Fair Wind Fasteners
Silicon Bronze Eye Nuts
Silicon Bronze Eye Nuts
SKU:SB-EN-1/4-20
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Designed and manufactured exclusively for Fair Wind Fasteners, our Silicon Bronze Eye Nuts can't be found anywhere else.
Die cast of C65500 silicon bronze and polished to a fine finish, our eye nuts surpass the quality of their more commonly found rough sand cast counterparts and will look at home on any finely fitted yacht and be the exquisite but functional detail on your project. Their wide and stable base as well as large diameter eyes provide a robust lifting point and given their dimensions they are made to be stronger than the imperial sized bolt that secures them.
Pair them with a bronze carriage bolt, hex bolt, or machine screw to make these bronze eye nuts function as a bronze eye bolt.
Bronze Eye Nut Dimensions

| Size | A | B | C | D | E | F | G |
| 1/4"-20 | 1/4"-20 UNC | 1.4375" | 0.5625" | 0.625" | 0.2500" | 0.3750" | 0.750" |
| 5/16"-18 | 5/16"-18 UNC | 1.7500" | 0.6875" | 0.750" | 0.3125" | 0.5000" | 1.000" |
| 3/8"-16 | 3/8"-16 UNC | 2.1250" | 0.7500" | 1.000" | 0.3750" | 0.5625" | 1.125" |
| 1/2"-13 | 1/2"-13 UNC | 2.6875" | 0.9375" | 1.000" | 0.5000" | 0.7500" | 1.500" |

Looking at the interior threads I noticed they were very shallow. I measured the ID of the threaded hole to be 0.471 inches, which gives just 35% thread depth, which almost cuts in half the stripping force of the threads. I could not use this in my application where strength was critical.
Thanks for the feedback, John. Thread quality matters to us, so we checked a bunch of the 1/2'-13 eye nuts from the same stock. Their tapped holes measures 0.430', which is within the ASME B1.1 limits for a 1/2'-13 UNC Class 2B internal thread.
A 0.471' reading would be well outside those limits and doesn’t match what we find in our inventory. Calipers often read oversize on internal threads because the jaws catch the entry chamfer or thread crests, so a pin gauge or GO/NO-GO thread plug gauge gives the most accurate check.
Anyone with questions about thread fit or a specific application is welcome to get in touch before ordering and we'll check the items right on our shelves.
Used these to anchor the backrest in my canoe. Sturdy and beautiful!
They sent the wrong bolts by mistake, but they shipped the correct hardware the next day along with a free shipping slip to return. Fantastic quality hardware and the company is a joy to do business with!!
It is perfect! The fit, finish and overall quality are immaculate. Exactly what I was looking for to compliment the project. Couldn’t be happier with the product and it arrived quickly.
High quality product, great custumer service! I am glad I found this company.
.
These eye nuts are high quality polished brass. Will be beautiful replacements for old eyebolts in the transom of my boat.
- 5 stars: 6 (86%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 star: 1 (14%)
Looking at the interior threads I noticed they were very shallow. I measured the ID of the threaded hole to be 0.471 inches, which gives just 35% thread depth, which almost cuts in half the stripping force of the threads. I could not use this in my application where strength was critical.
Thanks for the feedback, John. Thread quality matters to us, so we checked a bunch of the 1/2'-13 eye nuts from the same stock. Their tapped holes measures 0.430', which is within the ASME B1.1 limits for a 1/2'-13 UNC Class 2B internal thread.
A 0.471' reading would be well outside those limits and doesn’t match what we find in our inventory. Calipers often read oversize on internal threads because the jaws catch the entry chamfer or thread crests, so a pin gauge or GO/NO-GO thread plug gauge gives the most accurate check.
Anyone with questions about thread fit or a specific application is welcome to get in touch before ordering and we'll check the items right on our shelves.
Used these to anchor the backrest in my canoe. Sturdy and beautiful!
They sent the wrong bolts by mistake, but they shipped the correct hardware the next day along with a free shipping slip to return. Fantastic quality hardware and the company is a joy to do business with!!
It is perfect! The fit, finish and overall quality are immaculate. Exactly what I was looking for to compliment the project. Couldn’t be happier with the product and it arrived quickly.
High quality product, great custumer service! I am glad I found this company.
.
These eye nuts are high quality polished brass. Will be beautiful replacements for old eyebolts in the transom of my boat.