# Regular shoulder eye bolts, inch (drop forged), 1/4 to 1 in: eye, shoulder, overall and thread length (dimensions only) > What are the eye diameter, shoulder diameter and thread length of a 1/2 in shoulder eye bolt? - Category: Hardware › Fasteners - Kind: Standard part - Basis: One maker's regular-shoulder drop-forged eye bolt catalogue sheet (30 size × shank rows); dimensions only, no load values - Page: https://xemstudio.com/objects/shoulder-eye-bolts-inch/ · JSON: https://xemstudio.com/api/geometry?object=shoulder-eye-bolts-inch · Plain text: https://xemstudio.com/objects/shoulder-eye-bolts-inch/sheet.txt - License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license - Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/) **Exact dimensions.** True size, with no tolerance added. ## Notes - Rows are the Chicago Hardware regular-shoulder pattern as printed: nominal thread size × shank length, outside eye C, inside eye D, overall length E, outside shoulder F, shoulder thickness G and thread length T (inches). Each size has one set of eye and shoulder dimensions, with several shank lengths; the thread length is per row. The sheet's 7/8 x 5 thread length prints as 2-12 followed by an inch mark and reads as 2-1/2 in against the neighbouring rows. - Working load limits, weights and part numbers are left out on purpose: a lifting figure should come from the marking on the eye bolt, not from a dimension page. The sheet names an ASME standard for its requirements but the number is not legible in the text read, so no standard is cited for these dimensions. - These are one maker's dimensions; other makers' shoulder eye bolts differ in eye size and shoulder. The sheet notes special shank and thread lengths are available. - Not published as numbers: the eye cross-section, the neck blending eye to shoulder, thread form. No file is drawn. McMaster-Carr sells forged lifting eyebolts, inch and metric, with per-part STEP; its category is linked, not copied. Metric DIN 580: eye-bolts-din-580. ## Sizes | size × shank length | outside eye C | inside eye D | overall length E | outside shoulder F | shoulder thickness G | thread length T | |---|---|---|---|---|---|---| | 1/4" x 2 | 1" | 1/2" | 3-1/8" | 7/16" | 5/64" | 1-1/2" | | 1/4" x 3 | 1" | 1/2" | 4-1/8" | 7/16" | 5/64" | 1-1/2" | | 1/4" x 4 | 1" | 1/2" | 5-1/8" | 7/16" | 5/64" | 2" | | 5/16" x 2-1/4 | 1-1/4" | 5/8" | 3-5/8" | 9/16" | 3/32" | 1-1/2" | | 5/16" x 3-1/4 | 1-1/4" | 5/8" | 4-5/8" | 9/16" | 3/32" | 1-1/2" | | 5/16" x 4-1/4 | 1-1/4" | 5/8" | 5-5/8" | 9/16" | 3/32" | 2-1/2" | | 3/8" x 2-1/2 | 1-1/2" | 3/4" | 4-1/4" | 11/16" | 1/8" | 1-1/2" | | 3/8" x 3 | 1-1/2" | 3/4" | 4-3/4" | 11/16" | 1/8" | 1-1/2" | | 3/8" x 4-1/2 | 1-1/2" | 3/4" | 6-1/4" | 11/16" | 1/8" | 2" | | 3/8" x 5 | 1-1/2" | 3/4" | 6-3/4" | 11/16" | 1/8" | 2-1/2" | | 3/8" x 6 | 1-1/2" | 3/4" | 7-3/4" | 11/16" | 1/8" | 3" | | 3/8" x 8 | 1-1/2" | 3/4" | 9-3/4" | 11/16" | 1/8" | 4" | | 1/2" x 2 | 2" | 1" | 4-5/16" | 7/8" | 5/32" | 1-7/8" | | 1/2" x 3-1/4 | 2" | 1" | 5-1/2" | 7/8" | 