Description
ISO 4017 Hexagon Head Screw M4x30-A4 — BOLTON SKU 56543.
About the ISO 4017 Hexagon Head Screw M4x30-A4
Supplied here is an ISO 4017 Hexagon Head Screw M4x30-A4: a small fully threaded hexagon-head screw with an M4 × 0.7 coarse thread, 30 mm nominal length, in A4 (316-type) stainless steel. ISO 4017’s M4 dimensions give a 7 mm width across flats and a 2.8 mm nominal head height, so the screw is turned with compact 7 mm tooling. A continuous thread over the full 30 mm suits clamping through slotted or oversized holes into nuts, channel nuts and tapped parts at varying grip lengths, without worrying about where a plain shank would land in the joint. The A4 grade carries the corrosion margin needed for exterior electrical fittings, instrumentation mounts and wet-area equipment where the standard A2 grade would be marginal against chloride pitting.
Key specifications
| Standard | ISO 4017 |
|---|---|
| Thread | M4, coarse (0.7 mm pitch) |
| Nominal length | 30 mm |
| Thread coverage | Fully threaded (per ISO 4017) |
| Width across flats | 7 mm |
| Head height | 2.8 mm nominal |
| Material | A4 (316-type) austenitic stainless steel |
Typical applications
The long-for-diameter 30 mm length fastens through deep or stacked M4 joints — mounting feet, sensor brackets, laminated panels — into nuts or tapped strips. In A4 it serves exterior instrumentation and fittings installed around water or coastal air.
Supplied by BOLTON Technical Equipment Supplies against request for quotation. Add this item to your RFQ basket to request pricing, lead time and documentation requirements (e.g. CoC, datasheets or test reports where applicable).
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