{
 "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": "orfs-sae-j1453-o-ring-face-seal-ends",
 "name": "ORFS O-ring face seal fittings (SAE J1453), dash -4 to -24: thread, tube OD, O-ring size, nut hex + lock-nut envelopes",
 "kind": "standard",
 "category": "Tri-clamp & pipe",
 "group": "Pipe, tube & threads",
 "year": null,
 "question": "What thread, O-ring and wrench size is an ORFS -6 or -8 fitting?",
 "tags": [
  "orfs",
  "o-ring face seal",
  "flat face o-ring",
  "ffs",
  "sae j1453",
  "seal-lok",
  "hydraulic fitting",
  "tube fitting",
  "face seal",
  "hydraulic"
 ],
 "aliases": [
  "orfs -8 thread size",
  "orfs o-ring size -6",
  "orfs vs jic",
  "13/16-16 orfs fitting",
  "orfs dash size chart",
  "orfs o-ring 2-014",
  "11/16-16 orfs thread",
  "sae j1453 face seal dimensions",
  "orfs nut hex size",
  "orfs bulkhead lock nut size",
  "o-ring face seal -12 thread 1-3/16-12",
  "orfs 1-14 -10 o-ring",
  "orfs vs orb"
 ],
 "overall_mm": {
  "length": 69.7,
  "width": 60.3,
  "height": 10.4
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 8,
 "url": "https://xemstudio.com/objects/orfs-sae-j1453-o-ring-face-seal-ends/",
 "sheet_txt": "https://xemstudio.com/objects/orfs-sae-j1453-o-ring-face-seal-ends/sheet.txt",
 "sheet": {
  "basis": "Brennan's ORFS catalog (nut, bulkhead lock nut and union dimensions), hoseandfittings' J1453 thread table and Parker's TFD O-ring sheet; eight lock-nut envelopes as files",
  "overall_mm": {
   "length": 69.7,
   "width": 60.3,
   "height": 10.4
  },
  "notes": [
   "SAE J1453 O-ring face seal (ORFS, 'flat face O-ring', Seal-Lok in Parker's naming): a flat-faced male end carries an O-ring in a groove, and a swivel nut with a UN thread pulls it against the flat face of the mating end. The dash number is the tube OD in sixteenths of an inch, as for AN / JIC (-8 = 1/2 in), but the thread is different from the AN / JIC and SAE O-ring boss thread at most sizes: -4 is 9/16-18, -6 11/16-16, -8 13/16-16, -10 1-14, -12 1 3/16-12, -16 1 7/16-12, -20 1 11/16-12, -24 2-12. ORFS and 37° flare or O-ring boss ends do not interchange even where a thread size happens to coincide (9/16-18 is -4 ORFS and -6 AN).",
   "Brennan's ORFS catalog (the source of the thread, nut hex, nut width and union hex): the nut (FS0318) lists thread A, hex B and width Q; the bulkhead lock nut (FS0306) lists thread A, hex B and width TT; the same-size straight union (FS2403, male-to-male) lists hex H. All are in inches as printed (mm are Xem's conversions at 25.4). Thread and hex sizes are the same across the sizes Brennan lists. hoseandfittings' 'flat face O-ring (FFS), SAE J1453' table gives the male thread OD and female thread ID per dash (its 1 in row prints the female ID as '1-3/4 (1.36)', which looks like a typo for 1-5/16; reproduced as printed).",
   "O-rings: Parker Tube Fittings Division's TFD O-ring sheet lists the ORFS face-seal O-ring for each dash as AS568 2-011 (-4), 2-012 (-6), 2-014 (-8), 2-016 (-10), 2-018 (-12), 2-020 (-14), 2-021 (-16), 2-025 (-20), 2-029 (-24) and 2-135 (-32), ID and W in inches and mm as printed (W 0.07 in / 1.78 mm up to -24, 0.10 / 2.54 for the -32). Dash -14 and -32 are not in the Brennan catalog's tables read, so their threads and hexes are left out.",
   "Files: eight bulkhead lock-nut envelopes (dash -4 to -24): a hex prism of the published across-flats and width with a plain bore at the thread's nominal major diameter. They are envelopes: chamfers and the real thread are not drawn. Only Brennan prints the nut hex, width and lock-nut figures, so these come from one maker's catalog. The male ORFS end (groove, flat face, tube stub) and the swivel nut's tube lip are not published as numbers in the sources read, so no end solid is drawn.",
   "Related: AN / JIC 37° flare (an-jic-37-degree-flare-fittings), SAE 45° flare (sae-45-degree-flare-nuts-and-threads), O-ring boss ports (sae-j1926-iso-11926-o-ring-boss-ports). McMaster-Carr sells ORFS fittings with per-part STEP; no per-part link was read."
