{
 "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": "round-spacers-unthreaded-id-od",
 "name": "Unthreaded round spacers by ID and OD: M2–M5 brass and aluminium sleeve spacers (Essentra, JC Fasteners, Keystone) + 10 tube models",
 "kind": "standard",
 "category": "Hardware",
 "group": "Fasteners",
 "year": null,
 "question": "What ID, OD and lengths do unthreaded round spacers come in for M3 and M4 screws?",
 "tags": [
  "round spacer",
  "unthreaded spacer",
  "sleeve spacer",
  "m3 spacer",
  "m4 spacer",
  "standoff spacer",
  "bushing spacer",
  "aluminium spacer",
  "brass spacer",
  "fastener"
 ],
 "aliases": [
  "m3 round spacer id od",
  "m4 spacer 4.3 id 8 od",
  "unthreaded spacer 3.2 id",
  "m5 round spacer 5.3 id",
  "m2 spacer 2.2 id 5 od",
  "aluminium spacer m3 3.2 5 mm od",
  "brass spacer 6 mm od 3.2 id",
  "#4 round spacer 0.250 od",
  "round spacer sizes chart",
  "unthreaded standoff m3",
  "spacer sleeve 10 mm od 5.3",
  "round spacer stl"
 ],
 "overall_mm": {
  "length": 10,
  "width": 10,
  "height": 10
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 10,
 "url": "https://xemstudio.com/objects/round-spacers-unthreaded-id-od/",
 "sheet_txt": "https://xemstudio.com/objects/round-spacers-unthreaded-id-od/sheet.txt",
 "sheet": {
  "basis": "Essentra's brass round unthreaded spacer listing (three pages read), JC Fasteners' aluminium E5C18 data sheet (M2 to M5), Keystone Electronics' round clear-hole spacer datasheets; ten tube envelopes as files",
  "overall_mm": {
   "length": 10,
   "width": 10,
   "height": 10
  },
  "notes": [
   "Millimetres unless marked. Round unthreaded spacers (sleeve spacers) by inside diameter, outside diameter and length. Essentra's brass spacers: ID / OD pairs 2.2 / 4.0, 2.5 / 5.0, 3.2 / 6.0, 4.3 / 8.0, 5.3 / 10.0; the lengths shown are those seen on three of the five listing pages (54 results in all), so they are examples, not the full range. JC Fasteners' E5C18 aluminium spacers: M2 2.2 / 5.0, M2.5 2.7 / 5.0, M3 3.2 / 5.0, M4 4.3 / 6.0, M5 5.3 / 7.0, with lengths 3 (or 4, 5) to 50 mm as listed; the sheet states no tolerances and says its data is informative.",
   "The IDs are clearance sizes for the screw (2.2 for M2, 3.2 for M3, 4.3 for M4, 5.3 for M5, as the makers list them); the two makers differ in OD for the same bore (3.2 ID: OD 6.0 Essentra, OD 5.0 JC) and in the M2.5 ID (2.5 Essentra, 2.7 JC), so choose by the OD you need. Keystone's round clear-hole spacers (inch) have OD 0.250 or 0.312 in and lengths 0.125 to 2 in for #4, #6, #8 and #10 screws in aluminium, brass, nylon 6/6 or phenolic; part 3458 is 0.250 in OD × 0.375 in long (Newark lists a 3.048 mm bore for it; the Keystone page does not give the ID).",
   "Files: ten plain tubes at the published ID and OD, drawn at an example length of 10 mm (Xem's choice; every size is available in more than one length). Chamfers, if any, are not published. Threaded standoffs: threaded-standoffs-metric and threaded-standoffs-hex-m4-m6-and-inch. Shaft spacers (Ø3 / Ø5 / Ø8): shaft-collars-clips-and-shafts. Essentra offers CAD per part on its site; McMaster-Carr sells unthreaded spacers (made to order and stock); both linked, not copied."
