{
 "version": "2026-10-20",
 "license": "Dimension sheets: CC BY 4.0. Standard and published-size files: CC BY 4.0. Xem Studio's own designs (files_license = Xem Studio Design License): free to use and sell things from, not to redistribute as files — https://xemstudio.com/license/. Other publishers' files: their own license, linked beside them.",
 "slug": "slip-hooks-crosby-h331-a331",
 "name": "Crosby H-331 / A-331 clevis slip hooks and H-324 eye slip hooks: working load limit and dimensions, 1/4 to 3/4 in chain size",
 "kind": "standard",
 "category": "Hardware",
 "group": "Rigging & lifting",
 "year": null,
 "question": "What are the dimensions and working load limit of a Crosby A-331 clevis slip hook?",
 "tags": [
  "slip hook",
  "clevis slip hook",
  "crosby",
  "a-331",
  "h-331",
  "hook",
  "rigging",
  "chain hook",
  "eye slip hook"
 ],
 "aliases": [
  "crosby a-331 dimensions",
  "clevis slip hook size chart",
  "a331 slip hook",
  "h-331 slip hook",
  "crosby h-324 eye slip hook",
  "slip hook wll",
  "5/16 clevis slip hook wll",
  "3/8 slip hook 5250 lb",
  "clevis hook chain size",
  "crosby slip hook weight"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "not-scanned",
 "les": false,
 "free_files": 0,
 "url": "https://xemstudio.com/objects/slip-hooks-crosby-h331-a331/",
 "sheet_txt": "https://xemstudio.com/objects/slip-hooks-crosby-h331-a331/sheet.txt",
 "sheet": {
  "basis": "Crosby's H-331 / A-331 / H-324 data sheet (a distributor's copy), read in this session; numbers only (the sheet's drawing letters are not defined in text)",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "A slip hook has an open throat with no latch, for chain and tie-down work. Tables as printed: chain size in inches, WLL in lb, dimensions in inches, weight in lb. For clevis hooks the first WLL is carbon steel H-331 and the second alloy A-331 (A-331 has no 3/4 in carbon size on the sheet; shown '—'). Eye slip hooks H-324 are carbon steel only; they have no P or T column, so those cells are '—'.",
   "Letters A to T are the sheet's own; the drawing is an image and the text does not define them, so no letter is interpreted. The sheet's footnote: ultimate load is 4 times the WLL, and these hooks are not suitable for Grade 80 chain and chain slings in overhead lifting (the sheet points to Grade 80 or 100 alloy components for those).",
   "No file: hook throat and clevis shape are not defined by published numbers (undefined letters, no profile), so a model would be invented. Shackles are on shackles-bow-d-crosby-g209-g210-g2130.",
   "McMaster-Carr's hook category is linked for per-part STEP; nothing is copied."
  ],
  "table": {
   "columns": [
    "hook",
    "chain size (in)",
    "WLL (lb)",
    "weight each (lb)",
    "A",
    "B",
    "C",
    "D",
    "E",
    "F",
    "G",
    "H",
    "K",
    "L",
    "N",
    "P",
    "R",
    "T"
   ],
   "rows": [
    [
     "clevis slip hook H-331 (carbon) / A-331 (alloy)",
     "1/4",
     "1950 / 2750",
     ".55",
     "1.06",
     ".32",
     ".29",
     "2.75",
     ".94",
     "1.19",
     ".81",
     ".88",
     ".50",
     "3.95",
     "2.13",
     ".31",
     "2.58",
     ".81"
    ],
    [
     "clevis slip hook H-331 (carbon) / A-331 (alloy)",
     "5/16",
     "2875 / 4300",
     ".79",
     "1.22",
