According to the thread specifications of different countries, there are major imperial & metric bonded seal standard sizes, including the China JB 982-77 standard, the USA/UK Imperial BSP standard, the German & France metric standard, and the specialized CEPOTES standard. These standards are critical for selecting seals that precisely match thread geometries, pressure ratings, and application demands. We list these bonded seal size charts to guide your product integration.
As a leading China manufacturer of sealing solutions, Savvy maintains extensive standard molds and ready stock for metric and imperial Bonded Seals (Bonded Washer / Dowty Washers). Combined with our Material Compatibility Guide, Pressure-Temperature Charts, and Thread Specification Database, you can swiftly identify the optimal bonded seal for your equipment using our comprehensive sizing tables. For specialized requirements, we deliver rapid customized manufacturing solutions.
ID = Inside Diameter OD = Outside Diameter H = Height Dimension Units: Minimeter (mm)
| Size | Thread | ID | Tol. | OD | Tol. | H ± 0.1 | B | Tol. | P |
|---|---|---|---|---|---|---|---|---|---|
| 8 | M8 | 8.4 | ±0.12 | 14 | -0.24 | 2 | 10 | +0.24 | 0.35 |
| 10 | M10 (G1/8″) | 10.4 | ±0.12 | 16 | -0.24 | 2 | 12 | +0.24 | 0.35 |
| 12 | M12 | 12.4 | ±0.12 | 18 | -0.24 | 2 | 14 | +0.24 | 0.35 |
| 14 | M14 (G1/4″) | 14.4 | ±0.12 | 20 | -0.28 | 2 | 16 | +0.24 | 0.35 |
| 16 | M16 | 16.4 | ±0.12 | 22 | -0.28 | 2 | 18 | +0.24 | 0.35 |
| 18 | M18 (G3/8″) | 18.4 | ±0.12 | 25 | -0.28 | 2 | 20 | +0.28 | 0.35 |
| 20 | M20 | 20.5 | ±0.14 | 28 | -0.28 | 2 | 23 | +0.28 | 0.35 |
| 22 | M22 (G1/2″) | 22.5 | ±0.14 | 30 | -0.28 | 2 | 25 | +0.28 | 0.35 |
| 24 | M24 | 24.5 | ±0.14 | 32 | -0.34 | 2 | 27 | +0.28 | 0.35 |
| 27 | M27 (G3/4″) | 27.5 | ±0.14 | 35 | -0.34 | 2 | 30 | +0.28 | 0.35 |
| 30 | M30 | 30.5 | ±0.14 | 38 | -0.34 | 2 | 33 | +0.34 | 0.35 |
| 33 | M33 (G1″) | 33.5 | ±0.17 | 42 | -0.34 | 2 | 36 | +0.34 | 0.35 |
| 36 | M36 | 36.6 | ±0.17 | 46 | -0.34 | 2 | 40 | +0.34 | 0.45 |
| 39 | M39 | 39.6 | ±0.17 | 50 | -0.34 | 2 | 43 | +0.34 | 0.45 |
| 42 | M42 (G1 1/4″) | 42.6 | ±0.17 | 53 | -0.4 | 2 | 46 | +0.34 | 0.45 |
| 45 | M45 | 45.6 | ±0.17 | 56 | -0.4 | 2 | 49 | +0.34 | 0.45 |
| 48 | M48 | 48.7 | ±0.17 | 60 | -0.4 | 2 | 52 | +0.4 | 0.45 |
| 52 | M52 | 52.7 | ±0.20 | 66 | -0.4 | 2 | 56 | +0.4 | 0.45 |
