{
 "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": "neutrik-d-size-xlr-speakon-panel-cutouts",
 "name": "Neutrik D-size XLR and speakON panel cutouts: Ø24 mm hole, 19 x 24 mm screw holes, NL2MP / NL4MP / NL8MPR + cutout gauge",
 "kind": "standard",
 "category": "Electronic components",
 "group": "Panel cutouts",
 "year": null,
 "question": "What size hole does a Neutrik XLR chassis connector or speakON NL4MP need?",
 "tags": [
  "xlr",
  "neutrik",
  "d series",
  "speakon",
  "nl4mp",
  "nc3fd",
  "panel cutout",
  "audio connector",
  "chassis connector",
  "hole gauge"
 ],
 "aliases": [
  "xlr panel cutout size",
  "neutrik d series hole size",
  "xlr chassis hole 24 mm",
  "speakon nl4mp cutout",
  "nl4mp panel hole",
  "xlr mounting hole spacing 19 24",
  "neutrik nc3fd-l-1 cutout",
  "d size xlr screw holes",
  "speakon panel mount hole",
  "nl2mp cutout",
  "xlr cutout stl",
  "neutrik d cutout template"
 ],
 "overall_mm": {
  "length": 40,
  "width": 40,
  "height": 3
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/neutrik-d-size-xlr-speakon-panel-cutouts/",
 "sheet_txt": "https://xemstudio.com/objects/neutrik-d-size-xlr-speakon-panel-cutouts/sheet.txt",
 "sheet": {
  "basis": "Neutrik NL2MP / NL4MP / NL8MPR sheets (two copies that disagree on the main hole), distributor listings of the NC3FD-L-1, the NJ3FP6C datasheet and an Amplified Parts listing of the Switchcraft 112BX; one gauge file",
  "overall_mm": {
   "length": 40,
   "width": 40,
   "height": 3
  },
  "notes": [
   "The Neutrik NC3FD-L-1 distributor listings print a 'Standardized D sized 24 mm panel cutout'. speakON NL2MP and NL4MP are D-shaped chassis parts: their sheets print 19.0 and 24.0 with ±0.1 mm, a main hole of at least Ø23.8 or Ø24.0, and a Ø3.2 minimum screw hole.",
   "Disagreement kept: the main hole of the NL2MP / NL4MP is '>= Ø23.8' on the IEWC copy of the sheet and '>= Ø24.0 (.945 in)' on the Farnell copy. The gauge uses Ø24.0, the D-size nominal; open it by your process clearance on either reading.",
   "The two numbers 19.0 and 24.0 are the spacing of the two screw holes. The text read does not say which is horizontal; the file puts the two Ø3.2 holes on the diagonal of that 19 x 24 rectangle, as on the D-series drawing summarised on panel-cutouts. Check your connector's drawing before cutting a one-off panel.",
   "NL8MPR (8-pole) prints a different set: >= Ø31.0, 29.2 and >= Ø3.5, not a D-size cutout.",
   "1/4 in and 3.5 mm jacks: the Neutrik NJ3FP6C datasheet text says only 'dimensionally compatible with D Series (31 x 26 mm)' (its cut-out is a drawing image); the Switchcraft 112BX listing gives panel thickness 0.156 in, bushing ID 0.25 in and 3/8-32 UNEF-2A nuts but no mounting hole. A Switchcraft 3.5 mm jack (35RAPC4BH3) and the CUI SJ1-352xN sheets read give only PC-board layouts, no panel hole. No 1/4 in or 3.5 mm panel hole is tabulated for that reason.",
   "Maker CAD: Neutrik publishes drawings and STEP for each chassis connector on its product pages (linked, not copied)."
