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Medium Pressure Die Springs |
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| Hole Diam. | Rod Diam | Free Length Inches | Free Length mm | PAC CATALOG NUMBER |
50% Deflection Pressure Pounds |
50% Deflection Deflection Length | 40% Deflection Pressure Pounds | 40% Deflection Deflection Length | 25% Deflection Pressure Pounds | 25% Deflection Deflection Length | Travel to Solid Pressure Pounds | Travel to Solid Deflection Length | Lbs. @/.10" Deflection |
| 3/8 | 3/16 | 1.00 | 25.4 | M 37-100 | 37 | 0.500 | 29 | 0.400 | 18 | 0.250 | 42 | 0.572 | 7.3 |
| 3/8 | 3/16 | 12.00 | 304.8 | M 37-1200 | 42 | 6.00 | 34 | 4.800 | 21 | 3.000 | 55 | 7.800 | 0.7 |
| 3/8 | 3/16 | 1.25 | 31.8 | M 37-125 | 41 | 0.625 | 33 | 0.500 | 20 | 0.313 | 47 | 0.725 | 6.5 |
| 3/8 | 3/16 | 1.50 | 38.1 | M 37-150 | 38 | 0.750 | 30 | 0.600 | 19 | 0.375 | 45 | 0.896 | 5.0 |
| 3/8 | 3/16 | 1.75 | 44.5 | M 37-175 | 37 | 0.875 | 29 | 0.700 | 18 | 0.438 | 46 | 1.088 | 4.2 |
| 3/8 | 3/16 | 2.00 | 50.8 | M 37-200 | 38 | 1.000 | 30 | 0.800 | 19 | 0.500 | 44 | 1.163 | 3.8 |
| 3/8 | 3/16 | 1.50 | 38.1 | M 37-250 | 38 | 1.250 | 30 | 1.000 | 19 | 0.625 | 47 | 1.552 | 3.0 |
| 3/8 | 3/16 | 3.00 | 76.2 | M 37-300 | 30 | 1.500 | 24 | 1.200 | 15 | 0.750 | 36 | 1.821 | 2.0 |
| 1/2 | 9/32 | 1.00 | 25.4 | M 50-100 | 55 | 0.500 | 44 | 0.400 | 28 | 0.250 | 59 | 0.536 | 11.0 |
| 1/2 | 9/32 | 12.00 | 304.8 | M 50-1200 | 48 | 6.000 | 38 | 4.800 | 24 | 3.000 | 50 | 6.215 | 0.8 |
| 1/2 | 9/32 | 1.25 | 31.8 | M 50-125 | 55 | 0.625 | 44 | 0.500 | 28 | 0.313 | 63 | 0.719 | 8.8 |
| 1/2 | 9/32 | 1.50 | 38.1 | M 50-150 | 59 | 0.750 | 47 | 0.600 | 29 | 0.375 | 65 | 0.831 | 7.8 |
| 1/2 | 9/32 | 1.75 | 44.5 | M 50-175 | 51 | 0.875 | 41 | 0.700 | 25 | 0.438 | 56 | 0.972 | 5.8 |
| 1/2 | 9/32 | 2.00 | 50.8 | M 50-200 | 52 | 1.000 | 42 | 0.800 | 26 | 0.500 | 57 | 1.091 | 5.2 |
| 1/2 | 9/32 | 2.50 | 63.5 | M 50-250 | 63 | 1.250 | 50 | 1.000 | 31 | 0.625 | 73 | 1.464 | 5.0 |
| 1/2 | 9/32 | 3.00 | 76.2 | M 50-300 | 53 | 1.500 | 42 | 1.200 | 26 | 0.750 | 65 | 1.850 | 3.5 |
| 1/2 | 9/32 | 3.50 | 88.9 | M 50-350 | 56 | 1.750 | 45 | 1.400 | 28 | 0.875 | 70 | 2.190 | 3.2 |
| 1/2 | 9/32 | 4.50 | 114.3 | M 50-450 | 56 | 2.250 | 45 | 1.800 | 28 | 1.125 | 68 | 2.736 | 2.5 |
