The Shoe,piston Nozzle, cataloged under National Stock Number 4320-00-944-0504, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Ontic Engineering & Manufacturing, Inc Dba Ontic Us. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 4320-00-944-0504 |
| Primary Part Number | 648549 |
| Item Name | Shoe,piston Nozzle |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Ontic Engineering & Manufacturing, Inc Dba Ontic Us |
| Status | ACTIVE |
| General Characteristics Item Description | NITRALLOY,SILVERPLATED,0.395 TO 0.401 IN. LG,0.685 TO 0.689 IN. OD 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 |
|---|---|
| 648549 | Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA) |
| Reference | Meaning |
|---|---|
| 648549 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4320-00-944-0504 is a Shoe,piston Nozzle, manufactured by Ontic Engineering & Manufacturing, Inc Dba Ontic Us, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-944-0504 has 1 manufacturer part number on file: 648549 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us).
1 possible match (shared part number, not a government interchangeability claim): 2530-01-497-8986. Verify interchangeability with system specifications before substitution.
Key specifications for 648549: General Characteristics Item Description: NITRALLOY,SILVERPLATED,0.395 TO 0.401 IN. LG,0.685 TO 0.689 IN. OD IN; End Item Identification: 4320001777038 34E56&17J PUMP,AXIAL PISTONS. 1 specification is 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.