Peterson Spring

248.799.5400

Spring manufacturer | Springs, snap-rings, wire forms, clips, clamps, stampings

866.799.9417
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Heavy Duty – ISO Inch Series

Heavy-Duty-inch-spring(Solid Red)

Efficient Operating Range is 15% to 30% deflection of free length. Maximum deflection is 30%; Long Life deflection is 20%; Optimum Life deflection is 15%. Deflection beyond this Efficient Operating Range could result in premature spring failure. Travel to Solid is a reference dimension only and should never be approached during use.

30% Deflection 20% Deflection 15% Deflection
Part# Free
Length (In)
Load (lbs) Deflection Length Load (lbs) Deflection Length Load (lbs) Deflection Length Deflection Length
Travel To Solid
Load @
.1″ Deflection (lbs)
Hole Dia.
Rod Dia.
DHD37-100 1 51 0.300 34 0.200 26 0.150 0.379 17.1 3/8 3/16
DHD37-125 1.25 44 0.375 30 0.250 22 0.188 0.456 11.8 3/8 3/16
DHD37-150 1.5 45 0.450 30 0.300 23 0.225 0.557 10 3/8 3/16
DHD37-175 1.75 46 0.525 31 0.350 23 0.263 0.697 8.8 3/8 3/16
DHD37-200 2 49 0.600 32 0.400 24 0.300 0.804 8.1 3/8 3/16
DHD37-250 2.5 50 0.750 33 0.500 25 0.375 1.100 6.6 3/8 3/16
DHD37-300 3 45 0.900 30 0.600 23 0.450 1.210 5 3/8 3/16
DHD37-1200 12 43 3.600 29 2.400 22 1.800 4.180 1.2 3/8 3/16
DHD50-100 1 75 0.300 50 0.200 38 0.150 0.468 25 1/2 9/32
DHD50-125 1.25 66 0.375 44 0.250 33 0.188 0.573 17.5 1/2 9/32
DHD50-150 1.5 76 0.450 50 0.300 38 0.225 0.693 16.8 1/2 9/32
DHD50-175 1.75 74 0.525 49 0.350 37 0.263 0.845 14 1/2 9/32
DHD50-200 2 66 0.600 44 0.400 33 0.300 1.000 11 1/2 9/32
DHD50-250 2.5 74 0.750 49 0.500 37 0.375 1.300 9.8 1/2 9/32
DHD50-300 3 68 0.900 45 0.600 34 0.450 1.430 7.5 1/2 9/32
DHD50-350 3.5 69 1.050 46 0.700 35 0.525 1.766 6.6 1/2 9/32
DHD50-1200 12 68 3.600 46 2.400 34 1.800 6.122 1.9 1/2 9/32
DHD62-100 1 143 0.300 95 0.200 71 0.150 0.363 47.5 3/8 11/32
DHD62-125 1.25 131 0.375 88 0.250 66 0.188 0.476 35 3/8 11/32
DHD62-150 1.5 135 0.450 90 0.300 68 0.225 0.588 30 3/8 11/32
DHD62-175 1.75 131 0.525 88 0.350 66 0.263 0.700 25 3/8 11/32
DHD62-200 2 130 0.600 86 0.400 65 0.300 0.813 21.6 3/8 11/32
DHD62-250 2.5 126 0.750 84 0.500 63 0.375 1.120 16.8 3/8 11/32
DHD62-300 3 126 0.900 84 0.600 63 0.450 1.350 14 3/8 11/32
DHD62-350 3.5 145 1.050 97 0.700 72 0.525 1.600 13.8 3/8 11/32
DHD62-400 4 127 1.200 85 0.800 64 0.600 1.840 10.6 3/8 11/32
DHD62-1200 12 119 3.600 79 2.400 59 1.800 5.311 3.3 3/8 11/32
DHD75-100 1 394 0.300 263 0.200 197 0.150 0.305 131.4 3/4 3/8
DHD75-125 1.25 360 0.375 240 0.250 180 0.188 0.392 96 3/4 3/8
DHD75-150 1.5 329 0.450 219 0.300 164 0.225 0.491 73 3/4 3/8
DHD75-175 1.75 331 0.525 221 0.350 166 0.263 0.565 63 3/4 3/8
