The Boss-Main Grbx, cataloged under National Stock Number 2915-01-528-8388, is classified within Federal Supply Class 2915 (Engine Fuel System Components, Aircraft and Missile Prime Movers) of the Engine Accessories group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2915-01-528-8388 |
| Primary Part Number | 481931 |
| Item Name | Boss-Main Grbx |
| FSC / FSG | 2915 / 29 — Engine Fuel System Components, Aircraft and Missile Prime Movers |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Criticality Code Justification | FEAT |
| Reference Data and Literature | T.O.2J-TF33-34,F45-I19 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 481931 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 481931 | Paramount Machine Company, Inc. Dba Paramount Machine Co Inc (USA) |
| 481931 | Rtx Corporation Div Pratt & Whitney (USA) |
| Reference | Meaning |
|---|---|
| 481931 | 5/9 Secondary reference Dover Tool of Connecticut, Llc Div Na |
| 481931 | 5/9 Secondary reference Hanwha Aerospace Usa Llc Div Edac Nd, Inc. |
| 481931 | 5/9 Secondary reference Electro-Methods, L.p. |
| 481931 | 5/9 Secondary reference Union Machine Co of Lynn, Inc |
| 481931 | 5/9 Secondary reference Demusz Mfg. Co., Inc. |
| 481931 | 5/9 Secondary reference C&h Hydraulics Inc Dba C & H Hydraulics Inc |
| 481931 | 5/9 Secondary reference Enjet Aero Bloomfield, Llc |
| 481931 | 5/9 Secondary reference C & H Hydraulics, Inc Dba Acme Divac Industries Use CAGE Code 6n016 for Cataloging |
NSN 2915-01-528-8388 is a Boss-Main Grbx, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 2915, Engine Fuel System Components, Aircraft and Missile Prime Movers. Status: active.
NSN 2915-01-528-8388 has 3 manufacturer part numbers on file: 481931 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 481931 (Paramount Machine Company, Inc. Dba Paramount Machine Co Inc), 481931 (Rtx Corporation Div Pratt & Whitney).
Key specifications for 481931: Criticality Code Justification: FEAT; Reference Data and Literature: T.O.2J-TF33-34,F45-I19; Special Features: FIT, TOLERANCE RESTRICTIONS; Part Name Assigned by Controlling Agency: BOSS-MAIN GRBX. 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 2915-01-528-8388 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.