| 60 | M60 (G2″) | 60.7 | ±0.20 | 75 | -0.4 | 2 | 64 | +0.4 | 0.45 |
ID = Inside Diameter OD = Outside Diameter H = Height Dimension Units: Minimeter (mm)
| Size | BSP | Thread | ID ± 0.1 | OD +0.13 | H ± 0.1 | A ± 0.2 | B ± 0.1 | P |
|---|---|---|---|---|---|---|---|---|
| 001 | – | 6BA | 3.05 | 6.35 | 1.22 | – | 4.09 | 0.2/0.38 |
| 002 | – | 4BA | 4.12 | 7.26 | 1.22 | – | 5.26 | 0.2/0.38 |
| 003 | – | 2BA | 5.21 | 8.38 | 1.22 | – | 6.35 | 0.2/0.38 |
| 004 | – | 1/4 | 6.86 | 13.21 | 1.22 | 4.7 | 8 | 0.2/0.38 |
| 005 | – | 1/4 | 6.99 | 13.34 | 1.22 | 4.7 | 9.53 | 0.2/0.38 |
| 006 | – | 5/16 | 8.31 | 13.34 | 1.22 | 6.1 | 9.53 | 0.2/0.38 |
| 007 | – | 5/16 | 8.64 | 14.22 | 1.22 | 6.1 | 10.04 | 0.2/0.38 |
| 020 | 1/8 | 3/8 | 10.37 | 15.88 | 2.03 | 8.56 | 11.84 | 0.25/0.51 |
| 008 | – | 0.4 | 11.26 | 18.36 | 2.03 | 8.56 | 12.45 | 0.25/0.51 |
| 009 | – | 7/16 | 11.69 | 19.05 | 2.03 | 8.8 | 13.08 | 0.25/0.51 |
| 021 | 1/4 | 1/2 | 13.74 | 20.57 | 2.03 | 11.45 | 15.21 | 0.25/0.51 |
| 010 | – | 9/16 | 14.86 | 22.23 | 2.03 | 11.58 | 16.39 | 0.25/0.51 |
| 022 | – | 0.6 | 15.83 | 22.23 | 2.03 | 12.1 | 17.3 | 0.25/0.51 |
| 011 | – | 5/8 | 16.51 | 25.4 | 2.03 | 12.9 | 18.75 | 0.25/0.51 |
| 023 | 3/8 | – | 17.28 | 23.8 | 2.03 | 14.96 | 18.75 | 0.25/0.51 |
| 012 | – | 11/16 | 18.16 | 25.4 | 2.5 | 14.5 | 19.69 | 0.25/0.51 |
| 024 | – | 3/4 | 19.69 | 26.92 | 2.5 | 15.8 | 21.21 | 0.25/0.51 |
| 025 | 1/2 | 13/16 | 21.54 | 28.58 | 2.5 | 18.64 | 23.01 | 0.25/0.51 |
| 026 | 5/8 | 7/8 | 23.49 | 31.75 | 2.5 | 20.6 | 24.97 | 0.25/0.51 |
| 013 | – | 15/16 | 24.26 | 33.27 | 2.5 | 20.2 | 26.04 | 0.25/0.51 |
| 027 | 3/4 | 1 | 27.05 | 34.93 | 2.5 | 24.13 | 28.53 | 0.25/0.51 |
| 028 | – | 1 1/16 | 27.82 | 38.61 | 2.5 | 22.9 | 30.61 | 0.25/0.51 |
| 014 | – | 1 1/8 | 29.33 | 36.58 | 2.5 | 23.9 | 30.86 | 0.25/0.51 |
| 029 | 7/8 | 1 3/16 | 30.81 | 38.1 | 2.5 | 27.89 | 32.29 | 0.25/0.51 |
| 015 | – | 1 1/4 | 32.64 | 41.4 | 3.38 | 27.1 | 35.69 | 0.25/0.51 |
| 030 | 1 | 1 5/16 | 33.89 | 42.8 | 3.38 | 30.3 | 36.88 | 0.25/0.51 |
| 016 | – | 1 3/8 | 35.94 | 44.45 | 3.38 | 29.5 | 38.99 | 0.25/0.51 |
| 017 | – | 1 1/2 | 38.96 | 47.75 | 3.38 | 32.7 | 42.04 | 0.25/0.51 |
| 032 | 1 1/4 | 1 5/8 | 42.93 | 52.38 | 3.38 | 38.96 | 45.93 | 0.25/0.51 |
| 018 | – | 1 3/4 | 45.34 | 57.15 | 3.38 | 37.9 | 48.39 | 0.25/0.51 |
