The Washer,flat, cataloged under National Stock Number 5310-01-467-2131, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division. Government technical data includes 7 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-467-2131 |
| Primary Part Number | 345-02016 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division |
| Status | ACTIVE |
| Overall Diameter | 0.561 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL CORROSION RESISTING OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.250 INCHES NOMINAL IN |
| Thickness | 0.062 INCHES NOMINAL 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 |
|---|---|
| 345-02016 PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division (USA) |
| PL-M19-21121-D PC 161 | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division (USA) |
| M19-21121-D PC 161 | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division (USA) |
| Reference | Meaning |
|---|---|
| M19-20873 PC NO 308 | C/1 Advisory reference — outside the item-of-supply concept Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division |
| M19-21121 | D/9 Drawing number reference only Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division |
| B18.22.1 | 5/1 Secondary reference U.S. Government activity |
NSN 5310-01-467-2131 is a Washer,flat, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-467-2131 has 3 manufacturer part numbers on file: 345-02016 (Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division), PL-M19-21121-D PC 161 (Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division), M19-21121-D PC 161 (Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division).
6 possible matches (shared part number, not a government interchangeability claim): 5310-01-467-2139, 5310-01-467-2420, 5310-01-467-2422. Verify interchangeability with system specifications before substitution.
Key specifications for 345-02016: Overall Diameter: 0.561 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; End Item Identification: TRANS:WSD;NIMITZ CLASS CVN. 7 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.
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.