text: Chapter 5
  Points of Attachment
  5-42. In slingload operations, the clevis assemblies serve as points of attachment from the aircraft to
  the load.
  Tightening
  5-43. When using any clevis assembly, tighten the nut by hand only. Tape both ends of the nut and bolt
  to prevent slippage during use. Choose only case-hardened nuts and bolts. Never mix items. The bolt heads
  have case-hardened marks such as ticks, numbers, letters, or a combination of all three.
  LARGE-CAPACITY SLING SETS
  5-44. The new 10,000-pound and 25,000-pound capacity sling sets are similar, except for a few minor
  differences. All components have identifying marks. You may only exchange apex fittings between sets.
  Take care not to mix up the other components. Table 5-3 compares these two large-capacity sling sets, and
  Figure 5-9 shows one.
  Type Sling 10,000-Pound Sling 25,000-Pound Sling
  Capacity: 10,000 pounds 25,000 pounds
  Color: Brushed aluminum Gold steel
  Apex fitting Pin diameter: 1 1/8-inch diameter 1 1/2-inch diameter
  Weight: 4 1/2 pounds 10 pounds
  Color: Olive drab Black
  Sling rope Length: 12 feet 12 feet
  Diameter: 7/8 inch 1 1/4 inch
  Chain links-quantity: 110 to 115 links 86 to 88 links
  NSN: 1670-01-027-2902 1670-01-027-2900
  Total weight: 52 pounds 114 pounds
  Table 5-3. Large-capacity sling sets.
  Figure 5-9. 25,000-pound capacity sling set.