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Socket head cap screws offer a reliable, high-strength solution for mounting and assembling optical components in precision systems. Manufactured from durable alloy steel, these screws feature a sleek, consistent design that is ideal for use in many environments. The hexagonal socket head design allows for easy installation in tight spaces using standard Allen Wrenches, ensuring repeatable, secure fastening without damaging surrounding optics or mounts.
Available in English and Metric threading and a variety of hex key sizes, these cap screws are perfect for integration with optical breadboards, translation stages, and custom assemblies. Whether you're building a prototype or maintaining alignment-critical systems, these versatile fasteners offer dependable performance and easy compatibility with Edmund Optics' mechanical components.
Capscrews are used to fasten components securely in optical systems, mounts, and mechanical assemblies where precision and durability are necessary.
A cap screw is designed to fit tightly into a tapped hole and often provides a cleaner, more secure fit than a standard bolt. Unlike bolts which are tightened using a nut, socket head cap screws have a hexagonal socket making it easy to secure using an Allen wrench.
Edmund Optics' cap screws are typically manufactured from alloy steel for corrosion resistance and strength in lab or production environments.
Yes, if not damaged or over-torqued, they can be reused repeatedly. Always check thread integrity and apply proper torque when reassembling.
| Allen Wrench Size Chart | |||||
| Allen Wrench Stock No. | Allen Wrench Hex Key Size | For Socket Head Cap | For Socket Head Set | For Button Head Cap | |
| English | #58-639 | 0.028" | N/A | #0 | N/A |
| #58-638 | 0.035" | N/A | #2 | #0 | |
| #56-271 | 0.050" | #0 | #4 | #2 | |
| #58-637 | 1/16" | #1 | #6 | #3 & #4 | |
| #56-270 | 1/64" | #2 & #3 | #8 | #5 & #6 | |
| #55-188 | 3/32" | #4 & #5 | #10 | #8 | |
| #55-189 | 7/64" | #6 | N/A | N/A | |
| #03-662 | 1/8" | N/A | ¼" | #10 | |
| #55-190 | 9/64" | #8 | N/A | N/A | |
| #55-191 | 5/32" | #10 & #12 | 5/16" | #12 & ¼" | |
| #55-192 | 3/16" | ¼" | 3/8" | 5/16" | |
| Metric | #58-636 | 0.9mm | N/A | M2 | N/A |
| #55-452 | 1.5mm | M1.6 & M2 | M3 | M2.5 | |
| #57-445 | 2mm | M2.5 & M2.6 | M4 | M3 | |
| #55-451 | 2.5mm | M3 | M5 | M4 | |
| #55-199 | 3mm | M4 | M6 | M5 | |
| #55-200 | 5mm | M6 | M10 | M8 | |
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