| 1/2 | 9/32 | 5.50 | 139.7 | M 50-550 | 58 | 2.750 | 46 | 2.200 | 29 | 1.375 | 72 | 3.436 | 2.1 |
| 1/2 | 9/32 | 6.50 | 165.1 | M 50-650 | 49 | 3.250 | 39 | 2.600 | 24 | 1.625 | 57 | 3.787 | 1.5 |
| 1/2 | 9/32 | 7.50 | 190.5 | M 50-750 | 45 | 3.750 | 36 | 3.000 | 23 | 1.875 | 49 | 4.075 | 1.2 |
| 5/8 | 11/32 | 1.00 | 25.4 | M 62-100 | 95 | 0.500 | 76 | 0.400 | 48 | 0.250 | 100 | 0.528 | 19.0 |
| 5/8 | 11/32 | 12.00 | 304.8 | M 62-1200 | 96 | 6.000 | 77 | 4.800 | 48 | 3.000 | 122 | 7.609 | 1.6 |
| 5/8 | 11/32 | 1.25 | 31.8 | M 62-125 | 89 | 0.625 | 72 | 0.500 | 45 | 0.313 | 95 | 0.665 | 14.3 |
| 5/8 | 11/32 | 1.50 | 38.1 | M 62-150 | 98 | 0.750 | 78 | 0.600 | 49 | 0.375 | 111 | 0.850 | 13.0 |
| 5/8 | 11/32 | 1.75 | 44.5 | M 62-175 | 86 | 0.875 | 69 | 0.700 | 43 | 0.438 | 96 | 0.982 | 9.8 |
| 5/8 | 11/32 | 2.00 | 50.8 | M 62-200 | 102 | 1.000 | 82 | 0.800 | 51 | 0.500 | 115 | 1.126 | 10.2 |
| 5/8 | 11/32 | 2.50 | 63.5 | M 62-250 | 91 | 1.250 | 73 | 1.000 | 46 | 0.625 | 108 | 1.476 | 7.3 |
| 5/8 | 11/32 | 3.00 | 76.2 | M 62-300 | 99 | 1.500 | 79 | 1.200 | 50 | 0.750 | 122 | 1.842 | 6.6 |
| 5/8 | 11/32 | 3.50 | 88.9 | M 62-350 | 88 | 1.750 | 70 | 1.400 | 44 | 0.875 | 111 | 2.229 | 5.0 |
| 1 | 1/2 | 1.00 | 25.4 | M100-100 | 290 | 0.500 | 232 | 0.400 | 145 | 0.250 | 295 | 0.509 | 58.0 |
| 1 | 1/2 | 12.00 | 304.8 | M100-1200 | 264 | 6.000 | 211 | 4.800 | 132 | 3.000 | 317 | 7.210 | 4.4 |
| 1 | 1/2 | 1.25 | 31.8 | M100-125 | 330 | 0.625 | 264 | 0.500 | 165 | 0.313 | 350 | 0.663 | 52.8 |
| 1 | 1/2 | 1.50 | 38.1 | M100-150 | 301 | 0.750 | 241 | 0.600 | 150 | 0.375 | 318 | 0.792 | 40.1 |
| 1 | 1/2 | 1.75 | 44.5 | M100-175 | 294 | 0.875 | 235 | 0.700 | 147 | 0.438 | 317 | 0.944 | 33.6 |
| 1 | 1/2 | 2.00 | 50.8 | M100-200 | 289 | 1.000 | 231 | 0.800 | 145 | 0.500 | 317 | 1.097 | 28.9 |
| 1 | 1/2 | 2.50 | 63.5 | M100-250 | 283 | 1.250 | 226 | 1.000 | 141 | 0.625 | 317 | 1.403 | 22.6 |
| 1 | 1/2 | 3.00 | 76.2 | M100-300 | 279 | 1.500 | 223 | 1.200 | 140 | 0.750 | 318 | 1.709 | 18.6 |
| 1 | 1/2 | 3.50 | 88.9 | M100-350 | 277 | 1.750 | 221 | 1.400 | 138 | 0.875 | 318 | 2.014 | 15.8 |
| 1 | 1/2 | 4.00 | 101.6 | M100-400 | 274 | 2.000 | 219 | 1.600 | 137 | 1.00 | 318 | 2.320 | 13.7 |
| 1 | 1/2 | 4.50 | 114.3 | M100-450 | 272 | 2.250 | 218 | 1.800 | 136 | 1.125 | 318 | 2.625 | 12.1 |
| 1 | 1/2 | 5.00 | 127.0 | M100-500 | 270 | 2.500 | 216 | 2.000 | 135 | 1.250 | 317 | 2.931 | 10.8 |