  ],
  "table": {
   "columns": [
    "part / family",
    "main hole as printed",
    "screw holes / spacing as printed",
    "other as printed",
    "source"
   ],
   "rows": [
    [
     "Neutrik D-series XLR chassis (e.g. NC3FD-L-1, 3-pole female)",
     "'Standardized D sized 24 mm panel cutout'",
     "not in the listing text (see the gauge file and panel-cutouts)",
     "16 A per contact, rated under 50 V (distributor listing)",
     "e-sonic, Buerklin listings"
    ],
    [
     "speakON NL2MP / NL4MP chassis (IEWC-hosted sheet)",
     ">= Ø23.8 mm",
     "19.0 and 24.0 printed (tolerance ±0.1 mm); >= Ø3.2 (±0.1)",
     "contacts for 3/16 in FASTON tabs 4.8 x 0.5 mm; not for AC mains",
     "Neutrik sheet NL4MP-B"
    ],
    [
     "speakON NL2MP / NL4MP chassis (Farnell-hosted sheet)",
     ">= Ø24.0 mm (.945 in)",
     "19.0 ±0.1 mm (.748 ±.003 in); >= Ø3.2 mm (.126 in)",
     "countersunk through holes for M3 or 4-40 machine screws; self-tapping holes for the Neutrik A-screw (NL4MPXX-3, rear mount only)",
     "Neutrik sheet 3163567"
    ],
    [
     "speakON NL8MPR chassis (IEWC-hosted sheet)",
     ">= Ø31.0 mm",
     "29.2 printed; >= Ø3.5 (±0.1)",
     "pole count not stated in the text read",
     "Neutrik sheet NL4MP-B"
    ],
    [
     "speakON NL4MPXX spec sheet (Shopify-hosted)",
     "not stated in the text read",
     "not stated; 'Standard Hole Position, Thru Holes' in the text, no values",
     "25 A rms continuous per contact (audio ratings higher), 4-pole, D-shaped chassis",
     "Neutrik NL4MPXX spec sheet"
    ],
    [
     "Neutrik NJ3FP6C 1/4 in (6.35 mm) panel jack",
     "cut-out is in a drawing image",
     "not in the text read",
     "'dimensionally compatible with D Series (31 x 26 mm)'",
     "Neutrik NJ3FP6C datasheet"
    ],
    [
     "Switchcraft 112BX 1/4 in stereo jack",
     "mounting hole not listed",
     "—",
     "panel thickness 0.156 in; bushing ID 0.25 in, length 0.276 in; nuts 3/8-32 UNEF-2A",
     "Amplified Parts listing"
    ]
   ]
  }
 },
 "sheet_text": "Neutrik D-size XLR and speakON panel cutouts: Ø24 mm hole, 19 x 24 mm screw holes, NL2MP / NL4MP / NL8MPR + cutout gauge — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/neutrik-d-size-xlr-speakon-panel-cutouts/  (sheet CC BY 4.0)\nBasis: Neutrik NL2MP / NL4MP / NL8MPR sheets (two copies that disagree on the main hole), distributor listings of the NC3FD-L-1, the NJ3FP6C datasheet and an Amplified Parts listing of the Switchcraft 112BX; one gauge file\nCatalog version: 2026-10-20\n\nOverall (mm): length 40.0, width 40.0, height 3.0\n- The Neutrik NC3FD-L-1 distributor listings print a 'Standardized D sized 24 mm panel cutout'. speakON NL2MP and NL4MP are D-shaped chassis parts: their sheets print 19.0 and 24.0 with ±0.1 mm, a main hole of at least Ø23.8 or Ø24.0, and a Ø3.2 minimum screw hole.\n- Disagreement kept: the main hole of the NL2MP / NL4MP is '>= Ø23.8' on the IEWC copy of the sheet and '>= Ø24.0 (.945 in)' on the Farnell copy. The gauge uses Ø24.0, the D-size nominal; open it by your process clearance on either reading.\n- The two numbers 19.0 and 24.0 are the spacing of the two screw holes. The text read does not say which is horizontal; the file puts the two Ø3.2 holes on the diagonal of that 19 x 24 rectangle, as on the D-series drawing summarised on panel-cutouts. Check your connector's drawing before cutting a one-off panel.