Material: HDG steel per ASTM A123/A153 CSA G164
CSA standard C83-96 and CSA 83.66-96 specification
Add suffix "C" to part # for Charpy Level 1 Impact - Average minimum energy absorption of 20J when tested at -20 degrees C 
Add suffix "C15" to part # for Charpy Level 1.5 Impact - Average minimum energy absorption of 27J when tested at -30 degrees C 
per ASTM A370

Suggested Alternative: Use combination of Machine Bolt and D-eye (eyelet) to achieve the same function