{
  "product": {
    "mpn": "DCD21-8-5-A",
    "manufacturer": "Ruland",
    "brand": "Ruland",
    "title": "DCD21-8-5-A, 1/2\" x 5/16\" Double Disc Coupling, Aluminum | Ruland",
    "description": "",
    "attributes": {
      "Brand name": "Ruland",
      "Manufacturer name": "Ruland",
      "Manufacturer": "Ruland",
      "Attribute00": "0.5000 in",
      "Attribute01": "0.3125 in",
      "Attribute02": "0.354 in",
      "Attribute03": "0.354 in",
      "Attribute04": "0.842 in",
      "Attribute05": "0.842 in",
      "Attribute06": "1.313 in",
      "Attribute07": "+0.001 in / -0.000 in",
      "Attribute08": "1.770 in",
      "Attribute09": "0.590 in",
      "Attribute10": "+0.0000 in / -0.0005 in",
      "Attribute11": "M3",
      "Attribute12": "Alloy Steel",
      "Attribute13": "2.5 mm",
      "Attribute14": "Black Oxide",
      "Attribute15": "2.1 Nm",
      "Attribute16": "2 ea",
      "Attribute17": "25 lb-in",
      "Attribute18": "2.0°",
      "Attribute19": "50 lb-in",
      "Attribute20": "0.008 in",
      "Attribute21": "100 lb-in",
      "Attribute22": "0.016 in",
      "Attribute23": "253 lb-in/Deg",
      "Attribute24": "0.0443 lb-in",
      "Attribute25": "10,000 RPM",
      "Attribute26": "Yes",
      "Attribute27": "Yes",
      "Attribute28": "Yes",
      "Attribute31": "Hubs and Center Spacer: 2024-T351 Aluminum Bar",
      "Attribute32": "-40°F to 200°F (-40°C to 93°C)",
      "Attribute33": "Sulfuric Anodized MIL-A-8625 Type II, Class 2 and ASTM B580 Type B Black Anodize",
      "Attribute34": "Ruland Manufacturing",
      "Attribute35": "USA",
      "Attribute36": "0.182700",
      "Attribute37": "634529081778",
      "Attribute38": "8483.60.8000",
      "Attribute39": "31163008",
      "Attribute40": "Stainless steel hubs are available upon request.",
      "Attribute41": "Torque ratings are at maximum misalignment.",
      "Attribute42": "Performance ratings are for guidance only. The user must determine suitability for a particular application.",
      "Attribute43": "Torque ratings for the couplings are based on the physical limitations/failure point of the disc springs. Under normal/typical conditions the hubs are capable of holding up to the rated torque of the disc springs. In some cases, especially when the smallest standard bores are used or where shafts are undersized, slippage on the shaft is possible below the rated torque of the disc springs. Keyways are available to provide additional torque capacity in the shaft/hub connection when required. Please consult technical support for more assistance.",
      "AttributeKey00": "Bore (B1)",
      "AttributeKey01": "Small Bore (B2)",
      "AttributeKey02": "B1 Min Shaft Penetration",
      "AttributeKey03": "B2 Min Shaft Penetration",
      "AttributeKey04": "B1 Max Shaft Penetration",
      "AttributeKey05": "B2 Max Shaft Penetration",
      "AttributeKey06": "Outer Diameter (OD)",
      "AttributeKey07": "Bore Tolerance",
      "AttributeKey08": "Length (L)",
      "AttributeKey09": "Hub Width (LH)",
      "AttributeKey10": "Recommended Shaft Tolerance",
      "AttributeKey11": "Forged Clamp Screw",
      "AttributeKey12": "Screw Material",
      "AttributeKey13": "Hex Wrench Size",
      "AttributeKey14": "Screw Finish",
      "AttributeKey15": "Seating Torque",
      "AttributeKey16": "Number of Screws",
      "AttributeKey17": "Dynamic Torque Reversing",
      "AttributeKey18": "Angular Misalignment",
      "AttributeKey19": "Dynamic Torque Non-Reversing",
      "AttributeKey20": "Parallel Misalignment",
      "AttributeKey21": "Static Torque",
      "AttributeKey22": "Axial Motion",
      "AttributeKey23": "Torsional Stiffness",
      "AttributeKey24": "Moment of Inertia",
      "AttributeKey25": "Maximum Speed",
      "AttributeKey26": "Full Bearing Support Required?",
      "AttributeKey27": "Zero-Backlash?",
      "AttributeKey28": "Balanced Design",
      "AttributeKey29": "Torque Wrench",
      "AttributeKey30": "Recommended Hex Key",
      "AttributeKey31": "Material Specification",
      "AttributeKey32": "Temperature",
      "AttributeKey33": "Finish Specification",
      "AttributeKey34": "Manufacturer",
      "AttributeKey35": "Country of Origin",
      "AttributeKey36": "Weight (lbs)",
      "AttributeKey37": "UPC",
      "AttributeKey38": "Tariff Code",
      "AttributeKey39": "UNSPC",
      "AttributeKey40": "Note 1",
      "AttributeKey41": "Note 2",
      "AttributeKey42": "Note 3",
      "AttributeKey43": "Note 4",
      "AttributeKey44": "Prop 65",
      "DimensionUnit": "inch",
      "Extra Product Name": "DCD21-8-5-A, 1/2\" x 5/16\" Double Disc Coupling, Aluminum | Ruland",
      "Weight": "0.182700",
      "WeightUnit": "lbs",
      "Weight_Attrib": "Weight (lbs)",
      "diameter": "1.313",
      "height": "1.313",
      "height_Attrib": "Outer Diameter (OD)",
      "keywords": "DCD21-8-5-A, Double Disc Coupling",
      "length": "1.77",
      "length_Attrib": "Length (L)",
      "moq": "1",
      "MPN": "DCD21-8-5-A",
      "multiple": "1",
      "qtyInStock": "-2",
      "qtySource": "FieldMap",
      "SKU": "DCD21-8-5-A",
      "snippet": "Ruland part number DCD21-8-5-A is an aluminum double disc coupling with 1/2\" x 5/16\" bores. Download a 2D/3D CAD file or purchase the DCD21-8-5-A directly from the manufacturer.",
      "tierMinQty1": "1",
      "tierMinQty2": "10",
      "tierMinQty3": "25",
      "tierMinQty4": "50",
      "tierPrice1": "117.58",
      "tierPrice2": "106.89",
      "tierPrice3": "89.08",
      "tierPrice4": "80.16",
      "width": "0.59",
      "width_Attrib": "Hub Width (LH)"
    },
    "images": [],
    "distributors": [
      {
        "name": "Ruland",
        "sku": "DCD21-8-5-A",
        "url": "https://www.ruland.com/DCD21-8-5-A.html",
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            "price_usd": 117.58
          }
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        "image": "https://www.ruland.com/media/catalog/product/cache/2664fec0a012cdca907d40cfdf0e9678/d/i/disc-coupling-dcd-a.jpg"
      },
      {
        "name": "Applied Industrial",
        "sku": "102022654",
        "url": "https://www.applied.com/c-brands/c-ruland-mfg-co-inc-/dcd21-8-5-a/Clamp-Style-Double-Disc-Coupling/p/102022654",
        "pricing": [],
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    ],
    "amazon": {
      "available": false,
      "products": []
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    "metadata": {
      "generated_date": "2025-12-07",
      "last_updated": "2025-12-07",
      "data_sources": [
        "Applied Industrial",
        "Ruland"
      ],
      "completeness": 0.75,
      "version": "1.0"
    }
  }
}