| 033 | 1 1/2 | 1 7/8 | 48.44 | 58.6 | 3.38 | 44.86 | 51.39 | 0.25/0.51 |
| 019 | – | 2 | 51.69 | 63.5 | 3.38 | 43.6 | 54.74 | 0.25/0.51 |
| 034 | 1 3/4 | 2 1/8 | 54.89 | 69.85 | 3.38 | 50.8 | 58.3 | 0.25/0.51 |
| 036 | 2 | – | 60.58 | 73.03 | 3.38 | 56.67 | 63.63 | 0.25/0.51 |
| 037 | – | 2 1/2 | 64.39 | 77.72 | 3.38 | 55.4 | 67.44 | 0.25/0.51 |
| 038 | 2 1/4 | – | 66.68 | 79.5 | 3.38 | 65.8 | 69.98 | 0.25/0.51 |
| 039 | 2 1/2 | – | 76.08 | 90.17 | 3.38 | 72.2 | 79.38 | 0.25/0.51 |
| 079 | 3 | – | 89.09 | 101.47 | 3.38 | 85 | 92.84 | 0.25/0.51 |
ID = Inside Diameter OD = Outside Diameter H = Height Dimension Units: Minimeter (mm)
| Size | Thread | ID ± 0.1 | OD +0.13 | H | Tol. | A ± 0.2 | B ± 0.1 | P |
|---|---|---|---|---|---|---|---|---|
| 201 | 3.5 | 4.1 | 7.2 | 1 | ±0.1 | – | 5.2 | 0.3 |
| 202 | 4 | 4.5 | 7 | 1 | ±0.1 | 3.4 | 5.4 | 0.3 |
| 203 | 5 | 5.7 | 9 | 1 | ±0.1 | 4.5 | 6.8 | 0.3 |
| 204 | 5 | 5.7 | 10 | 1 | ±0.1 | 4.5 | 7.4 | 0.3 |
| 205 | 5.5 | 6.2 | 9.2 | 1 | ±0.1 | 4.7 | 7.2 | 0.3 |
| 206 | 6 | 6.7 | 10 | 1 | ±0.1 | 4.7 | 8 | 0.3 |
| 207 | 6 | 6.7 | 11 | 1 | ±0.1 | 4.7 | 8.2 | 0.3 |
| 208 | 6 | 6.7 | 11 | 2.5 | ±0.1 | – | 8.2 | 0.3 |
| 209 | 6.5 | 7.1 | 12 | 1 | ±0.1 | – | 8.8 | 0.3 |
| 210 | 6.7 | 7.3 | 10.2 | 1 | ±0.1 | 5.77 | 8.6 | 0.3 |
| 211 | 8 | 8.5 | 13.4 | 1 | ±0.1 | – | 9.4 | 0.3 |
| 212 | 8 | 8.7 | 13 | 1 | ±0.1 | 6.4 | 10 | 0.3 |
| 213 | 8 | 8.7 | 14 | 1 | ±0.1 | 6.4 | 10.4 | 0.3 |
| 214 | 8 | 8.7 | 16 | 1 | ±0.1 | – | 10.4 | 0.3 |
| 215 | 8.5 | 9.3 | 13.3 | 1 | ±0.1 | 6.9 | 10.5 | 0.3 |
| 216 | 10 | 10.35 | 16 | 2 | ±0.1 | 8.56 | 12 | 0.4 |
| 217 | 10 | 10.7 | 16 | 1.5 | ±0.1 | 8.05 | 12.4 | 0.4 |
| 218 | 10 | 10.7 | 18 | 1.5 | ±0.1 | 8.05 | 12.4 | 0.4 |
| 219 | 11 | 11.4 | 16.3 | 1.5 | ±0.1 | 9.8 | 12.7 | 0.4 |
| 220 | 11 | 11.8 | 18.5 | 1.5 | ±0.1 | – | 13.7 | 0.4 |
| 221 | 11 | 11.8 | 19.1 | 1.5 | ±0.1 | 9.8 | 13.5 | 0.4 |
| 222 | 12 | 12.7 | 18 | 1.5 | ±0.1 | 9.73 | 14.4 | 0.4 |
| 223 | 12 | 12.7 | 20 | 1.5 | ±0.1 | 9.73 | 14.4 | 0.4 |
| 224 | 13 | 13.7 | 20 | 1.5 | ±0.1 | – | 15.4 | 0.4 |
| 225 | 13 | 13.7 | 22 | 1.5 | ±0.1 | 10.8 | 15.4 | 0.4 |
| 226 | 13.5 | 14 | 18.7 | 1.5 | ±0.1 | 11.3 | 15.7 | 0.4 |
| 227 | 14 | 14.7 | 22 | 1.5 | ±0.1 | 11.38 | 16.4 | 0.4 |
| 228 | 15 | 16 | 22.7 | 1.5 | ±0.1 | – | 17.78 | 0.4 |
| 229 | 16 | 16.7 | 24 | 1.5 | ±0.1 | 13.41 | 18.4 | 0.4 |
