Specification summary of ISO 4762 as applied to vented vacuum screws: the dimensions the standard controls, the full specified size range, and the equivalent DIN/ISO/ASME designations.
ISO 4762 — Scope
ISO 4762 is "Hexagon socket head cap screws". The metric socket cap screw; the closely related DIN 912 covers the same form.
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 4762 does not divide vented vacuum screws 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 4762
| Thread size | Pitch (mm) | Head diameter dk (mm) | Head height k (mm) | Hex socket s (mm) | Vent hole diameter (mm) | Common length range (mm) | Reference standard |
|---|
| M3 | 0.5 | 5.5 | 3.0 | 2.5 | 0.8 | 6~30 | ISO 4762 vented |
| M4 | 0.7 | 7.0 | 4.0 | 3 | 1.0 | 8~40 | ISO 4762 vented |
| M5 | 0.8 | 8.5 | 5.0 | 4 | 1.2 | 10~50 | ISO 4762 vented |
| M6 | 1.0 | 10.0 | 6.0 | 5 | 1.5 | 10~60 | ISO 4762 vented |
| M8 | 1.25 | 13.0 | 8.0 | 6 | 2.0 | 12~80 | ISO 4762 vented |
| M10 | 1.5 | 16.0 | 10.0 | 8 | 2.5 | 16~80 | ISO 4762 vented |
Equivalent Standards
ISO 4762 socket head cap screws correspond to DIN 912.
When to Specify ISO 4762
Choose ISO 4762 for international engineering work and OEM supply where ISO standards are the contractual reference. It is the default modern specification for vented vacuum screws.
Custom manufacturing · Made to drawing
Need a screw to this standard in a non-standard size?
Parts built to ISO 4762 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.
Custom screw manufacturingSend a drawing
Applications & Industries
Where Vented Vacuum Screws are used, and what decides the specification in each case. Stocked from M3 to M10.
Industries that specify Vented Vacuum Screws
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Maintenance & MRO
Stocked replacements matched to an existing property class, thread and finish.
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Food, pharma & cleanroom
Stainless assemblies that are washed down, where the finish matters as much as the strength.
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Machine building & OEM
The default fastener on production equipment: covers, brackets, motor mounts and sub-assemblies tightened to a specified torque.
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Automotive & transport
Chassis, driveline and body fixings that see vibration and are assembled to a controlled preload.
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Steel fabrication
Bolted connections in frames, enclosures, walkways and weldments, on the bench and on site.
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Energy & infrastructure
Tower, pipework, switchgear and plant fixings specified for long service life and inspectable joints.
Typical applications
- clamping two machined faces to a calculated preload
- bolting brackets, motors and gearboxes to a frame
- assemblies that are dismantled for service and re-torqued
- joints where the property class is stated on the drawing
Service conditions to specify against
- Marine and coastal
- Available in A4 (316) stainless for chloride exposure — coastal structures, pool halls, water treatment and deck hardware, where A2 will eventually pit.
- High load
- Supplied in ISO 898-1 property classes, so the joint can be designed to a stated proof load and tightened to a calculated torque rather than by feel.
- Torque and preload
- The joint is designed around bolt tension, so lubrication, coating and the friction coefficient all change the torque figure — state them together.
Where to use something else
- Do not use a machine thread into unthreaded sheet or timber; use a tapping screw, rivet nut or insert made for that parent material.
Full application guide: where Vented Vacuum Screws are used, how to specify them, and the cases they are wrong for
