The table below lists the dimensions catalogued for grade 5 unf fine-thread hex nuts under ASTM A563. The scope of ASTM A563 itself is not summarised here — where a figure matters, confirm it against the published document.
ASTM A563 — Scope
The table below lists the dimensions catalogued for grade 5 unf fine-thread hex nuts under ASTM A563. The scope of ASTM A563 itself is not summarised here — where a figure matters, confirm it against the published document.
Tolerance & Product Grades
Product grade is a concept from dimensional fastener standards and does not apply to ASTM A563. Tolerances for this part are the limits shown against each dimension in the table.
Dimensions Specified by ASTM A563
| Thread series | Material | Mating bolt grades | Finish options | Governing standards |
|---|---|---|---|---|
| UNF fine | medium carbon steel | Grade 5 or Grade 8 hex bolts | zinc plating or black oxide | ASME B18.2.2 / ASTM A563 |
| UNF fine | medium carbon steel | Grade 5 hex bolts | zinc plating | ASME B1.1 thread form |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Grade 5 UNF Fine-Thread Hex Nuts page.
Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
Companion Standards
A complete specification for grade 5 unf fine-thread hex nuts normally cites several documents: one for the geometry, one for the material or mechanical properties, and one for the finish. ASTM A563 is one of them, not all of them.
Custom manufacturing · Made to drawing
Need a nut to this standard in a non-standard size?
Parts built to ASTM A563 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 tapping.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
