The Washer,lock, cataloged under National Stock Number 5310-00-420-2898, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Div Rms. Government technical data includes 6 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-420-2898 |
| Primary Part Number | N407P43 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| Hardness Rating | 90.0 ROCKWELL B MINIMUM |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Outside Diameter | 0.688 INCHES NOMINAL IN |
| Material Thickness | 0.094 INCHES NOMINAL IN |
| Nondefinitive Spec/std Data | E CLASS AND 2 STYLE |
| Hole Diameter | 0.382 INCHES MINIMUM AND 0.398 INCHES MAXIMUM 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 |
|---|---|
| 3003918 | International Business Machines Corp Parts Order Center Dept E - 54 (USA) |
| N407P43 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| 49522-5-3101 PRIMARY | Itt Goulds Pumps, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 3003918 | 5/9 Secondary reference International Business Machines Corporation Dba IBM |
| N407P43 | 5/9 Secondary reference General Electric Company |
| 3003918 | 5/9 Secondary reference International Business Machines Corp |
NSN 5310-00-420-2898 is a Washer,lock, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-420-2898 has 3 manufacturer part numbers on file: 3003918 (International Business Machines Corp Parts Order Center Dept E - 54), N407P43 (Lockheed Martin Corporation Div Rms), 49522-5-3101 (Itt Goulds Pumps, Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 2915-01-239-5570, 2920-01-490-0422. Verify interchangeability with system specifications before substitution.
Key specifications for N407P43: Hardness Rating: 90.0 ROCKWELL B MINIMUM; Style Designator: SPLIT HELICAL-RIGHT HAND; Outside Diameter: 0.688 INCHES NOMINAL IN; Material Thickness: 0.094 INCHES NOMINAL IN. 6 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.