  ],
  "table": {
   "columns": [
    "dash",
    "tube OD (in)",
    "thread (UN)",
    "nut hex B (FS0318)",
    "nut width Q (in)",
    "lock nut hex B (FS0306)",
    "lock nut width TT (in)",
    "union hex H (FS2403, in)",
    "male thread OD / female ID (in, as printed)",
    "face-seal O-ring (Parker, AS568)"
   ],
   "rows": [
    [
     "-4",
     "1/4",
     "9/16-18",
     "0.687 in (17.45 mm)",
     "0.580",
     "0.812 in (20.62 mm)",
     "0.270",
     "0.625",
     "9/16 (0.56) / 17/32 (0.51)",
     "2-011 (ID 0.30 / 7.7 in / mm, W 0.07 / 1.78)"
    ],
    [
     "-6",
     "3/8",
     "11/16-16",
     "0.812 in (20.62 mm)",
     "0.670",
     "1.000 in (25.40 mm)",
     "0.310",
     "0.750",
     "11/16 (0.69) / 5/8 (0.63)",
     "2-012 (ID 0.36 / 9.3 in / mm, W 0.07 / 1.78)"
    ],
    [
     "-8",
     "1/2",
     "13/16-16",
     "0.938 in (23.83 mm)",
     "0.827",
     "1.125 in (28.57 mm)",
     "0.350",
     "0.875",
     "13/16 (0.82) / 3/4 (0.75)",
     "2-014 (ID 0.49 / 12.4 in / mm, W 0.07 / 1.78)"
    ],
    [
     "-10",
     "5/8",
     "1-14",
     "1.125 in (28.57 mm)",
     "0.925",
     "1.312 in (33.32 mm)",
     "0.410",
     "1.062",
     "1 (1.00) / 15/16 (0.93)",
     "2-016 (ID 0.61 / 15.6 in / mm, W 0.07 / 1.78)"
    ],
    [
     "-12",
     "3/4",
     "1 3/16-12",
     "1.375 in (34.92 mm)",
     "1.024",
     "1.500 in (38.10 mm)",
     "0.410",
     "1.250",
     "1-3/16 (1.19) / 1-1/8 (1.11)",
     "2-018 (ID 0.74 / 18.8 in / mm, W 0.07 / 1.78)"
    ],
    [
     "-16",
     "1",
     "1 7/16-12",
     "1.625 in (41.27 mm)",
     "1.095",
     "1.750 in (44.45 mm)",
     "0.410",
     "1.500",
     "1-7/16 (1.44) / 1-3/4 [sic] (1.36)",
     "2-021 (ID 0.93 / 23.5 in / mm, W 0.07 / 1.78)"
    ],
    [
     "-20",
     "1 1/4",
     "1 11/16-12",
     "1.875 in (47.62 mm)",
     "1.095",
     "2.000 in (50.80 mm)",
     "0.410",
     "1.750",
     "1-11/16 (1.69) / 1-5/8 (1.61)",
     "2-025 (ID 1.18 / 29.9 in / mm, W 0.07 / 1.78)"
    ],
    [
     "-24",
     "1 1/2",
     "2-12",
     "2.250 in (57.15 mm)",
     "1.095",
     "2.375 in (60.32 mm)",
     "0.410",
     "2.125",
     "2 (2.00) / 1-15/16 (1.92)",
     "2-029 (ID 1.49 / 37.8 in / mm, W 0.07 / 1.78)"
    ]
   ]
  }
 },
 "sheet_text": "ORFS O-ring face seal fittings (SAE J1453), dash -4 to -24: thread, tube OD, O-ring size, nut hex + lock-nut envelopes — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/orfs-sae-j1453-o-ring-face-seal-ends/  (sheet CC BY 4.0)\nBasis: Brennan's ORFS catalog (nut, bulkhead lock nut and union dimensions), hoseandfittings' J1453 thread table and Parker's TFD O-ring sheet; eight lock-nut envelopes as files\nCatalog version: 2026-10-20\n\nOverall (mm): length 69.7, width 60.3, height 10.4\n- SAE J1453 O-ring face seal (ORFS, 'flat face O-ring', Seal-Lok in Parker's naming): a flat-faced male end carries an O-ring in a groove, and a