| 1 | 1/2 | 5.50 | 139.7 | M100-550 | 270 | 2.750 | 216 | 2.200 | 135 | 1.375 | 317 | 3.236 | 9.8 |
| 1 | 1/2 | 6.00 | 152.4 | M100-600 | 270 | 3.000 | 216 | 2.400 | 135 | 1.500 | 319 | 3.542 | 9.8 |
| 1 | 1/2 | 7.00 | 177.8 | M100-700 | 266 | 3.500 | 213 | 2.800 | 133 | 1.750 | 316 | 4.154 | 7.6 |
| 1 | 1/2 | 8.00 | 203.2 | M100-800 | 268 | 4.000 | 214 | 3.200 | 134 | 2.000 | 319 | 4.764 | 6.7 |
| 1 1/4 | 5/8 | 10.00 | 254.0 | M125-1000 | 360 | 5.000 | 288 | 4.000 | 180 | 2.500 | 459 | 6.375 | 7.2 |
| 1 1/4 | 5/8 | 12.00 | 304.8 | M125-1200 | 360 | 6.000 | 288 | 4.800 | 180 | 3.000 | 461 | 7.681 | 6.0 |
| 1 1/4 | 5/8 | 1.50 | 38.1 | M125-150 | 389 | 0.750 | 311 | 0.600 | 194 | 0.375 | 410 | 0.792 | 51.8 |
| 1 1/4 | 5/8 | 1.75 | 44.5 | M125-175 | 350 | 0.875 | 280 | 0.700 | 175 | 0.438 | 374 | 0.935 | 40.0 |
| 1 1/4 | 5/8 | 2.00 | 50.8 | M125-200 | 357 | 1.000 | 286 | 0.800 | 179 | 0.500 | 413 | 1.156 | 35.7 |
| 1 1/4 | 5/8 | 2.50 | 63.5 | M125-250 | 391 | 1.250 | 313 | 1.000 | 196 | 0.625 | 464 | 1.451 | 31.3 |
| 1 1/4 | 5/8 | 3.00 | 76.2 | M125-300 | 383 | 1.500 | 306 | 1.200 | 191 | 0.750 | 460 | 1.804 | 25.5 |
| 1 1/4 | 5/8 | 3.50 | 88.9 | M125-350 | 378 | 1.750 | 302 | 1.400 | 189 | 0.875 | 460 | 2.131 | 21.6 |
| 1 1/4 | 5/8 | 4.00 | 101.6 | M125-400 | 374 | 2.000 | 299 | 1.600 | 187 | 1.000 | 459 | 2.457 | 18.7 |
| 1 1/4 | 5/8 | 4.50 | 114.3 | M125-450 | 371 | 2.250 | 297 | 1.800 | 186 | 1.125 | 459 | 2.784 | 16.5 |
| 1 1/4 | 5/8 | 5.00 | 127.0 | M125-500 | 370 | 2.500 | 296 | 2.000 | 185 | 1.250 | 461 | 3.112 | 14.8 |
| 1 1/4 | 5/8 | 5.50 | 139.7 | M125-550 | 369 | 2.750 | 295 | 2.200 | 184 | 1.375 | 460 | 3.435 | 13.4 |
| 1 1/4 | 5/8 | 6.00 | 152.4 | M125-600 | 366 | 3.000 | 393 | 2.400 | 183 | 1.500 | 458 | 3.758 | 12.2 |
| 1 1/4 | 5/8 | 7.00 | 177.8 | M125-700 | 364 | 3.500 | 291 | 2.800 | 182 | 1.750 | 459 | 4.418 | 10.4 |
| 1 1/4 | 5/8 | 8.00 | 203.2 | M125-800 | 364 | 4.000 | 291 | 3.200 | 182 | 2.000 | 461 | 5.068 | 9.1 |
| 1 1/2 | 3/4 | 10.00 | 254.0 | M150-1000 | 500 | 5.000 | 400 | 4.000 | 250 | 2.500 | 609 | 6.094 | 10.0 |
| 1 1/2 | 3/4 | 12.00 | 304.8 | M150-1200 | 492 | 6.000 | 394 | 4.800 | 246 | 3.000 | 588 | 7.172 | 8.2 |
| 1 1/2 | 3/4 | 2.00 | 50.8 | M150-200 | 450 | 1.000 | 360 | 0.800 | 225 | 0.500 | 504 | 1.120 | 45.0 |