\n- NL8MPR (8-pole) prints a different set: >= Ø31.0, 29.2 and >= Ø3.5, not a D-size cutout.\n- 1/4 in and 3.5 mm jacks: the Neutrik NJ3FP6C datasheet text says only 'dimensionally compatible with D Series (31 x 26 mm)' (its cut-out is a drawing image); the Switchcraft 112BX listing gives panel thickness 0.156 in, bushing ID 0.25 in and 3/8-32 UNEF-2A nuts but no mounting hole. A Switchcraft 3.5 mm jack (35RAPC4BH3) and the CUI SJ1-352xN sheets read give only PC-board layouts, no panel hole. No 1/4 in or 3.5 mm panel hole is tabulated for that reason.\n- Maker CAD: Neutrik publishes drawings and STEP for each chassis connector on its product pages (linked, not copied).\n\npart / family  main hole as printed  screw holes / spacing as printed  other as printed  source\nNeutrik D-series XLR chassis (e.g. NC3FD-L-1, 3-pole female)  'Standardized D sized 24 mm panel cutout'  not in the listing text (see the gauge file and panel-cutouts)  16 A per contact, rated under 50 V (distributor listing)  e-sonic, Buerklin listings\nspeakON NL2MP / NL4MP chassis (IEWC-hosted sheet)  >= Ø23.8 mm  19.0 and 24.0 printed (tolerance ±0.1 mm); >= Ø3.2 (±0.1)  contacts for 3/16 in FASTON tabs 4.8 x 0.5 mm; not for AC mains  Neutrik sheet NL4MP-B\nspeakON NL2MP / NL4MP chassis (Farnell-hosted sheet)  >= Ø24.0 mm (.945 in)  19.0 ±0.1 mm (.748 ±.003 in); >= Ø3.2 mm (.126 in)  countersunk through holes for M3 or 4-40 machine screws; self-tapping holes for the Neutrik A-screw (NL4MPXX-3, rear mount only)  Neutrik sheet 3163567\nspeakON NL8MPR chassis (IEWC-hosted sheet)  >= Ø31.0 mm  29.2 printed; >= Ø3.5 (±0.1)  pole count not stated in the text read  Neutrik sheet NL4MP-B\nspeakON NL4MPXX spec sheet (Shopify-hosted)  not stated in the text read  not stated; 'Standard Hole Position, Thru Holes' in the text, no values  25 A rms continuous per contact (audio ratings higher), 4-pole, D-shaped chassis  Neutrik NL4MPXX spec sheet\nNeutrik NJ3FP6C 1/4 in (6.35 mm) panel jack  cut-out is in a drawing image  not in the text read  'dimensionally compatible with D Series (31 x 26 mm)'  Neutrik NJ3FP6C datasheet\nSwitchcraft 112BX 1/4 in stereo jack  mounting hole not listed  —  panel thickness 0.156 in; bushing ID 0.25 in, length 0.276 in; nuts 3/8-32 UNEF-2A  Amplified Parts listing\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- e-sonic (Neutrik NC3FD-L-1 listing): Neutrik NC3FD-L-1 3-pole female XLR chassis, 'Standardized D sized 24 mm panel cutout'; 16 A per contact, under 50 V — web — Publisher's page; dimensions are facts — https://www.e-sonic.com/en/neutrik/nc3fdl1-11966688.html\n- Buerklin (Neutrik NC3FD-L-1 listing): Neutrik NC3FD-L-1: panel cutout 24 mm — web — Publisher's page; dimensions are facts — https://www.buerklin.com/en/p/neutrik/xlr-connectors/nc3fd-l-1/70F1880/?view=GRID\n- Neutrik (Farnell-hosted sheet 3163567): speakON NL2MP / NL4MP chassis connector: panel cutout, countersunk through holes for M3 or 4-40, self-tapping holes for the Neutrik A-screw — web — Publisher's page; dimensions are facts — https://www.farnell.com/datasheets/3163567.pdf\n- Neutrik (IEWC-hosted sheet NL4MP-B): speakON NL2MP / NL4MP and NL8MPR: panel cutout table (>= Ø23.8 / 19.0 / 24.0 / >= Ø3.2; NL8MPR >= Ø31.0 / 29.2 / >= Ø3.5) — web — Publisher's page; dimensions are facts — https://media.iewc.com/SpecificationSheets/NL4MP-B.pdf\n- Neutrik (Shopify-hosted spec sheet NL4MPXX): speakON NL4MPXX: 