Rockwood SP1053 Socket Flat Head Machine Screw | 5/16-18 x 2-1/2"
The Rockwood SP1053 is a high-strength replacement fastener designed specifically for Type 1HD (Heavy Duty) door pull mounting systems. Crafted from durable stainless steel with a US32D Satin Finish, this 5/16-18 x 2-1/2" machine screw is engineered to provide a secure, vibration-resistant connection for commercial door handles on 1-3/4" thick doors. Its socket head design allows for maximum torque, ensuring that high-traffic pulls remain tight and safe.
Heavy-Duty Engineering & Precision Fit
- Type 1HD Compatibility: Specifically manufactured as a replacement screw for Rockwood’s Heavy Duty (HD) mounting sets. It is the essential hardware for maintaining the integrity of large architectural pulls.
- Superior Strength: The large overall size and high-grade stainless steel construction are designed to withstand the constant mechanical stress of busy commercial entrances.
- Positive Tightening: Features a hex drive socket that requires a 3/16" Allen wrench, allowing for "positive tightening" without the risk of stripping the head common with standard Phillips screws.
- Architectural Finish: The US32D Satin Stainless Steel head provides a clean, professional look that resists corrosion and matches standard architectural hardware finishes.
Technical Specifications
- Model: Rockwood SP1053
- Thread Size: 5/16-18
- Length: 2-1/2" Overall
- Head Type: Socket Flat Head
- Material: Stainless Steel
- Drive: 3/16" Hex (Allen)
- Application: 1-3/4" Thick Doors
- Finish: US32D (Brushed/Satin Stainless)

| Brand | Rockwood |
| Thread Pattern | 5/16-18 |
| Screw Type | Machine Screw |
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