| 1 1/2 | 3/4 | 2.50 | 63.5 | M150-250 | 525 | 1.250 | 420 | 1.000 | 263 | 0.625 | 572 | 1.361 | 42.0 |
| 1 1/2 | 3/4 | 3.00 | 76.2 | M150-300 | 519 | 1.500 | 415 | 1.500 | 260 | 0.750 | 603 | 1.744 | 34.6 |
| 1 1/2 | 3/4 | 3.50 | 88.9 | M150-350 | 520 | 1.750 | 416 | 1.400 | 260 | 0.875 | 584 | 1.966 | 29.7 |
| 1 1/2 | 3/4 | 4.00 | 101.6 | M150-400 | 532 | 2.000 | 426 | 1.600 | 266 | 1.000 | 624 | 2.344 | 26.6 |
| 1 1/2 | 3/4 | 4.50 | 114.3 | M150-450 | 513 | 2.250 | 410 | 1.800 | 257 | 1.125 | 592 | 2.595 | 22.8 |
| 1 1/2 | 3/4 | 5.00 | 127.0 | M150-500 | 500 | 2.500 | 400 | 2.000 | 250 | 1.250 | 592 | 2.960 | 20.0 |
| 1 1/2 | 3/4 | 5.50 | 139.7 | M150-550 | 506 | 2.750 | 405 | 2.200 | 253 | 1.375 | 589 | 3.203 | 18.4 |
| 1 1/2 | 3/4 | 6.00 | 152.4 | M150-600 | 480 | 3.000 | 384 | 2.400 | 240 | 1.500 | 569 | 3.554 | 16.0 |
| 1 1/2 | 3/4 | 7.00 | 177.8 | M150-700 | 497 | 3.500 | 398 | 2.800 | 249 | 1.750 | 591 | 4.162 | 14.2 |
| 1 1/2 | 3/4 | 8.00 | 203.2 | M150-800 | 516 | 4.000 | 413 | 3.200 | 258 | 2.000 | 626 | 4.856 | 12.9 |
| 2 | 1 | 10.00 | 254.0 | M200-1000 | 1052 | 5.000 | 840 | 4.000 | 525 | 2.500 | 1231 | 5.860 | 21.0 |
| 2 | 1 | 12.00 | 304.8 | M200-1200 | 990 | 6.000 | 792 | 4.800 | 495 | 3.000 | 1118 | 6.775 | 16.5 |
| 2 | 1 | 2.50 | 63.5 | M200-250 | 1216 | 1.250 | 973 | 1.000 | 608 | 0.625 | 1245 | 1.280 | 97.3 |
| 2 | 1 | 3.00 | 76.2 | M200-300 | 1140 | 1.500 | 912 | 1.200 | 570 | 0.750 | 1178 | 1.550 | 76.0 |
| 2 | 1 | 3.50 | 88.9 | M200-350 | 1138 | 1.750 | 910 | 1.400 | 569 | 0.875 | 1192 | 1.834 | 65.0 |
| 2 | 1 | 4.00 | 101.6 | M200-400 | 1128 | 2.000 | 902 | 1.600 | 564 | 1.000 | 1199 | 2.125 | 56.4 |
| 2 | 1 | 4.50 | 114.3 | M200-450 | 1105 | 2.250 | 884 | 1.800 | 552 | 1.125 | 1157 | 2.356 | 49.1 |
| 2 | 1 | 5.00 | 127.0 | M200-500 | 1095 | 2.500 | 876 | 2.000 | 548 | 1.250 | 1202 | 2.745 | 43.8 |
| 2 | 1 | 5.50 | 139.7 | M200-550 | 1108 | 2.750 | 887 | 2.200 | 554 | 1.375 | 1198 | 2.972 | 40.3 |
| 2 | 1 | 6.00 | 152.4 | M200-600 | 1116 | 3.000 | 893 | 2.400 | 558 | 1.500 | 1221 | 3.282 | 37.2 |
| 2 | 1 | 7.00 | 177.8 | M200-700 | 1071 | 3.500 | 857 | 2.800 | 536 | 1.750 | 1165 | 3.806 | 30.6 |
| 2 | 1 | 8.00 | 203.2 | M200-800 | 1072 | 4.000 | 858 | 3.200 | 536 | 2.000 | 1190 | 4.439 | 26.8 |
| 5/8 | 11/32 | 4.00 | 101.6 | M62-400 | 92 | 2.000 | 74 | 1.600 | 46 | 1.000 | 119 | 2.577 | 4.6 |