25 A rms continuous per contact, 4-pole, D-shape chassis — web — Publisher's page; dimensions are facts — https://cdn.shopify.com/s/files/1/0628/4404/3505/files/NT-NL4MPXX_spec_sheet.pdf\n- Neutrik (datasheets.com copy): NJ3FP6C 1/4 in jack, panel: 'dimensionally compatible with D Series (31 x 26 mm)' — web — Publisher's page; dimensions are facts — https://static.datasheets.com/doc/3122225-neutrik-nj3fp6c-b-ds.pdf\n- Amplified Parts (Switchcraft 112BX listing): Switchcraft 112BX: panel thickness 0.156 in, bushing ID 0.25 in, bushing length 0.276 in, nuts 3/8-32 UNEF-2A — web — Publisher's page; dimensions are facts — https://www.amplifiedparts.com/node/45669\n- Neutrik: Neutrik XLR chassis connectors: product pages with drawings and STEP (account-free download on the maker's site) — STEP, PDF — Neutrik site terms [verify license at link] — https://www.neutrik.com/en/products/audio/xlr/xlr-chassis-connectors\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/neutrik-d-size-xlr-speakon-panel-cutouts/index.json\nAPI: https://xemstudio.com/api/geometry?object=neutrik-d-size-xlr-speakon-panel-cutouts\n",
 "sources": [
  {
   "publisher": "e-sonic (Neutrik NC3FD-L-1 listing)",
   "title": "Neutrik NC3FD-L-1 3-pole female XLR chassis, 'Standardized D sized 24 mm panel cutout'; 16 A per contact, under 50 V",
   "url": "https://www.e-sonic.com/en/neutrik/nc3fdl1-11966688.html",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Buerklin (Neutrik NC3FD-L-1 listing)",
   "title": "Neutrik NC3FD-L-1: panel cutout 24 mm",
   "url": "https://www.buerklin.com/en/p/neutrik/xlr-connectors/nc3fd-l-1/70F1880/?view=GRID",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Neutrik (Farnell-hosted sheet 3163567)",
   "title": "speakON NL2MP / NL4MP chassis connector: panel cutout, countersunk through holes for M3 or 4-40, self-tapping holes for the Neutrik A-screw",
   "url": "https://www.farnell.com/datasheets/3163567.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Neutrik (IEWC-hosted sheet NL4MP-B)",
   "title": "speakON NL2MP / NL4MP and NL8MPR: panel cutout table (>= Ø23.8 / 19.0 / 24.0 / >= Ø3.2; NL8MPR >= Ø31.0 / 29.2 / >= Ø3.5)",
   "url": "https://media.iewc.com/SpecificationSheets/NL4MP-B.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Neutrik (Shopify-hosted spec sheet NL4MPXX)",
   "title": "speakON NL4MPXX: 25 A rms continuous per contact, 4-pole, D-shape chassis",
   "url": "https://cdn.shopify.com/s/files/1/0628/4404/3505/files/NT-NL4MPXX_spec_sheet.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Neutrik (datasheets.com copy)",
   "title": "NJ3FP6C 1/4 in jack, panel: 'dimensionally compatible with D Series (31 x 26 mm)'",
   "url": "https://static.datasheets.com/doc/3122225-neutrik-nj3fp6c-b-ds.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Amplified Parts (Switchcraft 112BX listing)",
   "title": "Switchcraft 112BX: panel thickness 0.156 in, bushing ID 0.25 in, bushing length 0.276 in, nuts 3/8-32 UNEF-2A",
   "url": "https://www.amplifiedparts.com/node/45669",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Neutrik",
   "title": "Neutrik XLR chassis connectors: product pages with drawings and STEP (account-free download on the maker's site)",
   "url": "https://www.neutrik.com/en/products/audio/xlr/xlr-chassis-connectors",
   "formats": [
    "STEP",
    "PDF"
   ],
   "license": "Neutrik site terms",
   "license_verified": false,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "panel-cutouts",
  "rf-bulkhead-connectors-bnc-n-tnc-f",
  "pushbutton-pilot-light-panel-holes",
  "toggle-switch-bushings-panel-holes",
  "elgato-wave-xlr-mk-2",
  "m12-m8-circular-sensor-connectors"
 ],
 "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": [
  {
   "feature": "panel hole 24 mm (file neutrik-d-size-panel-cutout-gauge-24mm)",
   "exact": "round hole Ø24.0 mm, the D-size cutout (NL2MP / NL4MP sheets print >= Ø23.8 or >= Ø24.0)",
   "mates": "Neutrik D-series XLR chassis connector body (NC3FD, NC3MD, NC4MD) and speakON NL2MP / NL4MP chassis",
   "fit": "slide",
   "files": "neutrik-d-size-panel-cutout-gauge"
  },
  {
   "feature": "two screw holes Ø3.2 on a 19.0 x 24.0 rectangle (file neutrik-d-size-panel-cutout-gauge-24mm)",
   "exact": "Ø3.2 min, spacing 19.0 and 24.0 mm (±0.1), placed on the diagonal",
   "mates": "M3 or 4-40 machine screws through the connector flange (countersunk through holes per the NL4MP sheet)",
   "fit": "slide",
   "files": "neutrik-d-size-panel-cutout-gauge"
  }
 ],
 "fit_classes": {
  "press": "stays put: pin, tube, bearing or magnet held by interference. ISO 286 equivalent: H7/p6 (locational interference) or tighter.",
  "slide": "assembles by hand and is held by a grub, pinch or clamp: shaft in a hub, rod in a socket, spigot in a bore. ISO 286 equivalent: H7/g6 or H7/h6.",
  "run": "turns or slides in use: pin in a link, rod through a guide. ISO 286 equivalent: H8/f7 (close running).",
  "socket": "large sliding fit: syringe barrel, sleeve, bobbin in a bore. ISO 286 equivalent: H9/d9 (free running) or looser.",
  "clamp": "split part that closes on the mating part with screws: make it at size.",
  "designed": "a gap that is part of the design (piston fit option, displacer gap, air gap): do not change."
 },
 "faq": [
  {
   "q": "What size hole for an XLR chassis connector?",
   "a": "Neutrik's NC3FD-L-1 listings print a 'D sized 24 mm panel cutout'. The NL4MP speakON sheets print >= Ø23.8 or >= Ø24.0 depending on the copy."
  },
  {
   "q": "How far apart are the screw holes of a Neutrik D-series connector?",
   "a": "The NL2MP / NL4MP sheets print 19.0 and 24.0 mm (±0.1) with a Ø3.2 minimum screw hole; the file draws the two holes on the diagonal of that 19 x 24 rectangle."
  },
  {
   "q": "What screws fit a speakON NL4MP?",
   "a": "Countersunk through holes for M3 or 4-40 machine screws, or self-tapping holes for the Neutrik A-screw on the NL4MPXX-3 (rear mount only)."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "neutrik-d-size-panel-cutout-gauge-24mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/neutrik-d-size-xlr-speakon-panel-cutouts/neutrik-d-size-panel-cutout-gauge-24mm.step",
   "stl": "https://xemstudio.com/files/hardware/neutrik-d-size-xlr-speakon-panel-cutouts/neutrik-d-size-panel-cutout-gauge-24mm.stl",
   "note": "panel-cutout gauge plate, 40 x 40 x 3 mm: centre hole Ø24.0 (the D-size cutout) and two Ø3.2 screw holes at (-9.5, +12.0) and (+9.5, -12.0) mm, i.e. on the diagonal of the 19 x 24 rectangle (NL2MP / NL4MP sheets print 19.0 and 24.0 and a Ø3.2 minimum screw hole; the diagonal placement follows the Neutrik D-series drawing summarised on panel-cutouts); plate size, thickness and corner radius are Xem choices"
  }
 ],
 "markdown": "https://xemstudio.com/objects/neutrik-d-size-xlr-speakon-panel-cutouts/index.md"
}