| 230 | 17 | 17.4 | 24 | 1.5 | ±0.1 | 13.08 | 19.2 | 0.4 |
| 231 | 17.5 | 18 | 24.7 | 1.5 | ±0.1 | 13.6 | 20.1 | 0.4 |
| 232 | 18 | 18.7 | 26 | 1.5 | ±0.1 | 14.76 | 20.4 | 0.4 |
| 233 | 20 | 20.7 | 28 | 1.5 | ±0.1 | 16.76 | 22.5 | 0.4 |
| 234 | 21 | 21.5 | 28.7 | 2.5 | ±0.15 | 17.8 | 23.3 | 0.4 |
| 235 | 22 | 22.5 | 28 | 1.5 | ±0.1 | – | 24.2 | 0.4 |
| 236 | 22 | 22.7 | 30 | 2 | ±0.1 | 18.74 | 24.4 | 0.4 |
| 237 | 22 | 22.7 | 30 | 3 | ±0.1 | – | 24.4 | 0.4 |
| 238 | 24 | 24.7 | 32 | 2 | ±0.1 | 20.11 | 26.4 | 0.4 |
| 239 | 26 | 26.7 | 35 | 2 | ±0.1 | 22.3 | 28.4 | 0.4 |
| 240 | 27 | 27.2 | 36 | 2 | ±0.1 | 22.3 | 29 | 0.4 |
| 241 | 28 | 28.7 | 37 | 2 | ±0.1 | – | 30.4 | 0.4 |
| 242 | 30 | 31 | 39 | 2 | ±0.1 | 25.7 | 33 | 0.4 |
| 243 | 33 | 33.7 | 42 | 2 | ±0.1 | 28.7 | 35.8 | 0.4 |
| 244 | 33 | 34.3 | 43 | 2 | ±0.1 | 28.7 | 36.4 | 0.4 |
| 245 | 36 | 36.7 | 46 | 2 | ±0.1 | 31.1 | 38.8 | 0.4 |
| 246 | 39 | 40 | 51 | 2.5 | ±0.1 | 34.1 | 41.9 | 0.4 |
| 247 | 42 | 42.7 | 53 | 3 | ±0.15 | 36.5 | 44.4 | 0.4 |
| 248 | 48 | 48.7 | 59 | 3 | ±0.15 | 41.9 | 50.8 | 0.4 |
| 249 | 51 | 52 | 60 | 3 | ±0.15 | – | 54.1 | 0.4 |
| 250 | 52 | 53.3 | 64.5 | 3 | ±0.15 | 46 | 56.4 | 0.4 |
| 251 | 60 | 60.7 | 73 | 3 | ±0.15 | – | 63 | 0.4 |
| 252 | 68 | 68.6 | 79.5 | 3.5 | ±0.15 | – | 72.1 | 0.4 |
| 253 | 75 | 76.08 | 90.3 | 3.38 | ±0.15 | – | 79.1 | 0.4 |
| 254 | 88 | 89.09 | 101.48 | 3.25 | ±0.15 | 84.5 | 92.1 | 0.4 |
| 255 | 125 | 127 | 143.67 | 5 | ±0.15 | – | 132.7 | 0.4 |
French Metric Bonded Seal Size Chart (ISO R261 BS 3643)
ID = Inside Diameter OD = Outside Diameter H = Height Dimension Units: Minimeter (mm)
| Size | Thread | ID ± 0.1 | OD +0.13 | H | Tol. | A ± 0.2 | B ± 0.1 | P |
|---|---|---|---|---|---|---|---|---|
| 301 | 3 | 3.6 | 7.5 | 1 | ±0.10 | – | 5 | 0.3 |
| 302 | 4 | 4.6 | 9 | 1 | ±0.10 | 3.4 | 6 | 0.3 |
| 303 | 5 | 5.6 | 10 | 1 | ±0.10 | 4.5 | 7 | 0.3 |
| 304 | 6 | 6.6 | 11 | 1 | ±0.10 | 4.7 | 8 | 0.3 |
| 305 | 6 | 6.85 | 13.27 | 1.3 | ±0.10 | 8 | 0.3 | |
| 306 | 6 | 7 | 11.4 | 1 | ±0.10 | 4.7 | 8.4 | 0.3 |
| 307 | 8 | 8.6 | 13 | 1 | ±0.10 | 6.4 | 10 | 0.3 |
| 310 | 10 | 10.7 | 17 | 1.5 | ±0.10 | 8.56 | 12.1 | 0.3 |
| 312 | 11 | 11.8 | 18.1 | 1.5 | ±0.10 | 9.8 | 13.2 | 0.3 |
| 313 | 12 | 12.7 | 19 | 1.5 | ±0.10 | 9.73 | 14.1 | 0.3 |
| 315 | 13 | 13.8 | 20.1 | 1.5 | ±0.10 | 10.8 | 15.2 | 0.4 |
| 316 | 14 | 14.7 | 21 | 1.5 | ±0.10 | 11.38 | 16.1 | 0.3 |
