The Ring,back Up, cataloged under National Stock Number 4320-00-883-0500, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Brand Hydraulics. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Ring,back Up |
| FSC / FSG | 4320 — Power and Hand Pumps (FSG 43) |
| Manufacturers | Brand Hydraulics (CAGE 19184) |
| Parameter | Value |
|---|---|
| NSN | 4320-00-883-0500 |
| Primary Part Number | HP55 |
| Item Name | Ring,back Up |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Brand Hydraulics |
| 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 |
|---|---|
| HP55 PRIMARY | Brand Hydraulics (USA) |
NSN 4320-00-883-0500 is a Ring,back Up, manufactured by Brand Hydraulics, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-883-0500 has 1 manufacturer part number on file: HP55 (Brand Hydraulics).
2 possible matches (shared part number, not a government interchangeability claim): 7420-01-005-8543, 4320-01-573-0118. 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.