  ],
  "table": {
   "columns": [
    "maker / material",
    "ID (mm)",
    "OD (mm)",
    "lengths (mm)",
    "screw"
   ],
   "rows": [
    [
     "Essentra, brass",
     2.2,
     4,
     "10 (seen on three of the listing pages)",
     "M2 – M5 screw clearance by ID"
    ],
    [
     "Essentra, brass",
     2.5,
     5,
     "1, 2, 3, 5, 6, 7, 8, 20 (seen on three of the listing pages)",
     "M2 – M5 screw clearance by ID"
    ],
    [
     "Essentra, brass",
     3.2,
     6,
     "1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, 25, 30 (seen on three of the listing pages)",
     "M2 – M5 screw clearance by ID"
    ],
    [
     "Essentra, brass",
     4.3,
     8,
     "3, 5, 7, 8, 10, 12, 15, 25, 30, 35, 40 (seen on three of the listing pages)",
     "M2 – M5 screw clearance by ID"
    ],
    [
     "Essentra, brass",
     5.3,
     10,
     "2, 3, 4, 5, 6, 7, 8, 10, 15, 18, 30 (seen on three of the listing pages)",
     "M2 – M5 screw clearance by ID"
    ],
    [
     "JC Fasteners E5C18, aluminium 6061 (M2)",
     2.2,
     5,
     "3, 4, 5, 6, 8, 10, 12, 15, 20, 25",
     "M2 screw"
    ],
    [
     "JC Fasteners E5C18, aluminium 6061 (M2.5)",
     2.7,
     5,
     "3, 4, 5, 6, 8, 10, 12, 15, 20, 25, 30, 35, 40",
     "M2.5 screw"
    ],
    [
     "JC Fasteners E5C18, aluminium 6061 (M3)",
     3.2,
     5,
     "3, 4, 5, 6, 8, 10, 12, 15, 20, 25, 30, 35, 40, 45, 50",
     "M3 screw"
    ],
    [
     "JC Fasteners E5C18, aluminium 6061 (M4)",
     4.3,
     6,
     "4, 5, 6, 8, 10, 12, 15, 20, 25, 30, 35, 40, 45, 50",
     "M4 screw"
    ],
    [
     "JC Fasteners E5C18, aluminium 6061 (M5)",
     5.3,
     7,
     "5, 6, 8, 10, 12, 15, 20, 25, 30, 35, 40, 45, 50",
     "M5 screw"
    ],
    [
     "Keystone 3458, aluminium, clear Iridite",
     "3.048 mm bore (Newark; not on the Keystone page)",
     "0.250 in (6.35 mm)",
     "0.375 in (9.525 mm)",
     "#4 / M3"
    ],
    [
     "Keystone 4264, aluminium",
     "not listed on the pages read",
     "not listed on the pages read",
     "0.625 in (15.88 mm)",
     "#10"
    ],
    [
     "Keystone round clear-hole spacer family",
     "—",
     "0.250 or 0.312 in",
     "0.125 to 2 in",
     "#4, #6, #8, #10 clearance; aluminium, brass, nylon 6/6, phenolic; threaded or unthreaded"
    ]
   ]
  }
 },
 "sheet_text": "Unthreaded round spacers by ID and OD: M2–M5 brass and aluminium sleeve spacers (Essentra, JC Fasteners, Keystone) + 10 tube models — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/round-spacers-unthreaded-id-od/  (sheet CC BY 4.0)\nBasis: Essentra's brass round unthreaded spacer listing (three pages read), JC Fasteners' aluminium E5C18 data sheet (M2 to M5), Keystone Electronics' round clear-hole spacer datasheets; ten tube envelopes as files\nCatalog version: 2026-10-20\n\nOverall (mm): length 10.0, width 10.0, height 10.0\n- Millimetres unless marked. Round unthreaded spacers (sleeve spacers) by inside diameter, outside diameter and length. Essentra's brass spacers: ID / OD pairs 2.2 / 4.0, 2.5 / 5.0, 3.2 / 6.0, 4.3 / 8.0, 5.3 / 10.0; the lengths shown are those seen on three of the five listing pages (54 results in all), so they are examples, not the full range. JC Fasteners' E5C18 aluminium spacers: M2 2.2 / 5.0, M2.5 2.7 / 5.0, M3 3.2 / 5.0, M4 4.3 / 6.0, M5 5.3 / 7.0, with lengths 3 (or 4, 5) to 50 mm as listed; the sheet states no tolerances and says its data is informative.