Eye nut Style A vs Style B vs Style D
The styles differ in head size and capacity. Style A is the compact, general-purpose pattern for straight, in-line loading, the everyday choice for a rated attachment point. Style B has a heavier head and bell than Style A, giving higher capacity in the same thread sizes. Style D is a heavy-duty pattern with a larger section for rugged service. An eye nut threads onto an existing stud or bolt, unlike an eye bolt which is one piece. For safe use, seat the eye nut squarely on a flat surface or hardened washer, engage full threads (at least one bolt diameter of thread in steel), and align the eye with the direction of pull. Avoid side loading unless derated; for frequent off-axis pulls, use a swivel hoist ring instead. Choose the material for the environment and load.
Material choices for Style A eye nuts
- 304 and 316 stainless: corrosion resistance, with 316 for marine use.
- Zinc plated: economical corrosion resistance for dry use.
- C1030 and C1045 carbon steel: forged strength for lifting.
Common applications for Style A eye nuts
- Straight, in-line lifting points
- Shackle, hook, and sling attachment
- Machinery, molds, and fixtures
- General rigging on studs and bolts
For higher capacity in the same threads, see Style B eye nuts, and browse every option on the main eye nuts category.
Style A Eye Nuts FAQ
What is the difference between Style A and Style B eye nuts?
Style A is the compact, general-purpose pattern for in-line loading. Style B has a heavier head and bell for higher capacity in the same thread sizes.
How much thread engagement do I need?
Engage full threads, a common target is at least one bolt diameter of thread in steel, and more in softer materials.
Can eye nuts be side loaded?
Avoid side loading unless the manufacturer allows it with derating. Align the eye with the direction of pull, and use a swivel hoist ring for frequent off-axis pulls.