Product Description
10-24 UNC A2 Stainless Steel Countersunk Phillips Machine Screws
These 10-24 UNC countersunk machine screws are manufactured from A2-grade stainless steel, providing good corrosion resistance for general engineering, fabrication, equipment and maintenance applications.
The flat countersunk head is designed to sit flush with the surrounding surface when installed in a correctly prepared countersink. A Phillips cross recess allows convenient installation using a compatible screwdriver bit or powered driver.
Product Details
- Thread size: No.10-24 UNC
- Thread series: Unified National Coarse
- Threads per inch: 24 TPI
- Nominal thread diameter: 0.190" (approximately 4.83mm)
- Material: A2-grade stainless steel
- Head style: Flat countersunk
- Drive type: Phillips cross recess
- Approximate head diameter: 0.34" (8.64mm)
- Approximate head height: 0.13" (3.30mm)
- Machine-screw standard: ASME B18.6.3
- Unified thread standards: ASME B1.1 and BS 1580-3
Please note: Countersunk machine-screw lengths are measured over the complete screw, including the head.
Typical Applications
- Machinery and equipment assembly
- Panels, covers and access plates
- Electrical and electronic enclosures
- Marine and outdoor equipment
- Automotive and restoration work
- General engineering and maintenance
- Applications requiring a flush finished surface
Installation Information
These screws are intended for use with a compatible 10-24 UNC nut or a component containing a correctly formed 10-24 UNC internal thread. Prepare the countersink to suit the screw head and ensure the head is properly supported rather than tightening it against an incorrectly shaped recess.
Use a correctly fitting Phillips driver and apply controlled torque to avoid damaging the recess. When fastening into stainless-steel nuts or tapped components, a suitable anti-seize compound may help reduce the possibility of thread galling.
Pack Quantities
Available in packs of 5, 10, 20, 50, 100, 250, 500 or 1,000 screws, depending on the selected length.
View our complete range of machine screws.

| A | B | C | D | E |
| 10-24 | 3/4" | 0.34" | 0.13" | 24 |
| 10-24 | 1" | 0.34" | 0.13" | 24 |
| 10-24 | 1/2" | 0.34" | 0.13" | 24 |
Please Note: Specifications given are intended as a guide only. If critical to your project please check with us first.