\n- The IDs are clearance sizes for the screw (2.2 for M2, 3.2 for M3, 4.3 for M4, 5.3 for M5, as the makers list them); the two makers differ in OD for the same bore (3.2 ID: OD 6.0 Essentra, OD 5.0 JC) and in the M2.5 ID (2.5 Essentra, 2.7 JC), so choose by the OD you need. Keystone's round clear-hole spacers (inch) have OD 0.250 or 0.312 in and lengths 0.125 to 2 in for #4, #6, #8 and #10 screws in aluminium, brass, nylon 6/6 or phenolic; part 3458 is 0.250 in OD × 0.375 in long (Newark lists a 3.048 mm bore for it; the Keystone page does not give the ID).\n- Files: ten plain tubes at the published ID and OD, drawn at an example length of 10 mm (Xem's choice; every size is available in more than one length). Chamfers, if any, are not published. Threaded standoffs: threaded-standoffs-metric and threaded-standoffs-hex-m4-m6-and-inch. Shaft spacers (Ø3 / Ø5 / Ø8): shaft-collars-clips-and-shafts. Essentra offers CAD per part on its site; McMaster-Carr sells unthreaded spacers (made to order and stock); both linked, not copied.\n\nmaker / material  ID (mm)  OD (mm)  lengths (mm)  screw\nEssentra, brass  2.2  4.0  10 (seen on three of the listing pages)  M2 – M5 screw clearance by ID\nEssentra, brass  2.5  5.0  1, 2, 3, 5, 6, 7, 8, 20 (seen on three of the listing pages)  M2 – M5 screw clearance by ID\nEssentra, brass  3.2  6.0  1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, 25, 30 (seen on three of the listing pages)  M2 – M5 screw clearance by ID\nEssentra, brass  4.3  8.0  3, 5, 7, 8, 10, 12, 15, 25, 30, 35, 40 (seen on three of the listing pages)  M2 – M5 screw clearance by ID\nEssentra, brass  5.3  10.0  2, 3, 4, 5, 6, 7, 8, 10, 15, 18, 30 (seen on three of the listing pages)  M2 – M5 screw clearance by ID\nJC Fasteners E5C18, aluminium 6061 (M2)  2.2  5.0  3, 4, 5, 6, 8, 10, 12, 15, 20, 25  M2 screw\nJC Fasteners E5C18, aluminium 6061 (M2.5)  2.7  5.0  3, 4, 5, 6, 8, 10, 12, 15, 20, 25, 30, 35, 40  M2.5 screw\nJC Fasteners E5C18, aluminium 6061 (M3)  3.2  5.0  3, 4, 5, 6, 8, 10, 12, 15, 20, 25, 30, 35, 40, 45, 50  M3 screw\nJC Fasteners E5C18, aluminium 6061 (M4)  4.3  6.0  4, 5, 6, 8, 10, 12, 15, 20, 25, 30, 35, 40, 45, 50  M4 screw\nJC Fasteners E5C18, aluminium 6061 (M5)  5.3  7.0  5, 6, 8, 10, 12, 15, 20, 25, 30, 35, 40, 45, 50  M5 screw\nKeystone 3458, aluminium, clear Iridite  3.048 mm bore (Newark; not on the Keystone page)  0.250 in (6.35 mm)  0.375 in (9.525 mm)  #4 / M3\nKeystone 4264, aluminium  not listed on the pages read  not listed on the pages read  0.625 in (15.88 mm)  #10\nKeystone round clear-hole spacer family  —  0.250 or 0.312 in  0.125 to 2 in  #4, #6, #8, #10 clearance; aluminium, brass, nylon 6/6, phenolic; threaded or unthreaded\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Essentra Components: Round unthreaded metal spacers (brass): inside diameter, outside diameter, length per part (54 results; three listing pages read) — web, CAD per part — Maker / distributor page; dimensions are facts [verify license at link] — https://www.essentracomponents.com/en-sg/p/round-unthreaded-metal-spacers\n- JC Fasteners (data sheet): Round spacer E5C18, aluminium 6061: M2 to M5 inner / outer diameter and lengths 3 to 50 mm — web — Maker data sheet; numbers only — https://www.jcfasteners.com/wp-content/uploads/Round-Spacer-E5C18-AL-6061.pdf\n- Keystone Electronics (datasheet via GlobalSpec) and Mouser: Round clear-hole spacers: OD 0.250 / 0.312 in, length 0.125 to 2 in, #4 / #6 / #8 / #10 clearance; part 3458 (aluminium, 0.250 OD, 0.375 long, #4 / M3) and 4264 (#10, 0.625 long) — web — Maker datasheet; numbers only — https://datasheets.globalspec.com/ds/keystone-electronics/3458/a34a0128-a131-4612-b7cc-9d1d32503ab1\n- McMaster-Carr: Unthreaded spacers (made to order and stock) (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/shims/made-to-order-unthreaded-spacers\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 10 parts): https://xemstudio.com/files/hardware/round-spacers-unthreaded-id-od/index.json\nAPI: https://xemstudio.com/api/geometry?object=round-spacers-unthreaded-id-od\n",