swivel nut with a UN thread pulls it against the flat face of the mating end. The dash number is the tube OD in sixteenths of an inch, as for AN / JIC (-8 = 1/2 in), but the thread is different from the AN / JIC and SAE O-ring boss thread at most sizes: -4 is 9/16-18, -6 11/16-16, -8 13/16-16, -10 1-14, -12 1 3/16-12, -16 1 7/16-12, -20 1 11/16-12, -24 2-12. ORFS and 37° flare or O-ring boss ends do not interchange even where a thread size happens to coincide (9/16-18 is -4 ORFS and -6 AN).\n- Brennan's ORFS catalog (the source of the thread, nut hex, nut width and union hex): the nut (FS0318) lists thread A, hex B and width Q; the bulkhead lock nut (FS0306) lists thread A, hex B and width TT; the same-size straight union (FS2403, male-to-male) lists hex H. All are in inches as printed (mm are Xem's conversions at 25.4). Thread and hex sizes are the same across the sizes Brennan lists. hoseandfittings' 'flat face O-ring (FFS), SAE J1453' table gives the male thread OD and female thread ID per dash (its 1 in row prints the female ID as '1-3/4 (1.36)', which looks like a typo for 1-5/16; reproduced as printed).\n- O-rings: Parker Tube Fittings Division's TFD O-ring sheet lists the ORFS face-seal O-ring for each dash as AS568 2-011 (-4), 2-012 (-6), 2-014 (-8), 2-016 (-10), 2-018 (-12), 2-020 (-14), 2-021 (-16), 2-025 (-20), 2-029 (-24) and 2-135 (-32), ID and W in inches and mm as printed (W 0.07 in / 1.78 mm up to -24, 0.10 / 2.54 for the -32). Dash -14 and -32 are not in the Brennan catalog's tables read, so their threads and hexes are left out.\n- Files: eight bulkhead lock-nut envelopes (dash -4 to -24): a hex prism of the published across-flats and width with a plain bore at the thread's nominal major diameter. They are envelopes: chamfers and the real thread are not drawn. Only Brennan prints the nut hex, width and lock-nut figures, so these come from one maker's catalog. The male ORFS end (groove, flat face, tube stub) and the swivel nut's tube lip are not published as numbers in the sources read, so no end solid is drawn.\n- Related: AN / JIC 37° flare (an-jic-37-degree-flare-fittings), SAE 45° flare (sae-45-degree-flare-nuts-and-threads), O-ring boss ports (sae-j1926-iso-11926-o-ring-boss-ports). McMaster-Carr sells ORFS fittings with per-part STEP; no per-part link was read.\n\ndash  tube OD (in)  thread (UN)  nut hex B (FS0318)  nut width Q (in)  lock nut hex B (FS0306)  lock nut width TT (in)  union hex H (FS2403, in)  male thread OD / female ID (in, as printed)  face-seal O-ring (Parker, AS568)\n-4  1/4  9/16-18  0.687 in (17.45 mm)  0.580  0.812 in (20.62 mm)  0.270  0.625  9/16 (0.56) / 17/32 (0.51)  2-011 (ID 0.30 / 7.7 in / mm, W 0.07 / 1.78)\n-6  3/8  11/16-16  0.812 in (20.62 mm)  0.670  1.000 in (25.40 mm)  0.310  0.750  11/16 (0.69) / 5/8 (0.63)  2-012 (ID 0.36 / 9.3 in / mm, W 0.07 / 1.78)\n-8  1/2  13/16-16  0.938 in (23.83 mm)  0.827  1.125 in (28.57 mm)  