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About the Product
The Fortress FX-23 15 lb Anchor is the legendary choice for 39–45 ft boats. After test after test—from coast to coast and around the world—Fortress has earned the designation The World's Best Anchor from boaters and marine experts. Built with precision, high-tech materials, and rigorous real‑world testing, the FX-23 delivers unmatched performance, quality, and value—without the weight of traditional steel anchors.
Why Fortress FX-23 Stands Apart
- Precision-machined aluminum alloy that is as strong as steel, but only half the weight—making deployment and retrieval easier than ever.
- Rustproof and corrosion resistant for lasting performance in harsh marine environments.
- Sharper than dull-edged steel anchors for quicker set and deeper penetration in common sea bottoms.
- Faster setting and superior holding power across hard sand and soft mud bottoms.
- Disassemblable for compact storage and effortless handling; excellent as a spare or storm anchor.
- Lifetime Parts Replacement Warranty—Free replacement of any damaged anchor part...Forever!*
- Adjustable 32° to 45° fluke angle—an exclusive, patented feature that dramatically increases holding power in soft mud bottoms.
- Tough anodized finish for a handsome, durable, and corrosion-resistant exterior.
Engineered for 39–45 ft Boats
The FX-23 is the Fortress selection for mid-to‑large boats, precisely matched to 39′–45′ hulls. Weighing 15 lb, it delivers Fortress-level performance where it matters most—on longer runs and in challenging bottoms.
Key specs at a glance
- Model: FX-23
- Boat Length compatibility: 39′–45′
- Weight: 15 lb
- Working Load: 2,000 lb
- 32° Hard Sand Holding Power: 8,000 lb
- 32° Soft Mud Holding Power: 1,200 lb
- 45° Soft Mud Holding Power: 2,400 lb
- A (Shank Length): 36 in
- B (Fluke Length): 21 in
- C (Stock Length): 29 in
- Proof Coil Chain: 3/8 in
- Nylon Rope: 5/8 in
- Shackle Size: 3/8 in
Designed to be strong, reliable, and remarkably easy to handle, the FX-23 is your best choice for confident anchoring on boats in the 39–45 ft range. Whether you’re cruising coastal waters or anchoring through a squall, Fortress delivers the holding power, durability, and value you demand.
| Feature | Benefit |
| Precision-machined from an aluminum alloy that is as strong as steel, but only half the weight. |
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| Can be disassembled |
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| Lifetime Parts Replacement Warranty |
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| Adjustable 32 to 45 fluke angle |
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| Tough anodized finish |
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| FORTRESS SELECTION GUIDE | |||||||||
| Model | FX-7 | FX-11 | FX-16 | FX-23 | FX-37 | FX-55 | FX-85 | FX-125 | |
| Boat Length | |||||||||
| ft | 16'-27' | 28'-32' | 33'-38' | 39'-45' | 46'-51' | 52'-58' | 59'-68' | 69'-150' | |
| m | 5-8 | 8-10 | 10-12 | 12-14 | 14-15 | 16-18 | 18-21 | 21-46 | |
| Weight | lb | 4 | 7 | 10 | 15 | 21 | 32 | 47 | 69 |
| kg | 1.8 | 3.2 | 4.5 | 6.8 | 9.5 | 14.4 | 21.2 | 31.1 | |
| Replaces Steel Anchors | lb | 6-9 | 10-13 | 14-18 | 19-28 | 33-50 | 50-65 | 70-90 | 100-170 |
| kg | 3-4 | 5-6 | 6-8 | 9-13 | 15-23 | 23-29 | 32-41 | 45-77 | |
| HOLDING POWER | |||||||||
| Model | FX-7 | FX-11 | FX-16 | FX-23 | FX-37 | FX-55 | FX-85 | FX-125 | |
| Working Load | |||||||||
| lb | 700 | 900 | 1.250 | 2,000 | 3,000 | 4,000 | 5,250 | 6,750 | |
| kg | 318 | 408 | 567 | 907 | 1,351 | 1,814 | 2,381 | 3,062 | |
| 32 Degree Hard Sand Holding Power | lb | 2,800 | 3,600 | 5,000 | 8,000 | 12,000 | 16,000 | 21,000 | 27,000 |
| kg | 1,270 | 1,633 | 2,268 | 3,629 | 5,443 | 7,258 | 9,536 | 12,247 | |
| 45 Degree Soft Mud Holding Power | lb | 840 | 1,080 | 1,500 | 2,400 | 3,600 | 4,800 | 6,300 | 8,100 |
| kg | 381 | 490 | 680 | 1,089 | 1,633 | 2,177 | 2,858 | 3,674 | |
| 32 Degree Soft Mud Holding Power | lb | 420 | 540 | 750 | 1,200 | 1,800 | 2,400 | 3,150 | 4,050 |
| kg | 191 | 245 | 340 | 544 | 816 | 1,089 | 1,429 | 1,837 | |
| DIMENSIONS | |||||||||
| Model | FX-7 | FX-11 | FX-16 | FX-23 | FX-37 | FX-55 | FX-85 | FX-125 | |
| "A" Shank Length | |||||||||
| in | 24" | 27" | 31" | 36" | 40" | 46" | 51" | 56" | |
| mm | 610 | 685 | 787 | 914 | 1,016 | 1,168 | 1,295 | 1,422 | |
| "B" Fluke Length | in | 14" | 16" | 18" | 21" | 24" | 27" | 30" | 33" |
| mm | 356 | 406 | 457 | 533 | 610 | 686 | 762 | 838 | |
| "C" Stock Length | in | 19" | 22" | 25" | 29" | 32" | 37" | 41" | 45" |
| mm | 483 | 559 | 635 | 737 | 813 | 940 | 1,041 | 1,143 | |
| SUPPORT HARDWARE | |||||||||
| Model | FX-7 | FX-11 | FX-16 | FX-23 | FX-37 | FX-55 | FX-85 | FX-125 | |
| Proof Coil Chain | |||||||||
| in | 3/16" | 1/4" | 5/16" | 3/8" | 3/8" | 1/2" | 1/2" | 1/2" | |
| mm | 5 | 6 | 8 | 9 | 9 | 13 | 13 | 13 | |
| Nylon Rope** | in | 3/8" | 3/8" | 1/2" | 5/8" | 3/4" | 7/8" | 1" | 1 1/4" |
| mm | 9 | 9 | 13 | 16 | 19 | 22 | 25 | 32 | |
| Shackle Size | in | 1/4" | 1/4" | 5/16" | 3/8" | 7/16" | 1/2" | 5/8" | 5/8" |
| mm | 6 | 6 | 8 | 10 | 12 | 12 | 16 | 16 | |
| NOTE: Hard sand holding power figures above represent loads actually achieved on production FORTRESS and Guardian anchors under controlled horizontal pull conditions without dragging or resulting in disabling structural deformation. ** Rope recommendations are based on 25% of breaking strength. Rope must be in good condition. | |||||||||
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