{
 "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": "crb-door-knob-butt-cap-crbc-30",
 "name": "CRB door-knob butt cap CRBC-30 (size 30 mm)",
 "kind": "modern",
 "category": "Fishing",
 "group": "Grips and butt hardware",
 "year": null,
 "question": "What are the dimensions of the CRB door-knob butt cap CRBC-30 (size 30 mm)?",
 "tags": [
  "fishing",
  "fishing rod",
  "rod building",
  "tackle",
  "grips and butt hardware"
 ],
 "aliases": [
  "crb crbc-30",
  "30mm butt cap",
  "door knob butt cap",
  "fishing rod butt cap size",
  "rod butt cap 30 mm inside diameter",
  "crb butt cap size chart",
  "tapón de culata caña de pesca",
  "endkappe angelrute",
  "ponteira vara de pesca"
 ],
 "overall_mm": {
  "length": 41.91,
  "width": 41.91,
  "height": 54.61
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/crb-door-knob-butt-cap-crbc-30/",
 "sheet_txt": "https://xemstudio.com/objects/crb-door-knob-butt-cap-crbc-30/sheet.txt",
 "sheet": {
  "basis": "Secondary source: Mud Hole Custom Tackle (CRB) (copy of the maker's figures; the maker publishes none directly)",
  "overall_mm": {
   "length": 41.91,
   "width": 41.91,
   "height": 54.61
  },
  "notes": [
   "CRB's door-knob butt cap fits over a grip or butt of about 30 mm; Mud Hole publishes ID, OD and length.",
   "The rounded knob profile and bore depth are not published, so only an envelope with the bore diameter can be built.",
   "Retailer/brand-owner Mud Hole is the only source (secondary).",
   "True size, no printing tolerance added. Only published numbers are used; anything not published is said so.",
   "Secondary source: the numbers come from a retailer or magazine copy of the maker's specification."
  ],
  "table": {
   "columns": [
    "dimension",
    "value"
   ],
   "rows": [
    [
     "Nominal size",
     "30 mm"
    ],
    [
     "Inside diameter",
     "29.97 mm (1.18 in)"
    ],
    [
     "Outside diameter",
     "41.91 mm (1.65 in)"
    ],
    [
     "Length",
     "54.61 mm (2.15 in)"
    ],
    [
     "Bore depth",
     "not published"
    ]
   ]
  }
 },
 "sheet_text": "CRB door-knob butt cap CRBC-30 (size 30 mm) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/crb-door-knob-butt-cap-crbc-30/  (sheet CC BY 4.0)\nBasis: Secondary source: Mud Hole Custom Tackle (CRB) (copy of the maker's figures; the maker publishes none directly)\nCatalog version: 2026-10-20\n\nOverall (mm): length 41.91, width 41.91, height 54.61\n- CRB's door-knob butt cap fits over a grip or butt of about 30 mm; Mud Hole publishes ID, OD and length.\n- The rounded knob profile and bore depth are not published, so only an envelope with the bore diameter can be built.\n- Retailer/brand-owner Mud Hole is the only source (secondary).\n- True size, no printing tolerance added. Only published numbers are used; anything not published is said so.\n- Secondary source: the numbers come from a retailer or magazine copy of the maker's specification.\n\ndimension  value\nNominal size  30 mm\nInside diameter  29.97 mm (1.18 in)\nOutside diameter  41.91 mm (1.65 in)\nLength  54.61 mm (2.15 in)\nBore depth  not published\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Mud Hole Custom Tackle (CRB): CRB Door Knob Style Butt Caps - size chart — web — Publisher's page; dimensions are facts — https://mudhole.com/en-ca/products/crb-door-knob-style-butt-caps\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/crb-door-knob-butt-cap-crbc-30/index.json\nAPI: https://xemstudio.com/api/geometry?object=crb-door-knob-butt-cap-crbc-30\n",
 "sources": [
  {
   "publisher": "Mud Hole Custom Tackle (CRB)",
   "title": "CRB Door Knob Style Butt Caps - size chart",
   "url": "https://mudhole.com/en-ca/products/crb-door-knob-style-butt-caps",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "fuji-gc-graphite-gimbal-gc22",
  "fuji-gc-graphite-gimbal-gc25",
  "crb-door-knob-butt-cap-crbc-20",
  "crb-door-knob-butt-cap-crbc-22"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no printing tolerance)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no printing tolerance. 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.",
 "mating": [],
 "faq": [
  {
   "q": "What fits a CRBC-30 butt cap?",
   "a": "A butt or grip up to 29.97 mm (1.18 in) diameter."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "crb-door-knob-butt-cap-crbc-30-envelope",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/crb-door-knob-butt-cap-crbc-30/crb-door-knob-butt-cap-crbc-30-envelope.step",
   "stl": "https://xemstudio.com/files/hardware/crb-door-knob-butt-cap-crbc-30/crb-door-knob-butt-cap-crbc-30-envelope.stl",
   "note": "Envelope Ø41.91 × 54.61 mm (bore depth and profile not published, not modelled)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/crb-door-knob-butt-cap-crbc-30/index.md"
}