0.350  0.875  13/16 (0.82) / 3/4 (0.75)  2-014 (ID 0.49 / 12.4 in / mm, W 0.07 / 1.78)\n-10  5/8  1-14  1.125 in (28.57 mm)  0.925  1.312 in (33.32 mm)  0.410  1.062  1 (1.00) / 15/16 (0.93)  2-016 (ID 0.61 / 15.6 in / mm, W 0.07 / 1.78)\n-12  3/4  1 3/16-12  1.375 in (34.92 mm)  1.024  1.500 in (38.10 mm)  0.410  1.250  1-3/16 (1.19) / 1-1/8 (1.11)  2-018 (ID 0.74 / 18.8 in / mm, W 0.07 / 1.78)\n-16  1  1 7/16-12  1.625 in (41.27 mm)  1.095  1.750 in (44.45 mm)  0.410  1.500  1-7/16 (1.44) / 1-3/4 [sic] (1.36)  2-021 (ID 0.93 / 23.5 in / mm, W 0.07 / 1.78)\n-20  1 1/4  1 11/16-12  1.875 in (47.62 mm)  1.095  2.000 in (50.80 mm)  0.410  1.750  1-11/16 (1.69) / 1-5/8 (1.61)  2-025 (ID 1.18 / 29.9 in / mm, W 0.07 / 1.78)\n-24  1 1/2  2-12  2.250 in (57.15 mm)  1.095  2.375 in (60.32 mm)  0.410  2.125  2 (2.00) / 1-15/16 (1.92)  2-029 (ID 1.49 / 37.8 in / mm, W 0.07 / 1.78)\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Brennan Industries: ORFS catalog: nut FS0318 (thread, hex, width), bulkhead lock nut FS0306 (thread, hex, width), straight FS2403 (hex) — web — Maker catalog; numbers only — https://irp.cdn-website.com/8b2b97ee/files/uploaded/Brennan+ORFS+Catalog.pdf\n- hoseandfittings.com: Flat Face O-Ring (FFS), SAE J1453: dash size, nominal thread, male thread OD, female thread ID — web — Distributor page; numbers only — https://hoseandfittings.com/?p=21040\n- Parker Tube Fittings Division (hosted by Wilson Company): O-rings and seals: ORFS, SAE boss, ISO 6149, SAE 4-bolt flange O-ring sizes (ID, W) — web — Maker catalog pages; numbers only — https://wilson-company.com/images/document/TFD/O-Rings___Seals.pdf\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 8 parts): https://xemstudio.com/files/hardware/orfs-sae-j1453-o-ring-face-seal-ends/index.json\nAPI: https://xemstudio.com/api/geometry?object=orfs-sae-j1453-o-ring-face-seal-ends\n",
 "sources": [
  {
   "publisher": "Brennan Industries",
   "title": "ORFS catalog: nut FS0318 (thread, hex, width), bulkhead lock nut FS0306 (thread, hex, width), straight FS2403 (hex)",
   "url": "https://irp.cdn-website.com/8b2b97ee/files/uploaded/Brennan+ORFS+Catalog.pdf",
   "formats": [
    "web"
   ],
   "license": "Maker catalog; numbers only",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "hoseandfittings.com",
   "title": "Flat Face O-Ring (FFS), SAE J1453: dash size, nominal thread, male thread OD, female thread ID",
   "url": "https://hoseandfittings.com/?p=21040",
   "formats": [
    "web"
   ],
   "license": "Distributor page; numbers only",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Parker Tube Fittings Division (hosted by Wilson Company)",
   "title": "O-rings and seals: ORFS, SAE boss, ISO 6149, SAE 4-bolt flange O-ring sizes (ID, W)",
   "url": "https://wilson-company.com/images/document/TFD/O-Rings___Seals.pdf",
   "formats": [
    "web"
   ],
