Full digital access and licensing information are available via the API Compass platform .
: Provides various overviews and "one-pagers" on changes between the 20th and 21st editions, such as this 21st Edition Overview . api specification 6a 21st edition pdf link
Specification for Wellhead and Tree Equipment Publication Date: November 2018 Monogram Effective Date: November 1, 2019 Full digital access and licensing information are available
(November 2024), which must be incorporated into quality management systems for continued compliance. Informational Previews 2019 (November 2024)
Once you purchase or access the official file, verify it against these fingerprints: