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Neutrik D-size XLR and speakON panel cutouts: Ø24 mm hole, 19 x 24 mm screw holes, NL2MP / NL4MP / NL8MPR + cutout gauge
What size hole does a Neutrik XLR chassis connector or speakON NL4MP need? · Standard part · 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
Also called: 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
Exact dimensions. Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part. Mating features
- length
- 40.0 mm
- width
- 40.0 mm
- height
- 3.0 mm
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).
Neutrik D-size XLR and speakON panel cutouts: Ø24 mm hole, 19 x 24… size chart
| part / family | main hole as printed | screw holes / spacing as printed | other as printed | source |
|---|---|---|---|---|
| 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 |
Mating features
Drawn at the exact size. Open press, slide, run and socket features by your process's clearance (tolerances by process); leave designed gaps and clamp fits as drawn.
| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| panel hole 24 mm (file neutrik-d-size-panel-cutout-gauge-24mm) | round hole Ø24.0 mm, the D-size cutout (NL2MP / NL4MP sheets print >= Ø23.8 or >= Ø24.0) | Neutrik D-series XLR chassis connector body (NC3FD, NC3MD, NC4MD) and speakON NL2MP / NL4MP chassis | slide | neutrik-d-size-panel-cutout-gauge* |
| two screw holes Ø3.2 on a 19.0 x 24.0 rectangle (file neutrik-d-size-panel-cutout-gauge-24mm) | Ø3.2 min, spacing 19.0 and 24.0 mm (±0.1), placed on the diagonal | M3 or 4-40 machine screws through the connector flange (countersunk through holes per the NL4MP sheet) | slide | neutrik-d-size-panel-cutout-gauge* |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
Free files
★ Free files 1 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| neutrik-d-size-panel-cutout-gauge-24mm | 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 | STEP · STL |
https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.Plain text: sheet.txt · JSON: /api/geometry?object=neutrik-d-size-xlr-speakon-panel-cutouts
Fits with
Questions
What size hole for an XLR chassis connector?
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.
How far apart are the screw holes of a Neutrik D-series connector?
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.
What screws fit a speakON NL4MP?
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).