The Mandrel,expansion, cataloged under National Stock Number 3460-00-274-7380, is classified within Federal Supply Class 3460 (Machine Tool Accessories) of the Metalworking Machinery (continued) group. The manufacturer of record is Sisters J&j, Inc. Government technical data includes 8 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3460-00-274-7380 |
| Primary Part Number | A-A-51129 |
| Item Name | Mandrel,expansion |
| FSC / FSG | 3460 / 34 — Machine Tool Accessories |
| Manufacturer | Sisters J&j, Inc |
| Status | ACTIVE |
| Design Type | STEP JAW |
| Work Holding Facility | JAW |
| Auxiliary Center | NOT INCLUDED |
| Work Holding Facility Length | 0.500 INCHES NOMINAL AND 1.000 INCHES NOMINAL AND 1.500 INCHES NOMINAL IN |
| Departure From Cited Designator | EXCEPT FOR SIZE DESIGNATOR |
| Work Holding Facility Quantity | 1 SET |
| Size Designator | 1 |
| Expansion Range | +0.500 TO 1.000 INCHES IN |
| 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 |
|---|---|
| A-A-51129 PRIMARY | Sisters J&j, Inc (USA) |
| Reference | Meaning |
|---|---|
| A-A-51129 | 5/9 Secondary reference Federal Commercial Item Description Promulgated by General Services Administration Washington DC |
| OO-M-251 | 5/9 Secondary reference U.S. Government activity |
| A-A-51129A TY III, SIZE 1 | 5/9 Secondary reference Federal Commercial Item Description Promulgated by General Services Administration Washington DC |
| MM2 | 5/9 Secondary reference Dunham Tool Co Inc |
| A-A-51129 TY 2 SIZE 1 | 5/9 Secondary reference Federal Commercial Item Description Promulgated by General Services Administration Washington DC |
NSN 3460-00-274-7380 is a Mandrel,expansion, manufactured by Sisters J&j, Inc, classified under FSC 3460, Machine Tool Accessories. Status: active.
NSN 3460-00-274-7380 has 1 manufacturer part number on file: A-A-51129 (Sisters J&j, Inc).
Key specifications for A-A-51129: Design Type: STEP JAW; Overall Length: 8.500 INCHES MINIMUM IN; Work Holding Facility: JAW; Auxiliary Center: NOT INCLUDED. 8 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.