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The National Hardware U Bolt (#546-5/16" x 2-1/2" x 5") is a professional-grade, zinc-plated steel fastener designed for versatile use in automotive, plumbing, and industrial projects. Featuring a 5/16" diameter and complete with matching plate and nuts, it offers superior corrosion resistance and long-lasting durability, backed by over 100 years of National Hardware’s manufacturing excellence.
| ASIN | B000BQUMVU |
| Best Sellers Rank | #112,148 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #90 in U-Bolts #625 in Door Latches & Bolts |
| Brand | National Hardware |
| Color | Zinc plated |
| Compatible Groove Diameter | 0.31 inches |
| Customer Reviews | 4.5 out of 5 stars 283 Reviews |
| Exterior Finish | Zinc |
| Fastener Size | 5/16" x 2-1/2" x 5" |
| Finish Types | Zinc plated |
| Global Trade Identification Number | 00038613126169 |
| Grade Rating | Grade 2 |
| Head Style | U-Bolt |
| Head Type | U-shaped |
| Included Components | National Hardware N222-562 DP2190BC U Bolt Zinc plated, 5/16" x 2-1/2" x 5" |
| Item Diameter | 0.31 inches |
| Item Dimensions | 12.3 x 4.3 x 5.9 inches |
| Item Hardness | Grade 2 |
| Item Highlight | Clamps Around 2-1/2 in Pipe or Posts; Plate and Nuts Included, WeatherGuard Coating Resists Rust |
| Item Type Name | Stanley National Hardware N222-562 DP2190BC U Bolt Zinc plated, 5/16" x 2-1/2" x 5" |
| Item Weight | 0.27 g |
| Manufacturer | National Hardware |
| Manufacturer Grade | Grade Z1 |
| Material | Stainless Steel |
| Material Type | Stainless Steel |
| Metal Type | zinc-coated steel |
| Model | N222-562 |
| Number Of Items | 1 |
| Number of Packs | 1 |
| Number of Pieces | 1 |
| Outside Diameter | 0.31 inches |
| Part Number | N222-315 |
| Screw Head Style | U-Bolt |
| Screw Point Style | U-Bolt |
| Set Name | National Hardware N222-562 DP2190BC U Bolt Set (1 U Bolt, 1 Plate, 2 Nuts) |
| Set Screw Thread Type | Unc Or Unf |
| Size Name | 1 Count (Pack of 1) |
| Thread Coverage | Threaded on Both End |
| Thread Size | 5/16 Inch-18 |
| Thread Style | Right Hand |
| Thread Type | Unc Or Unf |
| UPC | 038613126169 |
| Unit Count | 1 Count |
| Warranty Description | Warranty |
J**N
1 year still up there.
Good quality still holds strong after a year of storms.
J**N
made the project right
strong hardware, good support
T**R
Missing nut
Good quality though I wish they would spin the nuts on all the way when shipping. It was missing one when I got the 4 clamps I bought.
R**.
All good
All good
M**R
Missing parts! Otherwise functional.
One of the nuts was missing. Now I'll have to go to the hardware store to buy a replacement.
P**G
These u-bolts have worked great.
As long as the correct size is ordered these should work on all of you lighter needs. If you want heavy duty then up the diameter from 1/4" to 3/8" or even 1/2" like you see in automotive shackles.
P**I
Strong
Why did you pick this product vs others?: Great size and price
M**H
It's a U bolt
5/16" X 3 " U bolt with 2 nuts and metal plate as shown. Like every other U bolt I have ever bought.
Trustpilot
3 weeks ago
1 month ago