DHD75-200 2 318 0.600 212 0.400 159 0.300 0.655 53 3/4 3/8
DHD75-250 2.5 311 0.750 207 0.500 155 0.375 0.849 41.4 3/4 3/8
DHD75-300 3 354 0.900 236 0.600 177 0.450 1.046 39.3 3/4 3/8
DHD75-350 3.5 309 1.050 206 0.700 154 0.525 1.238 29.4 3/4 3/8
DHD75-400 4 360 1.200 240 0.800 180 0.600 1.520 30 3/4 3/8
DHD75-450 4.5 313 1.350 209 0.900 157 0.675 1.745 23.2 3/4 3/8
DHD75-500 5 375 1.500 250 1.000 188 0.750 1.911 25 3/4 3/8
DHD75-550 5.5 368 1.650 245 1.100 184 0.825 2.144 22.3 3/4 3/8
DHD75-600 6 362 1.800 241 1.200 181 0.900 2.326 20.1 3/4 3/8
DHD75-1200 12 328 3.600 218 2.400 164 1.800 4.380 9.1 3/4 3/8
DHD100-100 1 398 0.200 299 0.150 0.285 199 1 1/2
DHD100-125 1.25 600 0.375 400 0.250 301 0.188 0.383 160 1 1/2
DHD100-150 1.5 690 0.450 460 0.300 345 0.225 0.497 153.4 1 1/2
DHD100-175 1.75 579 0.525 386 0.350 290 0.263 0.632 110.3 1 1/2
DHD100-200 2 570 0.600 380 0.400 285 0.300 0.709 95 1 1/2
DHD100-250 2.5 577 0.750 385 0.500 288 0.375 0.866 76.9 1 1/2
DHD100-300 3 567 0.900 378 0.600 284 0.450 1.022 63 1 1/2
DHD100-350 3.5 446 1.050 298 0.700 223 0.525 1.172 42.5 1 1/2
DHD100-400 4 556 1.200 370 0.800 278 0.600 1.438 46.3 1 1/2
DHD100-450 4.5 525 1.350 350 0.900 263 0.675 1.645 38.9 1 1/2
DHD100-500 5 531 1.500 354 1.000 266 0.750 1.836 35.4 1 1/2
DHD100-550 5.5 523 1.650 349 1.100 262 0.825 2.080 31.7 1 1/2
DHD100-600 6 515 1.800 343 1.200 257 0.900 2.282 28.6 1 1/2
DHD100-700 7 546 2.100 364 1.400 273 1.050 2.532 26 1 1/2
DHD100-800 8 528 2.400 352 1.600 264 1.200 2.984 22 1 1/2
DHD100-1200 12 540 3.600 360 2.400 270 1.800 4.580 15 1 1/2
DHD125-150 1.5 1013 0.450 675 0.300 506 0.225 0.472 225 1-1/4 5/8
DHD125-175 1.75 1029 0.525 686 0.350 515 0.263 0.561 196 1-1/4 5/8
DHD125-200 2 960 0.600 640 0.400 480 0.300 0.628 160 1-1/4 5/8
DHD125-250 2.5 945 0.750 630 0.500 473 0.375 0.806 126 1-1/4 5/8
DHD125-300 3 891 0.900 594 0.600 446 0.450 0.965 99 1-1/4 5/8
DHD125-350 3.5 882 1.050 588 0.700 441 0.525 1.176 84 1-1/4 5/8
DHD125-400 4 863 1.200 575 0.800 431 0.600 1.320 71.9 1-1/4 5/8
DHD125-450 4.5 864 1.350 576 0.900 432 0.675 1.523 64 1-1/4 5/8
DHD125-500 5 855 1.500 570 1.000 428 0.750 1.733 57 1-1/4 5/8
DHD125-550 5.5 881 1.650 587 1.100 441 0.825 1.965 53.4 1-1/4 5/8
DHD125-600 6 950 1.800 634 1.200 475 0.900 2.078 52.8 1-1/4 5/8
DHD125-700 7 943 2.100 629 1.400 471 1.050 2.483 44.9 1-1/4 5/8
DHD125-800 8 953 2.400 635 1.600 476 1.200 2.836 39.7 1-1/4 5/8
DHD125-1000 10 933 3.000 622 2.000 467 1.500 3.490 31.1 1-1/4 5/8
DHD125-1200 12 893 3.600 595 2.400 446 1.800 4.300 24.8 1-1/4 5/8
DHD150-200 2 1152 0.600 768 0.400 576 0.300 0.707 192 1-1/2 3/4
DHD150-250 2.5 1125 0.750 750 0.500 563 0.375 0.920 150 1-1/2 3/4
