The Fixture,engine Maintenance,aircr, cataloged under National Stock Number 4920-01-678-7951, is classified within Federal Supply Class 4920 (Aircraft Maintenance and Repair Shop Specialized Equipment) of the Maintenance and Repair Shop Equipment group. The manufacturer of record is Bannister Inc Div Ultra Precision Machining. Government technical data includes 2 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4920-01-678-7951 |
| Primary Part Number | S3S18503000 |
| Item Name | Fixture,engine Maintenance,aircr |
| FSC / FSG | 4920 / 49 — Aircraft Maintenance and Repair Shop Specialized Equipment |
| Manufacturer | Bannister Inc Div Ultra Precision Machining |
| Status | ACTIVE |
| Reference Data and Literature | A1-F402B-IPB-400, INDEX NO. 579 |
| Functional Description | THE EXTRACTOR ASSY CONSISTS OF AN OUTER REACTION SLEEVE AND AN INNER THREADED ADAPTER. BOTH SLEEVE AND ADAPTER HAVE HEXAGONAL SECTIONS FOR SPANNER LOCATION. THE EXTRACTOR IS SCREWED ONTO THE THREADED END OF THE DOWEL AND THE OUTER SLEEVE ROTATED CLOCKWISE UNTIL IT CONTACTS THE TRUNNION FLANGE. THE THREADED ADAPTER IS RESTRAINED BY THE HEXAGONAL SECTION AND THE OUTER SLEEVE ROTATED CLOCKWISE UNTIL THE DOWEL IS EXTRACTED. |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| S3S18503000 PRIMARY | Bannister Inc Div Ultra Precision Machining (USA) |
| Reference | Meaning |
|---|---|
| S3S18503000 | 5/9 Secondary reference Boeing Distribution, Inc. |
| S3S18503000 | 5/9 Secondary reference Cuda II, Inc Div Midwest Aircraft Machine & Tool Company |
| S3S18503000 | 5/9 Secondary reference Rolls-Royce Plc Div Defense (europe) |
| S3S18503000 | 5/9 Secondary reference Fiatavio Spa |
| S3S18503000 | 3/9 Design control — primary reference Rolls-Royce Corporation |
NSN 4920-01-678-7951 is a Fixture,engine Maintenance,aircr, manufactured by Bannister Inc Div Ultra Precision Machining, classified under FSC 4920, Aircraft Maintenance and Repair Shop Specialized Equipment. Status: active.
NSN 4920-01-678-7951 has 1 manufacturer part number on file: S3S18503000 (Bannister Inc Div Ultra Precision Machining).
Key specifications for S3S18503000: Reference Data and Literature: A1-F402B-IPB-400, INDEX NO. 579; Functional Description: THE EXTRACTOR ASSY CONSISTS OF AN OUTER REACTION SLEEVE AND AN INNER THREADED ADAPTER. BOTH SLEEVE AND ADAPTER HAVE HEXAGONAL SECTIONS FOR SPANNER LOCATION. THE EXTRACTOR IS SCREWED ONTO THE THREADED END OF THE DOWEL AND THE OUTER SLEEVE ROTATED CLOCKWISE UNTIL IT CONTACTS THE TRUNNION FLANGE. THE THREADED ADAPTER IS RESTRAINED BY THE HEXAGONAL SECTION AND THE OUTER SLEEVE ROTATED CLOCKWISE UNTIL THE DOWEL IS EXTRACTED.; Part Name Assigned by Controlling Agency: EXTRACTOR. 2 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.
NSN 4920-01-678-7951 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.