Hager 1-350-7584 US2C Zinc Commercial Retrofit Hinge Screws | 1/4-20 x 1/2" | Package of 12
The Hager 1-350-7584 is a specialized retrofit fastener designed for high-strength commercial door applications. Featuring a heavy-duty 1/4-20 thread pattern, these screws are the industry standard for mounting hinges to reinforced hollow metal frames where maximum pull-out resistance is required. The unique #12 Head diameter ensures these screws fit perfectly into the countersunk holes of standard and heavy-weight commercial hinges, providing a secure, flush seat that prevents door binding and hardware sagging.
Professional Solution for Retrofit & Repair
In many commercial maintenance scenarios, standard 12-24 hinge screws may fail or strip out over time. The Hager 1-350-7584 is the ideal upgrade, utilizing a coarser and stronger 1/4-20 machine thread to provide superior grip in metal frame reinforcements. Finished in a durable US2C Zinc Plating, these screws are engineered to withstand high-traffic use in schools, hospitals, and industrial facilities. Sold in a convenient package of 12, this pack provides enough hardware for a standard two-door (six-hinge) maintenance cycle.
High-Torque Precision Engineering
To ensure a permanent installation without stripping the head, these screws are designed for use with a #3 Phillips Driver Bit. The larger drive size allows for the high torque necessary to fully seat the fastener into metal frames. The Flat Phillips Head (FPHM) design is precision-machined to sit perfectly level with the hinge leaf, maintaining the architectural integrity of the opening while ensuring smooth door operation.
Technical Specifications
| Feature | Specification |
| Model Number | Hager 1-350-7584 |
| Screw Type | Machine Screw (FPHM) |
| Thread Size | 1/4 - 20 |
| Length | 1/2" |
| Head Style | #12 Diameter Flat Phillips Head |
| Drive Required | #3 Phillips Bit |
| Material | High-Strength Steel |
| Finish | US2C (Zinc Plated) |
| Packaging | 12 Screws per Package |
| Primary Use | Commercial Hinge Retrofit & Repair |
Key Product Highlights
- Heavy-Duty Retrofit Design: The 1/4-20 thread provides significantly more holding power than standard 12-24 fasteners, making it ideal for high-frequency or heavy-weight doors.
- Specialized #12 Head: Engineered to fit the standard countersink of architectural hinges while utilizing a larger-diameter machine thread.
- Corrosion Resistance: The US2C Zinc finish provides a professional, industrial look that protects the fastener from oxidation in interior environments.
- Flush Mounting: Precision countersunk head ensures the hardware sits perfectly level to prevent "hinge bind" during door operation.
| Brand | Hager |
| Thread Pattern | 1/4-20 |
| Screw Type | Phillips Head, Machine Screw |
| General - US Finishes | US2C - Zinc Plated |
| Hinge Grade/Thickness | Standard Wt .119 to .146, Heavy Wt .180 to .190 |
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