The Washer,flat, cataloged under National Stock Number 5310-01-210-4874, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Pentair Flow Technologies, Llc. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Washer,flat |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | Pentair Flow Technologies, Llc (CAGE 6GSK8); Pump Systems Llc (CAGE 7RC44) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-210-4874 |
| Primary Part Number | 05570051 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Pentair Flow Technologies, Llc |
| 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 |
|---|---|
| 05570051 PRIMARY | Pentair Flow Technologies, Llc (USA) |
| 055700051 PRIMARY | Pentair Flow Technologies, Llc (USA) |
| 055700051 | Pump Systems Llc (USA) |
| 05570051 | Pump Systems Llc (USA) |
| Reference | Meaning |
|---|---|
| 5570-000-1 | 5/9 Secondary reference Marley Pump Co Hydromatic Pumps |
| 5570-000-5 | 3/9 Design control — primary reference Marley Pump Co Hydromatic Pumps |
NSN 5310-01-210-4874 is a Washer,flat, manufactured by Pentair Flow Technologies, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-210-4874 has 4 manufacturer part numbers on file: 05570051 (Pentair Flow Technologies, Llc), 055700051 (Pentair Flow Technologies, Llc), 055700051 (Pump Systems Llc), 05570051 (Pump Systems Llc).
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.