The Washer,flat, cataloged under National Stock Number 5310-01-623-6933, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 5310-01-623-6933 |
| Primary Part Number | PSSSN21C-306/1-007L1 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FRO LEVEL 1 ITEMS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| PSSSN21C-306/1-007L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 7491198 PART NO. 12L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| PSSSN21C-306/1-007 | 3/1 Design control — primary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 7491198 PART NO. 12 | 5/1 Secondary reference Naval Sea Systems Command |
NSN 5310-01-623-6933 is a Washer,flat, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-623-6933 has 2 manufacturer part numbers on file: PSSSN21C-306/1-007L1 (Naval Inventory Control Point Mechanicsburg), 7491198 PART NO. 12L1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for PSSSN21C-306/1-007L1: Criticality Code Justification: ZZZY; Part Name Assigned by Controlling Agency: WASHER; End Item Identification: HULL PENETRATOR; Reference Number Differentiating Characteristics: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FRO LEVEL 1 ITEMS. 2 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.