DHD150-300 3 1094 0.900 729 0.600 547 0.450 1.215 121.5 1-1/2 3/4
DHD150-350 3.5 1098 1.050 732 0.700 549 0.525 1.379 104.6 1-1/2 3/4
DHD150-400 4 1086 1.200 724 0.800 543 0.600 1.568 90.5 1-1/2 3/4
DHD150-450 4.5 1187 1.350 791 0.900 593 0.675 1.806 87.9 1-1/2 3/4
DHD150-500 5 1050 1.500 700 1.000 525 0.750 2.077 70 1-1/2 3/4
DHD150-550 5.5 1059 1.650 706 1.100 530 0.825 2.299 64.2 1-1/2 3/4
DHD150-600 6 1053 1.800 702 1.200 527 0.900 2.624 58.5 1-1/2 3/4
DHD150-700 7 1023 2.100 682 1.400 511 1.050 2.972 48.7 1-1/2 3/4
DHD150-800 8 989 2.400 659 1.600 494 1.200 3.485 41.2 1-1/2 3/4
DHD150-1000 10 1020 3.000 680 2.000 510 1.500 4.367 34 1-1/2 3/4
DHD150-1200 12 1037 3.600 691 2.400 518 1.800 5.293 28.8 1-1/2 3/4
DHD200-250 2.5 1800 0.750 1200 0.500 900 0.375 0.900 240 2 1
DHD200-300 3 1683 0.900 1122 0.600 842 0.450 1.042 187 2 1
DHD200-350 3.5 1680 1.050 1120 0.700 840 0.525 1.350 160 2 1
DHD200-400 4 1680 1.200 1120 0.800 840 0.600 1.580 140 2 1
DHD200-450 4.5 1566 1.350 1044 0.900 783 0.675 1.827 116 2 1
DHD200-500 5 1575 1.500 1050 1.000 788 0.750 2.050 105 2 1
DHD200-550 5.5 1592 1.650 1062 1.100 796 0.825 2.366 96.5 2 1
DHD200-600 6 1642 1.800 1094 1.200 821 0.900 2.627 91.2 2 1
DHD200-700 7 1583 2.100 1056 1.400 792 1.050 3.079 75.4 2 1
DHD200-800 8 1685 2.400 1123 1.600 842 1.200 3.560 70.2 2 1
DHD200-1000 10 1575 3.000 1050 2.000 788 1.500 4.497 52.5 2 1
DHD200-1200 12 1566 3.600 1044 2.400 783 1.800 5.580 43.5 2 1

Die Springs Menu

  • Standard Inch Series
    • Medium Duty – Standard Inch Series
    • Medium Heavy Duty – Standard Inch Series
    • Heavy Duty – Standard Inch Series
    • Extra Heavy Duty – Standard Inch Series
  • ISO Inch Series
    • Light Duty – ISO Inch Series
    • Medium Duty ISO Inch Series
    • Heavy Duty – ISO Inch Series
    • Extra Heavy Duty – ISO Inch Series
  • ISO Metric Series
    • Light Duty – ISO Metric Series
    • Medium Duty – ISO Metric Series
    • Heavy Duty – ISO Metric Series
    • Extra Heavy Duty – ISO Metric Series

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The best products, coupled with practical, innovative thinking

Established in 1914, Peterson Spring is the largest privately held spring manufacturer in North America. Through designing, manufacturing and supplying springs, snap-rings, wire forms, clips, clamps, stampings, and a variety of sub-assemblies, Peterson Spring has expanded to 12 worldwide locations.
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Contact Peterson Spring

Main Office
21200 Telegraph Road
Southfield, MI 48033
United States

Phone (248) 799-5400
Fax (248) 357-3176

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