     ".43",
     ".34",
     "3.06",
     "1.06",
     "1.25",
     ".94",
     "1.00",
     ".56",
     "4.52",
     "2.25",
     ".38",
     "2.87",
     ".97"
    ],
    [
     "clevis slip hook H-331 (carbon) / A-331 (alloy)",
     "3/8",
     "4000 / 5250",
     "1.21",
     "1.38",
     ".45",
     ".44",
     "3.63",
     "1.31",
     "1.50",
     "1.13",
     "1.19",
     ".66",
     "5.15",
     "2.56",
     ".44",
     "3.25",
     "1.06"
    ],
    [
     "clevis slip hook H-331 (carbon) / A-331 (alloy)",
     "7/16",
     "5000 / 7000",
     "2.06",
     "1.73",
     ".59",
     ".60",
     "4.34",
     "1.56",
     "1.81",
     "1.38",
     "1.44",
     ".81",
     "5.97",
     "3.06",
     ".56",
     "3.70",
     "1.19"
    ],
    [
     "clevis slip hook H-331 (carbon) / A-331 (alloy)",
     "1/2",
     "6500 / 9000",
     "2.75",
     "1.88",
     ".57",
     ".53",
     "4.81",
     "1.69",
     "1.94",
     "1.56",
     "1.63",
     ".91",
     "6.53",
     "3.44",
     ".63",
     "4.00",
     "1.31"
    ],
    [
     "clevis slip hook H-331 (carbon) / A-331 (alloy)",
     "5/8",
     "9250 / 13500",
     "4.75",
     "2.31",
     ".71",
     ".71",
     "5.63",
     "2.00",
     "2.38",
     "1.81",
     "1.94",
     "1.09",
     "7.89",
     "4.00",
     ".75",
     "4.94",
     "1.56"
    ],
    [
     "clevis slip hook H-331 (carbon) / A-331 (alloy)",
     "3/4",
     "— / 19250",
     "11.28",
     "3.19",
     "1.18",
     "1.29",
     "7.38",
     "2.50",
     "3.00",
     "2.38",
     "2.50",
     "1.44",
     "10.02",
     "5.06",
     "1.00",
     "6.09",
     "2.09"
    ],
    [
     "eye slip hook H-324 (carbon)",
     "1/4",
     "1950",
     ".40",
     "1.06",
     ".50",
     ".28",
     "2.75",
     ".94",
     "1.19",
     ".81",
     ".88",
     ".50",
     "3.66",
     "2.13",
     "—",
     "2.56",
     "—"
    ],
    [
     "eye slip hook H-324 (carbon)",
     "5/16",
     "2875",
     ".64",
     "1.25",
     ".63",
     ".34",
     "3.06",
     "1.06",
     "1.25",
     ".94",
     "1.00",
     ".56",
     "4.23",
     "2.25",
     "—",
     "2.95",
     "—"
    ],
    [
     "eye slip hook H-324 (carbon)",
     "3/8",
     "4000",
     "1.10",
     "1.53",
     ".72",
     ".41",
     "3.63",
     "1.31",
     "1.50",
     "1.13",
     "1.19",
     ".66",
     "4.89",
     "2.56",
     "—",
     "3.36",
     "—"
    ],
    [
     "eye slip hook H-324 (carbon)",
     "7/16",
     "5000",
     "1.56",
     "1.69",
     ".81",
     ".44",
     "4.34",
     "1.56",
     "1.81",
     "1.38",
     "1.44",
     ".81",
     "5.70",
     "3.06",
     "—",
     "3.88",
     "—"
    ],
    [
     "eye slip hook H-324 (carbon)",
     "1/2",
     "6500",
     "2.09",
     "1.94",
     ".94",
     ".50",
     "4.81",
     "1.69",
     "1.94",
     "1.56",
     "1.63",
     ".91",
     "6.34",
     "3.44",
     "—",
     "4.28",
     "—"
    ],
    [
     "eye slip hook H-324 (carbon)",
     "5/8",
     "9250",
     "3.90",
     "2.38",
     "1.13",
     ".63",
     "5.63",
     "2.00",
     "2.38",
     "1.81",
     "1.94",
     "1.09",
     "7.66",
     "4.00",
     "—",
     "5.22",
     "—"
    ],
    [
     "eye slip hook H-324 (carbon)",
     "3/4",
     "12500",
     "6.93",
     "2.88",
     "1.38",
     ".75",
     "6.75",