5/32" | 1-1/2" | | 1/2" x 4-1/2 | 2" | 1" | 6-3/4" | 7/8" | 5/32" | 2" | | 1/2" x 6 | 2" | 1" | 8-1/4" | 7/8" | 5/32" | 3" | | 1/2" x 8 | 2" | 1" | 10-1/4" | 7/8" | 5/32" | 4" | | 1/2" x 10 | 2" | 1" | 12-1/4" | 7/8" | 5/32" | 4" | | 1/2" x 12 | 2" | 1" | 14-1/4" | 7/8" | 5/32" | 4" | | 5/8" x 4-1/2 | 2-5/16" | 1-1/4" | 7-1/4" | 1-1/8" | 13/64" | 2" | | 5/8" x 6 | 2-5/16" | 1-1/4" | 8-9/16" | 1-1/8" | 13/64" | 3" | | 5/8" x 8 | 2-5/16" | 1-1/4" | 10-9/16" | 1-1/8" | 13/64" | 4" | | 5/8" x 10 | 2-5/16" | 1-1/4" | 12-9/16" | 1-1/8" | 13/64" | 4" | | 5/8" x 12 | 2-5/16" | 1-1/4" | 14-9/16" | 1-1/8" | 13/64" | 4" | | 3/4" x 4-1/2 | 2-3/4" | 1-1/2" | 7-3/4" | 1-3/8" | 1/4" | 2-1/2" | | 3/4" x 6 | 2-3/4" | 1-1/2" | 9-1/8" | 1-3/8" | 1/4" | 3" | | 7/8" x 5 | 3-1/2" | 1-3/4" | 9-1/4" | 1-1/2" | 9/32" | 2-1/2" (printed "2-12"") | | 7/8" x 8 | 3-1/2" | 1-3/4" | 12-1/8" | 1-1/2" | 9/32" | 4" | | 1" x 6 | 3-3/4" | 2" | 10-1/2" | 1-3/4" | 5/16" | 3" | | 1" x 9 | 3-3/4" | 2" | 13-1/4" | 1-3/4" | 5/16" | 4" | ## Where the files are - Chicago Hardware (via BigCommerce): [Regular shoulder drop-forged eye bolts, 1/4 to 1 in: outside eye C, inside eye D, overall length E, outside shoulder F, shoulder thickness G, thread length T](https://cdn11.bigcommerce.com/s-11cqjpjngs/content/files/Chicago-Regular-Shoulder-Eye-Bolts.pdf) — web — Maker catalogue sheet; numbers only - McMaster-Carr: [Galvanized eyebolts (for lifting) (free STEP/IGES per part, for your own design use; no redistribution)](https://www.mcmaster.com/galvanized-eyebolts) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution (verify at link) - McMaster-Carr: [DIN 580 eyebolts (free STEP/IGES per part, for your own design use; no redistribution)](https://www.mcmaster.com/din-580-eyebolts) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution (verify at link) ## Questions **What is the inside eye of a 1/2 in shoulder eye bolt?** 1 in inside eye (D), 2 in outside eye (C), 7/8 in outside shoulder (F) in the Chicago Hardware regular-shoulder sheet. **How long is the thread on a 3/8 x 3 shoulder eye bolt?** 1-1/2 in on that sheet; overall length 4-3/4 in. **What is the shoulder thickness on a 1/4 in eye bolt?** 5/64 in on the Chicago Hardware sheet (outside shoulder 7/16 in). ## Fits with - [Lifting eye bolts, DIN 580, M6–M36: eye, collar, height, thread length (dimensions only)](https://xemstudio.com/objects/eye-bolts-din-580/) - [Hex bolts, inch: 1/4-20 to 3/4-10 (ASME B18.2.1)](https://xemstudio.com/objects/hex-bolts-inch/) - [Hex lag screws, 1/4 to 1/2 in (ASME B18.2.1): shank, head width and height, pilot holes + envelope models](https://xemstudio.com/objects/lag-screws-hex-inch/) - [Shoulder screws ASME B18.3 (inch): shoulder Ø 1/4 to 3/4 in, thread, head size, hex key, thread length](https://xemstudio.com/objects/shoulder-screws-asme-b18-3/) - [Shackles: Crosby G-209 / S-209 bow (anchor), G-210 / S-210 D (chain) and G-2130 bolt-type bow, 3/16 to 4 in — dimensions and WLL](https://xemstudio.com/objects/shackles-bow-d-crosby-g209-g210-g2130/)