   "license": "Maker catalog pages; numbers only",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "an-jic-37-degree-flare-fittings",
  "sae-45-degree-flare-nuts-and-threads",
  "sae-j1926-iso-11926-o-ring-boss-ports",
  "as568-o-rings",
  "brass-compression-nuts-inch",
  "sae-j518-iso-6162-4-bolt-flange-ports"
 ],
 "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 (plain hole at the nominal major)",
   "exact": "Ø14.29 / 17.46 / 20.64 / 25.40 / 30.16 / 36.51 / 42.86 / 50.80 mm for dash -4 / -6 / -8 / -10 / -12 / -16 / -20 / -24",
   "mates": "the male ORFS tube-end or bulkhead body thread (9/16-18 to 2-12 UN); the real nut is threaded, the file is a plain hole at the thread's nominal major",
   "fit": "designed",
   "files": "orfs-bulkhead-lock-nut-"
  }
 ],
 "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 thread is an ORFS -8 fitting?",
   "a": "13/16-16 UN (Brennan and hoseandfittings), for 1/2 in tube; the face-seal O-ring is AS568 2-014 (ID 0.49 in, W 0.07 in)."
  },
  {
   "q": "Is ORFS -6 the same thread as JIC -6?",
   "a": "No. ORFS -6 is 11/16-16; AN / JIC -6 and SAE O-ring boss -6 are 9/16-18. The 9/16-18 thread is ORFS -4."
  },
  {
   "q": "What wrench size is an ORFS -10 nut?",
   "a": "Brennan's FS0318 nut is 1.125 in (28.58 mm) across flats and 0.925 in wide; its bulkhead lock nut is 1.312 in across flats."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "orfs-bulkhead-lock-nut-4-9-16-18",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/orfs-sae-j1453-o-ring-face-seal-ends/orfs-bulkhead-lock-nut-4-9-16-18.step",
   "stl": "https://xemstudio.com/files/hardware/orfs-sae-j1453-o-ring-face-seal-ends/orfs-bulkhead-lock-nut-4-9-16-18.stl",
   "note": "ORFS bulkhead lock-nut envelope, dash -4: hex 0.812 in (20.62 mm) across flats × 0.270 in (6.86 mm) thick (Brennan FS0306-04), plain bore Ø14.29 at the nominal major diameter of 9/16-18 (a plain hole in place of the thread); no chamfers"
  },
  {
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   "stl": "https://xemstudio.com/files/hardware/orfs-sae-j1453-o-ring-face-seal-ends/orfs-bulkhead-lock-nut-6-11-16-16.stl",
   "note": "ORFS bulkhead lock-nut envelope, dash -6: hex 1.000 in (25.40 mm) across flats × 0.310 in (7.87 mm) thick (Brennan FS0306-06), plain bore Ø17.46 at the nominal major diameter of 11/16-16 (a plain hole in place of the thread); no chamfers"
  },
  {
   "file": "orfs-bulkhead-lock-nut-8-13-16-16",
   "formats": [
    "step",
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   ],
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   "stl": "https://xemstudio.com/files/hardware/orfs-sae-j1453-o-ring-face-seal-ends/orfs-bulkhead-lock-nut-8-13-16-16.stl",
   "note": "ORFS bulkhead lock-nut envelope, dash -8: hex 1.125 in (28.57 mm) across flats × 0.350 in (8.89 mm) thick (Brennan FS0306-08), plain bore Ø20.64 at the nominal major diameter of 13/16-16 (a plain hole in place of the thread); no chamfers"
  },
  {
