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🛠️ Screw it right, screw it fast — the pro’s choice for masonry mastery!
This pack of 100 high-quality 1/4 x 3-3/4" flat head concrete screw anchors is engineered from durable 1022A carbon steel with a diamond tail for faster drilling. Featuring a corrosion-resistant Blue Ruspert finish and acid resistance up to 1000 hours, these screws deliver reliable, long-lasting anchoring in masonry, block, and brick applications. Ideal for professionals and serious DIYers seeking efficiency and strength in one package.








| ASIN | B0C7MFF7X4 |
| Best Sellers Rank | #17,618 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #24 in Concrete Screws |
| Brand | Bobibbi |
| Color | Blue |
| Customer Reviews | 4.6 4.6 out of 5 stars (347) |
| Drive System | Phillips |
| Exterior Finish | Alloy Steel |
| Fastener Size | 1/4 x 3-3/4" |
| Fastener Type | Screw |
| Finish Types | Blue Ruspert |
| Head Type | Flat |
| Item Diameter | 0.25 inches |
| Item Dimensions | 6.22 x 4.65 x 2.83 inches |
| Manufacturer | Bobibbi |
| Material Type | Carbon Steel |
| Number Of Items | 100 |
| Outside Diameter | 0.25 inches |
| Part Number | 1/4 x 3-3/4" Flat |
| Screw Head Style | Flat |
| Set Name | Bobibbi 1/4 x 3-3/4" Flat Head Concrete Screw Anchor Set (100 Pieces) |
| Size Name | 1/4 x 3-3/4" |
| Thread Coverage | Partially Threaded |
| Thread Size | 1/4 |
| Thread Style | Right Hand |
| Thread Type | Unc |
| Unit Count | 1 Count |
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