The Stud,stepped, cataloged under National Stock Number 5307-01-257-2273, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is Sae International Dba Sae International. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-01-257-2273 |
| Primary Part Number | AN155066 |
| Item Name | Stud,stepped |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Shank Diameter | 0.221 INCHES MINIMUM AND 0.231 INCHES MAXIMUM IN |
| Surface Finish | 32.0 MICROINCHES NUT THD |
| Surface Finish | 63.0 MICROINCHES SHANK |
| Surface Finish | 32.0 MICROINCHES STUD THD |
| Surface Treatment Document and Classification | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM STUD THREAD IN |
| Thread Length | 0.562 INCHES MINIMUM AND 0.633 INCHES MAXIMUM NUT THREAD IN |
| Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| Style Designator | STEPPED |
| Thread Pitch Diameters | +0.2930 TO 0.2945 INCHES STUD THREAD IN |
| Material Document and Classification | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.250 INCHES NUT THREAD IN |
| Nominal Thread Size | 0.312 INCHES STUD THREAD IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A NUT THREAD A |
| Thread Quantity Per Inch | 18 STUD THREAD |
| Thread Quantity Per Inch | 28 NUT THREAD |
| Material | STEEL COMP 8740 |
| Thread Series Designator | UNF NUT THREAD |
| Thread Series Designator | UNS STUD THREAD |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| AN155066 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| AN155066 | 3/9 Design control — primary reference U.S. Government activity |
| AS155066 | D/9 Drawing number reference only U.S. Government activity |
| AN155066 | 5/9 Secondary reference U.S. Government activity |
NSN 5307-01-257-2273 is a Stud,stepped, manufactured by Sae International Dba Sae International, classified under FSC 5307, Studs. Status: active.
NSN 5307-01-257-2273 has 1 manufacturer part number on file: AN155066 (Sae International Dba Sae International).
Key specifications for AN155066: Shank Diameter: 0.221 INCHES MINIMUM AND 0.231 INCHES MAXIMUM IN; Surface Finish: 32.0 MICROINCHES NUT THD; Surface Finish: 63.0 MICROINCHES SHANK; Surface Finish: 32.0 MICROINCHES STUD THD. 22 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.