--- product_id: 278092187 title: "National Hardware N222-471 2193BC U Bolt in Stainless Steel" brand: "national hardware" price: "$22.55" currency: USD in_stock: true reviews_count: 5 url: https://www.desertcart.us/products/278092187-national-hardware-n222-471-2193bc-u-bolt-in-stainless-steel store_origin: US region: United States of America --- # National Hardware N222-471 2193BC U Bolt in Stainless Steel **Brand:** national hardware **Price:** $22.55 **Availability:** ✅ In Stock ## Quick Answers - **What is this?** National Hardware N222-471 2193BC U Bolt in Stainless Steel by national hardware - **How much does it cost?** $22.55 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/278092187-national-hardware-n222-471-2193bc-u-bolt-in-stainless-steel) ## Best For - national hardware enthusiasts ## Why This Product - Trusted national hardware brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description National Hardware N222-471 2193BC U Bolt in Stainless Steel ## Features - About this item Authorized Replacement for Stanley Hardware Stock #N222-471 Designed for fastening products to pipe, wood, etc Suitable for automotive, plumbing and other home and industrial applications Plate and nuts included Excellent for marine and other outdoor applications ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000BPK8F6 | | Best Sellers Rank | #60,131 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #47 in U-Bolts | | Brand | National Hardware | | Color | Satin Nickel | | Date First Available | August 17, 2005 | | Department | Unisex-Adult | | Exterior Finish | Zinc | | Fastener Type | U-Bolt | | Global Trade Identification Number | 00038613191440 | | Head Style | Cupped | | Head Type | Button | | Is Discontinued By Manufacturer | No | | Item Diameter | 0.31 Inches | | Item Hardness | Grade 8 | | Item Weight | 0.32 ounces | | Item model number | N222-471 | | Manufacturer | National Hardware | | Manufacturer Grade | Grade 8 | | Material | Alloy Steel | | Maximum Shear Strength | 50-60 ksi (345-414 MPa) | | Metal Type | Stainless Steel | | Size | #546-5/16"x2-1/2"x5" | | Thread Class | 1A | | Thread Size | 5/16"-18 | | Thread Style | Left Hand | | Thread Type | Unc | | UPC | 038613191440 | ## Product Details - **Exterior Finish:** Zinc - **Head Style:** Cupped - **Manufacturer Grade:** Grade 8 - **Material:** Alloy Steel - **Thread Size:** 5/16"-18 ## Images ![National Hardware N222-471 2193BC U Bolt in Stainless Steel - Image 1](https://m.media-amazon.com/images/I/61LAi0LgmQL.jpg) ![National Hardware N222-471 2193BC U Bolt in Stainless Steel - Image 2](https://m.media-amazon.com/images/I/91Oh5L19yHL.jpg) ![National Hardware N222-471 2193BC U Bolt in Stainless Steel - Image 3](https://m.media-amazon.com/images/I/51U7uqb+y0L.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: What is the thread size so that I can order extra nuts?** A: 5/16-18 (course). Fine thread would be 5/16-24. Checked with a thread gage and confirmed 5/16-18 **Q: Is there a link for a u bolt to fit a 1-3/4" od pipe, and long enough to go through 4x4 lumber and allowing for bolts and a little xtra room?** A: No, I've used it supporting cat5 to at giant tent in a industrial setting on 2'' conduit **Q: What would be the one for a 6" pvc pipe?** A: I purchased a 2” for a 2”pipe and it fit perfectly. I assume you would therefor need a 6” **Q: Can you please send a direct link for the u bolt that will fit around the 4”pvc pipe ?** A: https://www.amazon.com/National-Hardware-N222-174-2190BC-plated/dp/B000BPRP8Y/ref=psdc_16409751_t2_B000BPK8F6 ## Customer Reviews ### ⭐⭐⭐⭐⭐ U Bolt *by F***E on Reviewed in Canada on 10 July 2020* Product as described. Thanks. ### ⭐ to the right dimension *by L*** on Reviewed in Canada on 8 June 2020* The item came in but the diameter of the metal was 3/16" and not 1/4".The tag on the item also states 1/4.. ### ⭐⭐⭐⭐⭐ Not the correct size, but easy to make fit! *by B***K on Reviewed in the United States on 4 August 2013* My search for a replacement stainless steel U-bolt for my antenna mast found this one. The existing U-bolt is steel & was rusting after years exposed to the elements.As my review title says, this U-bolt is too narrow at 1-1/8". I needed a 1-1/4" U-bolt, the standard antenna mast size. This is stainless steel, so there's no problems with resizing it on a piece of 1-1/4" pipe. No need to worry about any scrapes or nicks rusting on stainless steel. The resizing was very easy to do on an old piece of pipe. I Hammered the U-bolt onto the pipe, then use a vise to finalize the shape. To my surprise, the plate still fits perfectly! :)The pros:+ $6.46, which included free shipping, or $2.10 + free shipping if you get this when it's an "add-on item"!+ 300 grade Stainless steel, so it will never rust & it will last forever!+ Comes with a stainless steel plate & 2 stainless steel 1/4-20 nuts.The cons:+ Doesn't come in 1-1/4" size.I bought 3 of these & I may up the product rating to 5 stars after I install one of these U-bolts.► Update - August 8, 2013I installed one of these today on a 1-1/4" antenna pole & the resizing made the U-bolt a perfect fit. I've decided to up my product rating to 5 stars.► Update October 21, 2015I have 2 of these installed now. The first one I installed on an antenna pole, 2 years ago, still looks like new! Not wanting to be without a couple on hand, I just added another one of these on my Amazon order. I couldn't pass up the $2.10 + free shipping price!. ## Frequently Bought Together - National Hardware N222-471 2193BC U Bolt in Stainless Steel - Hillman 3002 5/16-18-Inch Stainless Steel Wing Nut, 4-Pack --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/278092187-national-hardware-n222-471-2193bc-u-bolt-in-stainless-steel](https://www.desertcart.us/products/278092187-national-hardware-n222-471-2193bc-u-bolt-in-stainless-steel) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-19*