length range l (mm) | Reference standard |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M1 | 0.25 | 1.2 | 0.86 | 1 | 0.2 | 0.26 | 0.4 | 0.63 | 0.78 | 0.6 | 2.5~4 | ISO 2342 |
| M1.2 | 0.25 | 1.4 | 1.06 | 1.2 | 0.25 | 0.31 | 0.45 | 0.63 | 0.79 | 0.6 | 3~5 | ISO 2342 |
| M1.6 | 0.35 | 1.9 | 1.46 | 1.6 | 0.3 | 0.36 | 0.5 | 0.88 | 1.06 | 0.9 | 4~6 | ISO 2342 |
| M2 | 0.4 | 2.4 | 1.86 | 2 | 0.3 | 0.36 | 0.5 | 1 | 1.2 | 1 | 5~8 | ISO 2342 |
| M2.5 | 0.45 | 3 | 2.36 | 2.5 | 0.4 | 0.46 | 0.6 | 1.1 | 1.33 | 1.1 | 5~10 | ISO 2342 |
| M3 | 0.5 | 3.6 | 2.86 | 3 | 0.5 | 0.56 | 0.7 | 1.25 | 1.5 | 1.25 | 6~12 | ISO 2342 |
| (M3.5) | 0.6 | 4.2 | 3.32 | 3.5 | 0.5 | 0.56 | 0.7 | 1.5 | 1.78 | 1.5 | ISO 2342 | |
| M4 | 0.7 | 4.8 | 3.82 | 4 | 0.6 | 0.66 | 0.8 | 1.75 | 2.05 | 1.75 | 8~14 | ISO 2342 |
| M5 | 0.8 | 6 | 4.82 | 5 | 0.8 | 0.86 | 1 | 2 | 2.35 | 2 | 10~20 | ISO 2342 |
| M6 | 1 | 7.2 | 5.82 | 6 | 1 | 1.06 | 1.2 | 2.5 | 2.9 | 2.5 | 12~25 | ISO 2342 |
| M8 | 1.25 | 9.6 | 7.78 | 8 | 1.2 | 1.26 | 1.51 | 3.1 | 3.6 | 3.2 | 14~30 | ISO 2342 |
| M10 | 1.5 | 12 | 9.78 | 10 | 1.6 | 1.66 | 1.91 | 3.75 | 4.25 | 3.8 | 16~35 | ISO 2342 |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Slotted Headless Screws with Shank page.
Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
When to Specify ISO 2342
Choose ISO 2342 for international engineering work and OEM supply where ISO standards are the contractual reference. It is the default modern specification for slotted headless screws with shank.
Custom manufacturing · Made to drawing
Need a screw to this standard in a non-standard size?
Parts built to ISO 2342 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 warm forging.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
