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Garage Door Springs
The garage door springs chart listed below will help you decide which garage door spring you need if you are unable to locate the number printed on your current spring.
| Catalog Number | "A" Length Over Coils | "B" Outside Dia. | "C" Type of Ends | "D" Wire Dia. & Gauge | Initial Tension ** | Max. Allowable Stretch (Inch.) |
| P920 | 20" | 1 1/4" | PLUG | (.148) #9 | 45 - 55 | 16 |
| P928 | 28" | 1 1/4" | PLUG | (.148) #9 | 45 - 55 | 18.5 |
| P720 | 20" | 1 5/16" | PLUG | (.177) #7 | 110 - 120 | 16 |
| P728 | 28" | 1 5/16" | PLUG | (.177) #7 | 110 - 120 | 18.5 |
| P730 | 30" | 1 5/16" | PLUG | (.177) #7 | 110 - 120 | 20 |
| P732 | 32" | 1 5/16" | PLUG | (.177) #7 | 110 - 120 | 21.25 |
| P736 | 36" | 1 5/16" | PLUG | (.177) #7 | 110 - 120 | 24 |
| P520 | 20" | 1 5/8" | PLUG | (.207) #5 | 135 - 145 | 16 |
| P528 | 28" | 1 5/8" | PLUG | (.207) #5 | 135 - 145 | 22 |
| P530 | 30" | 1 5/8" | PLUG | (.207) #5 | 135 - 145 | 25 |
| P532 | 32" | 1 5/8" | PLUG | (.207) #5 | 135 - 145 | 26.5 |
| P536 | 36" | 1 5/8" | PLUG | (.207) #5 | 135 - 145 | 26.5 |
| P542 | 42" | 1 5/8" | PLUG | (.207) #5 | 135 - 145 | 28.5 |
| P320 | 20" | 2" | PLUG | (.244) #3 | 165 - 185 | 16 |
| P328 | 28" | 2" | PLUG | (.244) #3 | 165 - 185 | 18.5 |
| P330 | 30" | 2" | PLUG | (.244) #3 | 165 - 185 | 21.5 |
| P332 | 32" | 2" | PLUG | (.244) #3 | 165 - 185 | 21.5 |
| P336 | 36" | 2" | PLUG | (.244) #3 | 165 - 185 | 24.25 |
| P342 | 42" | 2" | PLUG | (.244) #3 | 165 - 185 | 28.5 |
| SL728 | 28" | 1 5/16" | HOOK | (.177) #7 | 110 - 120 | 18.5 |
| SL730 | 30" | 1 5/16" | HOOK | (.177) #7 | 110 - 120 | 20 |
| SL732 | 32" | 1 5/16" | HOOK | (.177) #7 | 110 - 120 | 21.25 |
| SL528 | 28" | 1 5/8" | HOOK | (.207) #5 | 135 - 145 | 22 |
| SL530 | 30" | 1 5/8" | HOOK | (.207) #5 | 135 - 145 | 25 |
| SL532 | 32" | 1 5/8" | HOOK | (.207) #5 | 135 - 145 | 26.5 |
