Short answer — the primary U.S. and international safety standards that govern common rigging hardware (shackles, hooks, eyebolts, hoist rings, etc.) and the essential safety requirements you should follow are:

Key standards (U.S. / international)

• ASME B30.26 — Rigging Hardware (covers shackles, eyebolts, hoist rings, links, turnbuckles, wire‑rope clips, wedge sockets, etc.). (ASME.org)
• ASME B30.10 — Hooks (fabrication, use, inspection and maintenance of lifting hooks). (webstore.ANSI.org)
• OSHA guidance / regulatory requirements (general safe working load, testing, inspection, prohibition on bent/sprung hooks, etc.; see OSHA shipyards/eTool and applicable 29 CFR citations). (OSHA.gov)
• EN/ISO standards commonly cited internationally for specific components:
  • EN 13889 — Forged steel shackles for lifting (requirements, marking, use). (EVS.ee)
  • EN 1677 (parts) — Components for slings (forged hooks, grade requirements, testing, marking). (intertekinform.com)
  • ISO 3266 — Forged steel eyebolts (dimensions, grade, use for axial/inclined loading). (ISO.org)

Principal safety requirements and good practices (summary)

• Rated capacity and markings: Hardware must be permanently marked with manufacturer ID and Working Load Limit (WLL) or grade. Never exceed the WLL. (Standards require marking and identification). (ASME.org)
• Design factor / safety factor: Components are designed and specified with minimum design or safety factors (typical common factors are 4:1, 5:1 or 6:1 depending on product grade and standard). Use only hardware rated for the intended WLL. (manufactry.com)
• Correct selection and orientation:
  • Use the correct type (e.g., bow vs. dee shackle, shoulder eyebolts vs. plain eyebolts) for the load geometry. (EVS.ee)
  • Eyebolts must be installed and tightened to the manufacturer’s torque and seating instructions; many eyebolts are rated only for axial (in‑line) loads — side or off‑angle loading drastically reduces capacity unless the eyebolt and installation are rated for angular loading. (ISO.org)
  • Hooks must be loaded in the bowl/base (not tip) and not used in ways that apply side/back/tip loads unless specifically designed for such. Use collector rings or shackles when multiple legs are in a hook. (mazzellacompanies.com)
• Inspection and removal criteria:
  • Inspect before use and periodically (look for deformation, cracks, excessive wear, corrosion, nicks, bent or sprung hooks, damaged threads, stretched shackles). Remove from service any item that fails inspection or has been overloaded or shocked. Standards and OSHA require and detail inspection regimes. (ASME.org)
• Testing and certification:
  • New or repaired hardware should be supplied with manufacturer’s certificates or tested (proof tests / type tests) as required by the applicable standard or OSHA. Hooks or other parts without manufacturer data may require qualification testing to twice the intended safe working load (see OSHA guidance). (OSHA.gov)
• Marking, traceability and manufacturer instructions:
  • Keep and follow manufacturer instructions, certificates and rated capacities. If instructions are not available, treat the item as suspect and consult a qualified person. (ASME.org)
• Environmental and service considerations:
  • Consider temperature limits, chemical exposure, shock loading and wear — standards note limits and require consultation with manufacturers or qualified persons for extreme environments. (mazzellacompanies.com)

Practical items often specified in the standards (examples)

• Shackles: grade, pin type (screw pin, bolt‑type with nut + cotter pin), WLL marking, wedge/collar selection, do not side‑load plain bow/dee shackles unless rated. EN 13889 gives detailed requirements for forged shackles. (EVS.ee)
• Hooks: limit throat opening, use latches appropriately, do not use bent/sprung hooks, inspect for wear in the throat and bearing surfaces; ASME B30.10 covers these. (webstore.ANSI.org)
• Eyebolts: orientation and torque, grade (ISO 3266 addresses forged eyebolts grade 4), and reduced capacity for angular loading unless specified. (ISO.org)

What to do next / where to get the standards and guidance

• Buy or consult the full ASME B30.26 and B30.10 documents for manufacturer‑level and user‑level technical rules and inspection tables (these are the primary U.S. consensus standards for rigging hardware). (ASME.org)
• Follow OSHA regulations and eTool guidance that apply to your industry and worksite; they summarize regulatory requirements and practical employer obligations. (OSHA.gov)
• For products used or manufactured to European/ISO practice, obtain EN 13889 (shackles), EN 1677 (hooks and other sling components), and ISO 3266 (eyebolts). (EVS.ee)

If you want, I can:

• Summarize specific inspection/removal criteria (measures/limits for wear, deformation, elongation) for each hardware type; or
• Pull out the exact rules about eyebolts and angular load‑reduction factors; or
• Provide a concise checklist for pre‑lift inspection and tagging that you can use on site.

Which of those would be most helpful?