   "file": "orfs-bulkhead-lock-nut-10-1-14",
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    "step",
    "stl"
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   "stl": "https://xemstudio.com/files/hardware/orfs-sae-j1453-o-ring-face-seal-ends/orfs-bulkhead-lock-nut-10-1-14.stl",
   "note": "ORFS bulkhead lock-nut envelope, dash -10: hex 1.312 in (33.32 mm) across flats × 0.410 in (10.41 mm) thick (Brennan FS0306-10), plain bore Ø25.40 at the nominal major diameter of 1-14 (a plain hole in place of the thread); no chamfers"
  },
  {
   "file": "orfs-bulkhead-lock-nut-12-1_3-16-12",
   "formats": [
    "step",
    "stl"
   ],
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   "stl": "https://xemstudio.com/files/hardware/orfs-sae-j1453-o-ring-face-seal-ends/orfs-bulkhead-lock-nut-12-1_3-16-12.stl",
   "note": "ORFS bulkhead lock-nut envelope, dash -12: hex 1.500 in (38.10 mm) across flats × 0.410 in (10.41 mm) thick (Brennan FS0306-12), plain bore Ø30.16 at the nominal major diameter of 1 3/16-12 (a plain hole in place of the thread); no chamfers"
  },
  {
   "file": "orfs-bulkhead-lock-nut-16-1_7-16-12",
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   "step": "https://xemstudio.com/files/hardware/orfs-sae-j1453-o-ring-face-seal-ends/orfs-bulkhead-lock-nut-16-1_7-16-12.step",
   "stl": "https://xemstudio.com/files/hardware/orfs-sae-j1453-o-ring-face-seal-ends/orfs-bulkhead-lock-nut-16-1_7-16-12.stl",
   "note": "ORFS bulkhead lock-nut envelope, dash -16: hex 1.750 in (44.45 mm) across flats × 0.410 in (10.41 mm) thick (Brennan FS0306-16), plain bore Ø36.51 at the nominal major diameter of 1 7/16-12 (a plain hole in place of the thread); no chamfers"
  },
  {
   "file": "orfs-bulkhead-lock-nut-20-1_11-16-12",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/orfs-sae-j1453-o-ring-face-seal-ends/orfs-bulkhead-lock-nut-20-1_11-16-12.step",
   "stl": "https://xemstudio.com/files/hardware/orfs-sae-j1453-o-ring-face-seal-ends/orfs-bulkhead-lock-nut-20-1_11-16-12.stl",
   "note": "ORFS bulkhead lock-nut envelope, dash -20: hex 2.000 in (50.80 mm) across flats × 0.410 in (10.41 mm) thick (Brennan FS0306-20), plain bore Ø42.86 at the nominal major diameter of 1 11/16-12 (a plain hole in place of the thread); no chamfers"
  },
  {
   "file": "orfs-bulkhead-lock-nut-24-2-12",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/orfs-sae-j1453-o-ring-face-seal-ends/orfs-bulkhead-lock-nut-24-2-12.step",
   "stl": "https://xemstudio.com/files/hardware/orfs-sae-j1453-o-ring-face-seal-ends/orfs-bulkhead-lock-nut-24-2-12.stl",
   "note": "ORFS bulkhead lock-nut envelope, dash -24: hex 2.375 in (60.32 mm) across flats × 0.410 in (10.41 mm) thick (Brennan FS0306-24), plain bore Ø50.80 at the nominal major diameter of 2-12 (a plain hole in place of the thread); no chamfers"
  }
 ],
 "markdown": "https://xemstudio.com/objects/orfs-sae-j1453-o-ring-face-seal-ends/index.md"
}