AN4-20A
Bolt, Machine, Aircraft, Hex Head, 1/4-28 x 2-1/2, Alloy Steel
| A | Head across flats | 0.4375" A/F |
| B | Head height | 0.1719" |
| C | Length | 2.500" |
| D | Body diameter | Ø0.250" |
| E | Thread | 1/4-28 |
Simplified bolt representation, drawn to scale from the listed catalog dimensions — not the exact profile of this part's standard.
Where to Buy
No certified supplier on record currently lists AN4-20A. It is a valid part per its standard — it may be available to order, so contact a distributor directly.
Technical Specifications
| Category | bolt |
|---|---|
| Thread size | 1/4-28 |
| Thread class | 3A |
| Threads per inch | 28 |
| Thread diameter | 0.25" |
| Length | 2.5" |
| Body diameter / across flats | 0.25" |
| Head diameter / across flats | 0.4375" |
| Head height | 0.1719" |
| Material | Alloy Steel |
| Finish | Cadmium Plated |
| Head style | Hex |
| Drive type | External Wrenching |
| Tensile strength | 125 ksi |
| Grip Basis | Overall length approximated as dash/8 in |
| Shank Drilled | No |
Standards & Cross-References
- Defined byAN4Bolt, Machine, Aircraft, 1/4-28