 "sources": [
  {
   "publisher": "Essentra Components",
   "title": "Round unthreaded metal spacers (brass): inside diameter, outside diameter, length per part (54 results; three listing pages read)",
   "url": "https://www.essentracomponents.com/en-sg/p/round-unthreaded-metal-spacers",
   "formats": [
    "web",
    "CAD per part"
   ],
   "license": "Maker / distributor page; dimensions are facts",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "JC Fasteners (data sheet)",
   "title": "Round spacer E5C18, aluminium 6061: M2 to M5 inner / outer diameter and lengths 3 to 50 mm",
   "url": "https://www.jcfasteners.com/wp-content/uploads/Round-Spacer-E5C18-AL-6061.pdf",
   "formats": [
    "web"
   ],
   "license": "Maker data sheet; numbers only",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Keystone Electronics (datasheet via GlobalSpec) and Mouser",
   "title": "Round clear-hole spacers: OD 0.250 / 0.312 in, length 0.125 to 2 in, #4 / #6 / #8 / #10 clearance; part 3458 (aluminium, 0.250 OD, 0.375 long, #4 / M3) and 4264 (#10, 0.625 long)",
   "url": "https://datasheets.globalspec.com/ds/keystone-electronics/3458/a34a0128-a131-4612-b7cc-9d1d32503ab1",
   "formats": [
    "web"
   ],
   "license": "Maker datasheet; numbers only",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "McMaster-Carr",
   "title": "Unthreaded spacers (made to order and stock) (free STEP/IGES per part, for your own design use; no redistribution)",
   "url": "https://www.mcmaster.com/products/shims/made-to-order-unthreaded-spacers",
   "formats": [
    "STEP",
    "IGES",
    "PDF"
   ],
   "license": "McMaster-Carr site terms: personal design use, no redistribution",
   "license_verified": false,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "threaded-standoffs-metric",
  "threaded-standoffs-hex-m4-m6-and-inch",
  "metric-shafts",
  "flat-washers-metric",
  "heat-set-inserts",
  "socket-head-cap-screws-metric",
  "imperial-machine-screws"
 ],
 "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": "bore",
   "exact": "Ø2.2 / 2.5 / 3.2 / 4.3 / 5.3 mm (Essentra) and 2.2 / 2.7 / 3.2 / 4.3 / 5.3 mm (JC Fasteners) for M2 to M5",
   "mates": "screw or bolt of the matching size passing through the spacer (these are clearance holes sized to the screw)",
   "fit": "slide",
   "files": "round-spacer-"
  },
  {
   "feature": "outside",
   "exact": "Ø4 to 10 mm (Essentra), Ø5 to 7 mm (JC)",
   "mates": "housing bore or counterbore around the spacer, if recessed",
   "fit": "slide",
   "files": "round-spacer-"
  },
  {
   "feature": "length",
   "exact": "example 10 mm (Xem's choice); real lengths 1 to 40 mm (Essentra seen) and 3 to 50 mm (JC)",
   "mates": "gap between the two parts it holds apart",
   "fit": "designed",
   "files": "round-spacer-"
  }
 ],
 "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 spacer fits an M3 screw?",
   "a": "ID 3.2 mm: OD 6.0 mm (Essentra brass) or 5.0 mm (JC Fasteners aluminium), lengths from 1 or 3 mm up to 30 or 50 mm."
  },
  {
   "q": "What is the OD of an M4 spacer?",
   "a": "8.0 mm for Essentra's brass spacer (ID 4.3) and 6.0 mm for JC Fasteners' aluminium E5C18 (ID 4.3)."
