ASME B1.1 Unified inch threads UNC/UNF
CurrentLatest edition found. Still confirm amendments with the publisher.
- Edition
- ASME B1.1 2024
- Publisher
- ASME
- Part family
- Fasteners & threads
- Reviewed
- 23 October 2026 · source checked
Is ASME B1.1 still current?
Yes. ASME B1.1 2024 is the latest edition MechAtlas found (MechAtlas review: 23 October 2026). Check the publisher for amendments before you specify it.
What it covers
Unified inch threads UNC/UNF
Parts that use ASME B1.1
- Metric screw thread (USA (ASME / ASTM), related)
The standard 60-degree metric thread (M) used on bolts, nuts and tapped holes.
5/8-11 UNC-2A
Grades: Classes 1A/2A/3A
Unified inch threads; not metric.
Official source
MechAtlas does not reproduce standards. Check the official edition at the publisher's page for ASME B1.1 or the ASME store.
Open in MechAtlasCheck a drawing callout
Other fasteners & threads standards
- DIN 125-1 Replaced
Washers, product grade A, up to 250 HV - DIN 1481 Replaced
Heavy spring pins (old) - DIN 2999-1 Replaced
Whitworth pipe threads (old) - DIN 6325 Replaced
Hardened parallel pins m6 (old) - DIN 6914 Replaced
HV hex bolts for steel structures (old) - DIN 7 Replaced
Parallel pins (old) - DIN 7337 Replaced
Break mandrel blind rivets (old) - DIN 7991 Replaced
Hexagon socket countersunk head screws - DIN 9021 Replaced
Washers, outside diameter about 3 x thread - DIN 912 Replaced
Hexagon socket head cap screws (ISO 4762 modified) - DIN 913 Replaced
Hexagon socket set screws, flat point (ISO 4026 modified) - DIN 916 Replaced
Hexagon socket set screws, cup point (ISO 4029 modified)