{"format":"cadcraft-library-item","format_version":1,"uuid":"192e87fc-e84d-4c68-9e9d-56d3098bb7de","version":1,"name":"Hex bolt 1/4-20 UNC × 1 in, ASME B18.2.1","kind":"detail","category":"details/generic","description":"Hex bolt, thread 1/4 in, 20 threads per inch, across flats 11.1 mm, head 4.4 mm, length 25.4 mm, thread 19 mm. Side view across corners; thread drawn by the ISO 6410 convention. Dimensions from ASME B18.2.1. Weight from the nominal shape in steel (7850 kg/m³), threads not taken off.","maker":"","model":"","ifc":{"class":"IfcBuildingElementProxy","predefined":"NOTDEFINED"},"plan":{"layers":[{"name":"PART","color":7},{"name":"PART-THIN","color":8},{"name":"PART-CENTER","color":1},{"name":"PART-HIDDEN","color":4},{"name":"PART-FILL","color":254}],"entities":[{"type":"poly","layer":"PART","color":null,"pts":[[-6.416,0],[6.416,0],[6.416,4.366],[-6.416,4.366]],"closed":true},{"type":"line","layer":"PART","color":null,"x1":-3.208,"y1":0,"x2":-3.208,"y2":4.366},{"type":"line","layer":"PART","color":null,"x1":3.208,"y1":0,"x2":3.208,"y2":4.366},{"type":"poly","layer":"PART","color":null,"pts":[[-3.175,0],[-3.175,-24.13],[-1.905,-25.4],[1.905,-25.4],[3.175,-24.13],[3.175,0]],"closed":false},{"type":"line","layer":"PART-THIN","color":null,"x1":-2.396,"y1":-24.13,"x2":-2.396,"y2":-6.35},{"type":"line","layer":"PART-THIN","color":null,"x1":2.396,"y1":-24.13,"x2":2.396,"y2":-6.35},{"type":"line","layer":"PART","color":null,"x1":-3.175,"y1":-6.35,"x2":3.175,"y2":-6.35},{"type":"line","layer":"PART-CENTER","color":null,"x1":0,"y1":7.366,"x2":0,"y2":-28.4}]},"body":null,"params":{"width":12.8,"depth":29.8,"height":11.1,"weight_kg":0.01},"source_attrs":{"CC-PART-TYPE":"Hex bolt","CC-PART-STD":"ASME B18.2.1","CC-PART-SIZE":"1/4-20 UNC × 1 in","CC-PART-MATERIAL":"Steel","CC-PART-LENGTH":"25.4"},"license":{"id":"CC0-1.0","holder":"CadCraft","attribution":"“Hex bolt 1/4-20 UNC × 1 in, ASME B18.2.1” by CadCraft, dimensions from ASME B18.2.1 (https://www.asme.org/codes-standards/find-codes-standards/b18-2-1-square-hex-heavy-hex-askew-head-bolts-hex-heavy-hex-hex-flange-lobed-head-lag-screws), CC0 1.0 (https://creativecommons.org/publicdomain/zero/1.0/).","url":"https://creativecommons.org/publicdomain/zero/1.0/"},"provenance":{"library":"librarycraft","item":"192e87fc-e84d-4c68-9e9d-56d3098bb7de","version":1,"sha256":"1e6b895803c5ee477ce64b7481d9fe3ec0673d439827746bdd4433ddabe47e1c","source_file":"hex-bolt-1-4-20-unc-x-1-in-asme-b18-2-1.item.json","source_sha256":"5673629217d8f08007c31e84d9274662a1118cc80f77dd0dbe4f4f2fd90436df","published_at":"2026-10-14T21:00:37Z"}}