STEVEMIT
steve/inch-flat-head-screw
Flat head (countersunk) socket cap screw, inch, ASME B18.3, #0 to 1/2 in, UNC/UNF, any length, with catalogue sizes as presets.
steve/countersunk-screw
Countersunk socket screw, ISO 10642 / DIN 7991, M3 to M12, any length.
Isometric
Section analysis
Plane normal
Offset
| 1 | """ISO 10642 (DIN 7991) countersunk socket screw. Envelope: 90 degree head and plain shank in one revolved |
| 2 | profile, hex socket. The head's top face is on the XY plane at the origin; `length` is the overall length.""" |
| 3 | from steve import Model |
| 4 | |
| 5 | size = "M4" # Thread size |
| 6 | length = 12 # mm Overall length (head included) |
| 7 | |
| 8 | # size: (head diameter dk, head height k, hex key s) |
| 9 | HEADS = { |
| 10 | 'M3': (6.72, 1.86, 2.0), |
| 11 | 'M4': (8.96, 2.48, 2.5), |
| 12 | 'M5': (11.2, 3.1, 3.0), |
| 13 | 'M6': (13.44, 3.72, 4.0), |
| 14 | 'M8': (17.92, 4.96, 5.0), |
| 15 | 'M10': (22.4, 6.2, 6.0), |
| 16 | 'M12': (26.88, 7.44, 8.0), |
| 17 | } |
| 18 | NOMINAL = { |
| 19 | 'M3': 3.0, |
| 20 | 'M4': 4.0, |
| 21 | 'M5': 5.0, |
| 22 | 'M6': 6.0, |
| 23 | 'M8': 8.0, |
| 24 | 'M10': 10.0, |
| 25 | 'M12': 12.0, |
| 26 | } |
| 27 | dk, k, s = HEADS[size] |
| 28 | d = NOMINAL[size] |
| 29 | cone = (dk - d) / 2 # 90 degree countersink: as deep as it is wide |
| 30 | total = max(length, cone + 0.5) |
| 31 | |
| 32 | model = Model() |
| 33 | with model.sketch("profile", on="XZ", name="Profile") as sk: |
| 34 | sk.polyline("outline", [(0, 0), (dk / 2, 0), (d / 2, -cone), (d / 2, -total), (0, -total)]) |
| 35 | model.revolve("body", "profile", axis="Z") |
| 36 | with model.sketch("socket_sketch", on="XY", name="Hex socket") as sk: |
| 37 | sk.polygon("hex", (0, 0), s / 2, 6, inscribed=False) |
| 38 | model.extrude("socket", "socket_sketch", distance=-0.8 * k, op="cut") |
| 39 | result = model.result() |
| 40 |
| 1 | name = "steve/countersunk-screw" |
| 2 | version = "1.0.0" |
| 3 | runtime = "steve" |
| 4 | license = "MIT" |
| 5 | summary = "Countersunk socket screw, ISO 10642 / DIN 7991, M3 to M12, any length." |
| 6 | description = "ISO 10642 (DIN 7991) countersunk socket screw. Envelope: 90 degree head and plain shank in one revolved\nprofile, hex socket. The head's top face is on the XY plane at the origin; `length` is the overall length.\n\nDimensions from STEVE's standard-part tables (nominal values of the standard). Envelope geometry: no modelled thread." |
| 7 | tags = ["fastener", "screw", "iso-10642", "din-7991", "metric"] |
| 8 | |
| 9 | [parameters.size] |
| 10 | type = "choice" |
| 11 | default = "M4" |
| 12 | choices = ["M3", "M4", "M5", "M6", "M8", "M10", "M12"] |
| 13 | label = "Thread size" |
| 14 | |
| 15 | [parameters.length] |
| 16 | type = "number" |
| 17 | default = 12 |
| 18 | min = 3 |
| 19 | max = 120 |
| 20 | step = 1 |
| 21 | unit = "mm" |
| 22 | label = "Length" |
| 23 |
ISO 10642 (DIN 7991) countersunk socket screw. Envelope: 90 degree head and plain shank in one revolved profile, hex socket. The head's top face is on the XY plane at the origin; `length` is the overall length. Dimensions from STEVE's standard-part tables (nominal values of the standard). Envelope geometry: no modelled thread.
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Materials and finishes: each part is made of its standard's engineering material, with its usual finish.
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