The Adapter,orifice Pre, cataloged under National Stock Number 4920-00-944-7753, 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 Kell-Strom Tool International, Inc.. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Adapter,orifice Pre |
| FSC / FSG | 4920 — Aircraft Maintenance and Repair Shop Specialized Equipment (FSG 49) |
| Manufacturers | Kell-Strom Tool International, Inc. (CAGE 75245) |
| Parameter | Value |
|---|---|
| NSN | 4920-00-944-7753 |
| Primary Part Number | 2550109 |
| Item Name | Adapter,orifice Pre |
| FSC / FSG | 4920 / 49 — Aircraft Maintenance and Repair Shop Specialized Equipment |
| Manufacturer | Kell-Strom Tool International, Inc. |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 2550109 REV C | Kell-Strom Tool International, Inc. (USA) |
| 2550109 PRIMARY | Kell-Strom Tool International, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 2550109 | 5/9 Secondary reference Unison Industries Llc |
| 2550109 REV C | 5/9 Secondary reference Unison Industries Llc |
| 2550109C | 5/9 Secondary reference Unison Industries Llc |
NSN 4920-00-944-7753 is a Adapter,orifice Pre, manufactured by Kell-Strom Tool International, Inc., classified under FSC 4920, Aircraft Maintenance and Repair Shop Specialized Equipment. Status: active.
NSN 4920-00-944-7753 has 2 manufacturer part numbers on file: 2550109 REV C (Kell-Strom Tool International, Inc.), 2550109 (Kell-Strom Tool International, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 6620-00-965-8075. Verify interchangeability with system specifications before substitution.
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.