     "2.13",
     "2.75",
     "2.19",
     "2.31",
     "1.31",
     "8.73",
     "4.75",
     "—",
     "5.80",
     "—"
    ]
   ]
  }
 },
 "sheet_text": "Crosby H-331 / A-331 clevis slip hooks and H-324 eye slip hooks: working load limit and dimensions, 1/4 to 3/4 in chain size — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/slip-hooks-crosby-h331-a331/  (sheet CC BY 4.0)\nBasis: Crosby's H-331 / A-331 / H-324 data sheet (a distributor's copy), read in this session; numbers only (the sheet's drawing letters are not defined in text)\nCatalog version: 2026-10-20\n\nSizes: see table below\n- A slip hook has an open throat with no latch, for chain and tie-down work. Tables as printed: chain size in inches, WLL in lb, dimensions in inches, weight in lb. For clevis hooks the first WLL is carbon steel H-331 and the second alloy A-331 (A-331 has no 3/4 in carbon size on the sheet; shown '—'). Eye slip hooks H-324 are carbon steel only; they have no P or T column, so those cells are '—'.\n- Letters A to T are the sheet's own; the drawing is an image and the text does not define them, so no letter is interpreted. The sheet's footnote: ultimate load is 4 times the WLL, and these hooks are not suitable for Grade 80 chain and chain slings in overhead lifting (the sheet points to Grade 80 or 100 alloy components for those).\n- No file: hook throat and clevis shape are not defined by published numbers (undefined letters, no profile), so a model would be invented. Shackles are on shackles-bow-d-crosby-g209-g210-g2130.\n- McMaster-Carr's hook category is linked for per-part STEP; nothing is copied.\n\nhook  chain size (in)  WLL (lb)  weight each (lb)  A  B  C  D  E  F  G  H  K  L  N  P  R  T\nclevis slip hook H-331 (carbon) / A-331 (alloy)  1/4  1950 / 2750  .55  1.06  .32  .29  2.75  .94  1.19  .81  .88  .50  3.95  2.13  .31  2.58  .81\nclevis slip hook H-331 (carbon) / A-331 (alloy)  5/16  2875 / 4300  .79  1.22  .43  .34  3.06  1.06  1.25  .94  1.00  .56  4.52  2.25  .38  2.87  .97\nclevis slip hook H-331 (carbon) / A-331 (alloy)  3/8  4000 / 5250  1.21  1.38  .45  .44  3.63  1.31  1.50  1.13  1.19  .66  5.15  2.56  .44  3.25  1.06\nclevis slip hook H-331 (carbon) / A-331 (alloy)  7/16  5000 / 7000  2.06  1.73  .59  .60  4.34  1.56  1.81  1.38  1.44  .81  5.97  3.06  .56  3.70  1.19\nclevis slip hook H-331 (carbon) / A-331 (alloy)  1/2  6500 / 9000  2.75  1.88  .57  .53  4.81  1.69  1.94  1.56  1.63  .91  6.53  3.44  .63  4.00  1.31\nclevis slip hook H-331 (carbon) / A-331 (alloy)  5/8  9250 / 13500  4.75  2.31  .71  .71  5.63  2.00  2.38  1.81  1.94  1.09  7.89  4.00  .75  4.94  1.56\nclevis slip hook H-331 (carbon) / A-331 (alloy)  3/4  — / 19250  11.28  3.19  1.18  1.29  7.38  2.50  3.00  2.38  2.50  1.44  10.02  5.06  1.00  6.09  2.09\neye slip hook H-324 (carbon)  1/4  1950  .40  1.06  .50  .28  2.75  .94  1.19  .81  .88  .50  3.66  2.13  —  2.56  —\neye slip hook H-324 (carbon)  5/16  2875  .64  1.25  .63  .34  3.06  1.06  1.25  .94  1.00  .56  4.23  2.25  —  2.95  —\neye slip hook H-324 (carbon)  3/8  4000  1.10  1.53  .72  .41  3.63  1.31  1.50  1.13  1.19  .66  4.89  2.56  —  3.36  —\neye slip hook H-324 (carbon)  7/16  5000  1.56  1.69  .81  .44  4.34  1.56  1.81  1.38  1.44  .81  5.70  3.06  —  3.88  —\neye slip hook H-324 (carbon)  1/2  6500  2.09  