1. Sizes: 1/4" - 1-1/2"

• This indicates the range of thread diameters available for the eye bolts. The sizes start at 1/4 inch and go up to 1-1/2 inches.

2. US Type M-279 S-279

• M-279: This refers to the ASME B18.15 standard for lifting eye bolts. The "M" typically stands for "Metric," but in this context, it refers to the mechanical type of eye bolt designed for straight vertical lifting.

• S-279: This refers to the ASME B18.15 standard for shoulder pattern eye bolts. The "S" indicates that these eye bolts have a shoulder, which allows for angular lifting (typically up to 45 degrees from vertical).

Key Features of Lifting Eye Bolts:

• Material: Typically made from forged carbon steel or alloy steel, often heat-treated for strength.

• Finish: May have a plain, zinc-plated, or hot-dip galvanized finish for corrosion resistance.

• Working Load Limit (WLL): The maximum load the eye bolt can safely handle, which varies based on size and type.

• Angular Lifting: Type S-279 eye bolts are designed for angular lifting (up to 45 degrees), while Type M-279 is for straight vertical lifting only.

Applications:

• Lifting and rigging in construction, manufacturing, and transportation.

• Securing loads during lifting operations.

• Used with shackles, hooks, or other rigging hardware.

Important Notes:

• Always ensure the eye bolt is properly rated for the load and application.

• Use shoulder-type eye bolts (S-279) for angular lifts, as standard eye bolts (M-279) are not designed for side loading.

• Regularly inspect eye bolts for wear, deformation, or damage before use.