DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Fusible Links
 1 |  2 |  3 |
 4 |  5 | |
 6 |  7 |  8 |
 9 |  10 |
Automatically close fire doors, windows, lids, dampers, vents, and more in the event of a fire. High temperatures melt the solder bond between links, causing them to separate and release their load. Install with S-hooks or chain (not included).
To ensure safety, replace links annually and do not paint or coat them. Use links in straight-pull applications only.
Style 1-5 links are for use on fire doors, windows, and lids.
Style 6 and 7 links are often used on fire doors, windows, hatches, dampers, and blowers.
Style 8 links are commonly used on fire doors, smoke and heat vents, and ducts.
Style 9 links are good for range hood applications.
Style 10 links are designed for use on dampers.
Mounting Hole | Overall | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Style | Melting Temperature, °F | Capacity, lbs. | Center-to-Center | Dia. | Lg. | Ht. | Specifications Met | Each | |
| 1 | 135° | 3-45 | 5/8" | 1/4" | 1 3/16" | 13/16" | UL Listed | 0000000 | 000000 |
| 1 | 165° | 3-45 | 5/8" | 1/4" | 1 3/16" | 13/16" | UL Listed | 0000000 | 0000 |
| 1 | 165° | 3-45 | 7/8" | 5/16" | 1 3/8" | 7/8" | UL Listed | 0000000 | 0000 |
| 2 | 165° | 1-8 | 7/8" | 3/16" | 1 5/16" | 7/16" | UL Listed | 0000000 | 0000 |
| 2 | 200° | 1-8 | 7/8" | 3/16" | 1 5/16" | 1/8" | UL Listed | 0000000 | 0000 |
| 3 | 135° | 3-10 | 15/16" | 1/4" | 1 3/8" | 1/2" | UL Listed | 0000000 | 0000 |
| 3 | 165° | 3-10 | 15/16" | 3/16" | 1 3/8" | 1/2" | UL Listed | 0000000 | 0000 |
| 3 | 165° | 3-10 | 15/16" | 3/16" | 3 3/16" | 1/2" | UL Listed | 0000000 | 0000 |
| 3 | 165° | 3-10 | 15/16" | 1/4" | 1 3/8" | 1/2" | UL Listed | 0000000 | 0000 |
| 3 | 212° | 3-10 | 15/16" | 3/16" | 1 3/8" | 1/2" | UL Listed | 0000000 | 0000 |
| 3 | 212° | 3-10 | 15/16" | 1/4" | 1 3/8" | 1/2" | UL Listed | 0000000 | 0000 |
| 3 | 280° | 3-10 | 15/16" | 1/4" | 1 3/16" | 1/2" | UL Listed | 0000000 | 0000 |
| 4 | 135° | 3-20 | 1 5/8" | 3/8" | 2 3/8" | 3/4" | UL Listed | 0000000 | 0000 |
| 4 | 165° | 3-20 | 1 5/8" | 3/8" | 2 3/8" | 3/4" | FM Approved, UL Listed | 0000000 | 0000 |
| 4 | 210° | 3-20 | 1 5/8" | 3/8" | 2 3/8" | 3/4" | FM Approved, UL Listed | 0000000 | 0000 |
| 4 | 280° | 3-20 | 1 5/8" | 3/8" | 2 3/8" | 3/4" | FM Approved, UL Listed | 0000000 | 0000 |
| 4 | 360° | 3-20 | 1 5/8" | 3/8" | 2 3/8" | 3/4" | FM Approved, UL Listed | 0000000 | 0000 |
| 5 | 165° | 3-50 | 1 5/8" | 3/8" | 2 3/8" | 1/8" | UL Listed | 0000000 | 0000 |
| 5 | 212° | 3-50 | 1 5/8" | 3/8" | 2 3/8" | 1/8" | UL Listed | 0000000 | 0000 |
| 6 | 165° | 1-30 | 1 3/4" | 7/16" | 2 1/2" | 3/4" | UL Listed | 0000000 | 00000 |
| 6 | 212° | 1-30 | 1 3/4" | 7/16" | 2 1/2" | 3/4" | UL Listed | 0000000 | 00000 |
| 7 | 165° | 2-60 | 1 3/4" | 7/16" | 2 1/2" | 3/4" | UL Listed | 0000000 | 00000 |
| 8 | 165° | 5-50 | 1" | 1/4" | 1 1/2" | 5/8" | FM Approved, UL Listed | 0000000 | 00000 |
| 8 | 210° | 5-50 | 1" | 1/4" | 1 1/2" | 5/8" | FM Approved, UL Listed | 0000000 | 00000 |
| 8 | 285° | 5-50 | 1" | 1/4" | 1 1/2" | 5/8" | FM Approved, UL Listed | 0000000 | 00000 |
| 9 | 135° | 10-40 | 1 11/16" | 5/16" | 2 1/4" | 13/16" | UL Listed | 0000000 | 0000 |
| 9 | 165° | 10-40 | 1 11/16" | 5/16" | 2 1/4" | 13/16" | UL Listed | 0000000 | 0000 |
| 10 | 165° | 3-10 | 15/16" | 3/16" | 2 3/4" | 1/16" | UL Listed | 0000000 | 0000 |
| 10 | 165° | 3-10 | 15/16" | 3/16" | 3 3/4" | 1/2" | UL Listed | 0000000 | 0000 |