1.94  .94  .50  4.81  1.69  1.94  1.56  1.63  .91  6.34  3.44  —  4.28  —\neye slip hook H-324 (carbon)  5/8  9250  3.90  2.38  1.13  .63  5.63  2.00  2.38  1.81  1.94  1.09  7.66  4.00  —  5.22  —\neye slip hook H-324 (carbon)  3/4  12500  6.93  2.88  1.38  .75  6.75  2.13  2.75  2.19  2.31  1.31  8.73  4.75  —  5.80  —\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- The Crosby Group (via M.E. Campbell copy): H-331 / A-331 clevis slip hooks and H-324 eye slip hooks: chain size, stock numbers, WLL, weight, A to T — web — Maker data sheet copy; numbers only. Letters are the sheet's own; its drawing is an image — https://www.mecampbell.com/media/pdf/THECRSE00013_250.pdf\n- McMaster-Carr: Hooks (slip, grab, sling) (free STEP/IGES per part, for your own design use; no redistribution) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/products/hooks/\n\nNo true-size file yet: the published figures do not fix the whole shape; a measured scan is planned.\nAPI: https://xemstudio.com/api/geometry?object=slip-hooks-crosby-h331-a331\n",
 "sources": [
  {
   "publisher": "The Crosby Group (via M.E. Campbell copy)",
   "title": "H-331 / A-331 clevis slip hooks and H-324 eye slip hooks: chain size, stock numbers, WLL, weight, A to T",
   "url": "https://www.mecampbell.com/media/pdf/THECRSE00013_250.pdf",
   "formats": [
    "web"
   ],
   "license": "Maker data sheet copy; numbers only. Letters are the sheet's own; its drawing is an image",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "McMaster-Carr",
   "title": "Hooks (slip, grab, sling) (free STEP/IGES per part, for your own design use; no redistribution)",
   "url": "https://www.mcmaster.com/products/hooks/",
   "formats": [
    "STEP",
    "IGES",
    "PDF"
   ],
   "license": "McMaster-Carr site terms: personal design use, no redistribution",
   "license_verified": false,
   "hosted": false
  }
 ],
 "xem": {
  "status": "not-scanned",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "shackles-bow-d-crosby-g209-g210-g2130",
  "hoist-rings-crosby-hr-125",
  "turnbuckles-din-1480",
  "wire-rope-clips-crosby-g450-g429",
  "wire-rope-thimbles-din-6899",
  "eye-bolts-din-580"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no tolerance added)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no tolerance added. Where a part meets another part, the object lists its mating features (feature, exact size, what it mates with, fit class: press, slide, run, socket, clamp or designed). Apply your process's allowance to those features only; 'designed' gaps are part of the design and stay as drawn. Typical accuracy by process and ISO 286 fits: https://xemstudio.com/tolerances/",
 "mating": [],
 "faq": [
  {
   "q": "What is the WLL of a 3/8 in Crosby A-331 slip hook?",
   "a": "5250 lb for alloy A-331 and 4000 lb for carbon H-331, on the data sheet read."
  },
  {
   "q": "What is the WLL of a 1/2 in A-331 clevis slip hook?",
   "a": "9000 lb (alloy); the carbon H-331 is 6500 lb."
  },
  {
   "q": "Is an A-331 slip hook for lifting?",
   "a": "The sheet says H-331 / H-324 slip hooks are not suitable for Grade 80 chain slings in overhead lifting; use the maker's rated components."
  }
 ],
 "files_license": null,
 "offers": [],
 "markdown": "https://xemstudio.com/objects/slip-hooks-crosby-h331-a331/index.md"
}