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AN505-2R4
Aeronautical Standard Machine Screw
Description
Fastener Length: 1/4", Thread: 2-56, Thread Length: 1/4"
Specifications
| Countersink Angle | Between 80.0 degrees and 82.0 degrees |
|---|---|
| Fastener Length | Between 0.219 inches and 0.250 inches |
| Head Diameter | Between 0.150 inches and 0.172 inches |
| Head Style | Flat countersunk |
| Internal Drive Style | Cross recess type 1 |
| Length | 1/4 |
| Material | Steel |
| Min. Tensile Strength (psi) | 55 pounds per square inch |
| Screw Material | Steel comp 1010 |
| Screw Material Specification | Qq-s-630 federal specification single material response or qq-s-631 federal specification single material response or qq-s-634 federal specification single material response |
| Screw Surface Treatment | Cadmium |
| Screw Surface Treatment Specification | Cl 3 federal specification single treatment response type 1 qq-p-416 |
| Thread Class | 2a |
| Thread Diameter | 0.086 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.214 inches and 0.250 inches |
| Thread Qty | 56 |
| Thread Qty Per Inch (tpi) | 56 |
| Thread Series | UNC |
| Thread Series Designator | Unc (coarse thread) |
| Thread Size | 2 |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- AN505-2R4
- AN505-2R10
Cross-reference
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- NAS662C2R4 NAS #2-56 · 1/4 in · Flat countersunk · Steel
- AN505C2-4 AN #2-56 · 1/4 in · Flat countersunk · Steel
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Catalog data updated 2026-07-05. Report a data error