Forged Eye Bolt Dimensions Calculator was developed to show dimensions of a selected forged threaded eye bolt intended primarily for lifting applications, and covers the following types and styles.

- Type 1, Plain pattern (straight shank): Long length (Style A) and Short length (Style B)

- Type 2, Shoulder pattern: Long length (Style A) and Short length (Style B)

Forged Eyebolt Dimensions Calculator uses the dimensional data charts of forged eye bolts which are given in the ASME B18.15  standard.

Some important notes from the ASME B18.15:

- Mechanical properties for carbon steel eye bolts are covered by ASTM A 489.

- Forged, quenched and tempered alloy steel threaded eyebolts with improved toughness and intended primarily for low temperature applications are covered by ASTM F 541.

- Eye bolt threads shall be unified coarse thread with tolerance class of 2A. Rolled threads are desirable for improved fatigue life. Eye bolts are used in tapped holes with Class 2B threads.


Nominal eye bolt size (inches)
Eye Bolt Type
Eye Bolt Style


Dimensions of Forged Eye Bolts
Parameter Symbol Value Unit
Nominal Size - --- -
Eye Bolt Type - ---
Eye Bolt Style - ---
Thread Size H ---
Major Thread Diameter [A] Amax --- in
Amin ---
Shank Length [B] Bmax ---
Bmin ---
Eye Internal Diameter [C] Cmax  ---
Cmin ---
Nominal Eye Outer Diameter D ---
Eye Section Diameter [E] Emax ---
Emin ---
Overall Length Fmax ---
Fmin ---
Minimum Full Thread Length Gmin ---
Eye to Shoulder Jmax ---
Jmin ---
Shoulder Diameter Kmax ---
Kmin ---
Shoulder Height Lmax ---
Lmin ---
Radius under Shoulder Rmax ---
Rmin ---


Link Usage
Unified Screw Thread Sizes & Tolerances Calculator Calculates basic major, minor and pitch diameters of the external (bolt) and internal (nut) inch thread according to ASME B1.1-2003 standard. In addition to basic size calculations, limits of sizes calculations of different tolerance classes can be done according to same standard.

  • ANSI / ASME B18.15 - 1985, Forged Eyebolts