  },
  {
   "q": "What size is a Keystone #4 round spacer?",
   "a": "0.250 in OD; part 3458 is 0.375 in long, aluminium, #4 / M3 clearance."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "round-spacer-id2p2-od4-x10-essentra",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/round-spacers-unthreaded-id-od/round-spacer-id2p2-od4-x10-essentra.step",
   "stl": "https://xemstudio.com/files/hardware/round-spacers-unthreaded-id-od/round-spacer-id2p2-od4-x10-essentra.stl",
   "note": "unthreaded round spacer tube: ID Ø2.2, OD Ø4 mm (Essentra brass size), example length 10 mm (Xem's choice); plain tube, no chamfer"
  },
  {
   "file": "round-spacer-id2p5-od5-x10-essentra",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/round-spacers-unthreaded-id-od/round-spacer-id2p5-od5-x10-essentra.step",
   "stl": "https://xemstudio.com/files/hardware/round-spacers-unthreaded-id-od/round-spacer-id2p5-od5-x10-essentra.stl",
   "note": "unthreaded round spacer tube: ID Ø2.5, OD Ø5 mm (Essentra brass size), example length 10 mm (Xem's choice); plain tube, no chamfer"
  },
  {
   "file": "round-spacer-id3p2-od6-x10-essentra",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/round-spacers-unthreaded-id-od/round-spacer-id3p2-od6-x10-essentra.step",
   "stl": "https://xemstudio.com/files/hardware/round-spacers-unthreaded-id-od/round-spacer-id3p2-od6-x10-essentra.stl",
   "note": "unthreaded round spacer tube: ID Ø3.2, OD Ø6 mm (Essentra brass size), example length 10 mm (Xem's choice); plain tube, no chamfer"
  },
  {
   "file": "round-spacer-id4p3-od8-x10-essentra",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/round-spacers-unthreaded-id-od/round-spacer-id4p3-od8-x10-essentra.step",
   "stl": "https://xemstudio.com/files/hardware/round-spacers-unthreaded-id-od/round-spacer-id4p3-od8-x10-essentra.stl",
   "note": "unthreaded round spacer tube: ID Ø4.3, OD Ø8 mm (Essentra brass size), example length 10 mm (Xem's choice); plain tube, no chamfer"
  },
  {
   "file": "round-spacer-id5p3-od10-x10-essentra",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/round-spacers-unthreaded-id-od/round-spacer-id5p3-od10-x10-essentra.step",
   "stl": "https://xemstudio.com/files/hardware/round-spacers-unthreaded-id-od/round-spacer-id5p3-od10-x10-essentra.stl",
   "note": "unthreaded round spacer tube: ID Ø5.3, OD Ø10 mm (Essentra brass size), example length 10 mm (Xem's choice); plain tube, no chamfer"
  },
  {
   "file": "round-spacer-id2p2-od5-x10-jc",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/round-spacers-unthreaded-id-od/round-spacer-id2p2-od5-x10-jc.step",
   "stl": "https://xemstudio.com/files/hardware/round-spacers-unthreaded-id-od/round-spacer-id2p2-od5-x10-jc.stl",
   "note": "unthreaded round spacer tube: ID Ø2.2, OD Ø5 mm (JC Fasteners aluminium size), example length 10 mm (Xem's choice); plain tube, no chamfer"
  },
  {
   "file": "round-spacer-id2p7-od5-x10-jc",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/round-spacers-unthreaded-id-od/round-spacer-id2p7-od5-x10-jc.step",
   "stl": "https://xemstudio.com/files/hardware/round-spacers-unthreaded-id-od/round-spacer-id2p7-od5-x10-jc.stl",
   "note": "unthreaded round spacer tube: ID Ø2.7, OD Ø5 mm (JC Fasteners aluminium size), example length 10 mm (Xem's choice); plain tube, no chamfer"
  },
  {
   "file": "round-spacer-id3p2-od5-x10-jc",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/round-spacers-unthreaded-id-od/round-spacer-id3p2-od5-x10-jc.step",
   "stl": "https://xemstudio.com/files/hardware/round-spacers-unthreaded-id-od/round-spacer-id3p2-od5-x10-jc.stl",
   "note": "unthreaded round spacer tube: ID Ø3.2, OD Ø5 mm (JC Fasteners aluminium size), example length 10 mm (Xem's choice); plain tube, no chamfer"
  },
  {
   "file": "round-spacer-id4p3-od6-x10-jc",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/round-spacers-unthreaded-id-od/round-spacer-id4p3-od6-x10-jc.step",
   "stl": "https://xemstudio.com/files/hardware/round-spacers-unthreaded-id-od/round-spacer-id4p3-od6-x10-jc.stl",
   "note": "unthreaded round spacer tube: ID Ø4.3, OD Ø6 mm (JC Fasteners aluminium size), example length 10 mm (Xem's choice); plain tube, no chamfer"
  },
  {
   "file": "round-spacer-id5p3-od7-x10-jc",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/round-spacers-unthreaded-id-od/round-spacer-id5p3-od7-x10-jc.step",
   "stl": "https://xemstudio.com/files/hardware/round-spacers-unthreaded-id-od/round-spacer-id5p3-od7-x10-jc.stl",
   "note": "unthreaded round spacer tube: ID Ø5.3, OD Ø7 mm (JC Fasteners aluminium size), example length 10 mm (Xem's choice); plain tube, no chamfer"
  }
 ],
 "markdown": "https://xemstudio.com/objects/round-spacers-unthreaded-id-od/index.md"
}