| 317 | 16 | 16.7 | 23 | 1.5 | ±0.10 | 11.41 | 18.1 | 0.3 |
| 318 | 16.5 | 17.4 | 23.7 | 1.5 | ±0.10 | 13.08 | 18.8 | 0.4 |
| 319 | 16.5 | 17.2 | 23.9 | 2.1 | ±0.10 | – | 18.7 | 0.4 |
| 320 | 18 | 18.7 | 27 | 2 | ±0.10 | 14.76 | 20.4 | 0.3 |
| 321 | 20 | 20.7 | 29 | 2 | ±0.10 | 16.76 | 22.4 | 0.3 |
| 322 | 20 | 21.5 | 28.6 | 2.5 | ±0.15 | – | 23 | 0.4 |
| 323 | 22 | 21.7 | 30 | 2 | ±0.10 | 17.8 | 23.4 | 0.4 |
| 324 | 22 | 22.7 | 31 | 2 | ±0.10 | 18.74 | 24.4 | 0.4 |
| 325 | 23 | 23.7 | 32 | 2 | ±0.10 | 19.3 | 25.4 | 0.4 |
| 326 | 24 | 24.7 | 33 | 2 | ±0.10 | 20.11 | 26.4 | 0.4 |
| 327 | 26 | 27 | 35.3 | 2 | ±0.10 | 22.3 | 28.7 | 0.4 |
| 328 | 27 | 27.7 | 36 | 2 | ±0.10 | 23.3 | 29.4 | 0.4 |
| 329 | 28 | 28.6 | 36 | 2 | ±0.10 | 24.8 | 30.3 | 0.4 |
| 330 | 28.5 | 29.2 | 37.5 | 2 | ±0.10 | – | 30.9 | 0.4 |
| 331 | 30 | 30.7 | 39 | 2 | ±0.10 | 25.7 | 32.4 | 0.4 |
| 332 | 33 | 33.7 | 42 | 2 | ±0.10 | 28.7 | 35.4 | 0.4 |
| 333 | 36 | 37 | 48 | 2.5 | ±0.15 | 31.1 | 39.6 | 0.4 |
| 334 | 39 | 40 | 51 | 2.5 | ±0.15 | 34.1 | 42.6 | 0.4 |
| 335 | 42 | 43 | 54 | 2.5 | ±0.15 | 36.5 | 45.6 | 0.4 |
| 336 | 45 | 46 | 57 | 2.5 | ±0.15 | 39.5 | 48.6 | 0.4 |
| 337 | 48 | 49 | 60 | 2.5 | ±0.15 | 41.9 | 51.6 | 0.4 |
ID = Inside Diameter OD = Outside Diameter H = Height Dimension Units: Minimeter (mm)
| Size | Thread | ID | Tol. | OD | Tol. | H ± 0.15 | B | Tol. | P +0.25 |
|---|---|---|---|---|---|---|---|---|---|
| 519 | 1/16 | 8.30 | +0.2 | 12.70 | -0.2 | 1.25 | 9.90 | +0.2 | 0.25 |
| 510 | 1/8 | 10.40 | +0.2 | 14.70 | -0.2 | 1.25 | 12.00 | +0.2 | 0.25 |
| 511 | 1/4 | 13.85 | +0.2 | 18.70 | -0.2 | 1.25 | 15.75 | +0.2 | 0.25 |
| 512 | 3/8 | 17.35 | +0.2 | 22.70 | -0.2 | 1.25 | 19.25 | +0.2 | 0.25 |
| 513 | 1/2 | 21.65 | +0.2 | 26.70 | -0.2 | 1.25 | 23.55 | +0.2 | 0.25 |
| 514 | 3/4 | 27.30 | +0.2 | 32.50 | -0.2 | 1.25 | 29.20 | +0.2 | 0.25 |
| 515 | 1.0 | 34.20 | +0.2 | 39.50 | -0.2 | 2 | 36.10 | +0.2 | 0.25 |
| 516 | 1 1/4 | 42.80 | +0.2 | 49.50 | -0.2 | 2 | 44.70 | +0.2 | 0.25 |
| 517 | 1 1/2 | 48.70 | +0.2 | 55.50 | -0.2 | 2 | 50.60 | +0.2 | 0.25 |
| 518 | 2.0 | 60.50 | +0.2 | 68.50 | -0.2 | 2 | 62.40 | +0.2 | 0.25 |
Download the printable PDF Dowty Bonded Seal Size Chart by clicking the following files. If you require our Excel version, please email [email protected].
Non Self-Centering
Self-Centering