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1/4" Hot Dipped Galvanized Eye Nut with 5/16"-18 UNC Tap

Part Number:51750022
1/4" Hot Dipped Galvanized Eye Nut with 5/16"-18 UNC Tap


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1/4" Hot Dipped Galvanized Eye Nut with 5/16"-18 UNC Tap, Working Load Limit (WLL): 520 lbs.5/16"-18 UNC Tap Hot Dipped Galvanized Eye Nut, Working Load Limit (WLL): 520 lbs.

How should you use eye bolts safely?

  • Orient the eye bolt in line with the slings. If the load is applied sideways, the eye bolt may bend.
  • Pack washers between the shoulder and the load surface to ensure that the eye bolt firmly contacts the surface. Ensure that the nut is properly torqued.
  • Engage at least 90% of threads in a receiving hole when using shims or washers.
  • Attach only one sling leg to each eye bolt.
Attach only one sling leg to each eye bolt
  • Inspect and clean the eye bolt threads and the hole.
  • Screw the eye bolt on all the way down and properly seat.
  • Ensure the tapped hole for a screw eye bolt (body bolts) has a minimum depth of one-and-a-half times the bolt diameter.
  • Install the shoulder at right angles to the axis of the hole. The shoulder should be in full contact with the surface of the object being lifted.
  • Use a spreader bar with regular (non-shoulder) eye bolts to keep the lift angle at 90° to the horizontal.
    • Use eye bolts at a horizontal angle greater than 45°. Sling strength at 45° is 71% of vertical sling capacity. Eye bolt strength at 45° horizontal angle drops down to 30% of vertical lifting capacity.
    • Use a swivel hoist ring for angled lifts. The swivel hoist ring will adjust to any sling angle by rotating around the bolt and the hoisting eye pivots 180°.

What should you avoid when using eye bolts?

  • Do not run a sling through a pair of eye bolts: this will reduce the effective angle of lift and will put more strain on the rigging.
  • Do not force the slings through eye bolts. This force may alter the load and the angle of loading.
  • Do not use eye bolts that have been ground, machined or stamped.
  • Do not use bars, grips or wrenches to tighten eye bolts.
  • Do not paint an eye bolt. The paint could cover up flaws.
  • Do not force hooks or other fittings into the eye; they must fit freely.
  • Do not shock load eye bolts.
  • Do not use a single eye bolt to lift a load that is free to rotate.
  • Do not use eye bolts that have worn threads or other flaws.
  • Do not insert the point of a hook in an eye bolt. Use a shackle.
Use a shackle


0.09 lb

Working Load Limit (WLL):

520 lbs.

Eye Thickness (A):

1/4 inches

Threads Per Inch (TPI):

5/16"-18 UNC

Outside Width (B):

1.25 inches

Inside Width Bottom (C):

0.75 inches

Inside Height (D):

1 inches

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