Assembly identity before dimensions
EN 14399-8:2018 identifies System HV hexagon fit bolt and nut assemblies for preloading. The German catalogue adoption is DIN EN 14399-8:2019-06; that national publication date does not change the EN edition to 2019. These references identify a family, not FastenerBridge product qualification.
Fit shank and mating hole
The form has an external hexagon head, a smooth cylindrical fit shank and a distinct threaded end with a transition region. A nominal thread diameter does not define the fit shank or the mating hole. Ordinary heavy-hex bolts are not automatically substitutes for this form.
Provide the controlled shank diameter and tolerance, fit length, hole requirements, thread region and transition clearance as separate drawing fields. Do not infer a clearance or interference fit, installation method or permissible load from the illustration.
Matching components and project review
Identify the complete assembly reference, revision, bolt and nut requirements, any required washers, finish and order-specific documentation. Keep HR, HV, ASTM and drawing-defined requirements distinct. Components from different systems or makers are not assumed interchangeable.
Enquiry fields
| Field | Provide for review |
|---|---|
| Reference | Exact assembly designation, edition and approved project specification. |
| Geometry | Controlled drawing, length datum, head, shank, thread and mating-part requirements. |
| Components | Bolt, nut and any washer requirements as a defined assembly. |
| Order | Quantity with units, destination, finish, identification and required reports. |
Selection boundaries
No dimensions, tolerances, tightening torque, preload, working load, tool compatibility or installation procedure are prescribed here. The illustration is not a scaled drawing. Supply, conformity and documentation require order-specific confirmation; a standard catalogue entry does not certify a supplied assembly.
Source identities and limitations
Manufacturer drawings were checked for form only. No numerical dimension or tolerance table is reproduced. Final requirements follow the agreed controlled drawing and project specification.