Adaptive Technologies Group FC-010 Wire Rope Sling - 10"Drop forged shoulder eyebolts and eyenuts provide very strong and predictable suspension points for overhead rigging systems. Forged components provide a consistent, safe and load rated fastener when reliability counts. These components are produced in the United States. Load rating values are calculated with a 5: 1 safety (design) factor. To calculate the approximate ultimate failure load, multiply the indi cated working load limit (WLL) by five.