The Washer,lock, cataloged under National Stock Number 5310-00-184-8978, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-184-8978 |
| Primary Part Number | 310-0078-000 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
| Status | ACTIVE |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Outside Diameter | 0.239 INCHES NOMINAL IN |
| Material Thickness | 0.025 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN |
| Departure From Cited Designator | AS MODIFIED BY MATERIAL SPEC |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Material | COPPER ALLOY OVERALL |
| Hole Diameter | 0.141 INCHES MINIMUM AND 0.151 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 |
|---|---|
| 310-0078-000 PRIMARY | Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA) |
| 12Z22PC273 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| 900873-05 | Northrop Grumman Systems Corporation (USA) |
| AN935B6L | Entrak Gmbh (DEU) |
| Reference | Meaning |
|---|---|
| 900873-05 | 5/9 Secondary reference U.S. Government activity |
| 310-0078-000 | 5/9 Secondary reference Wrought Washer Mfg., Inc. |
| AN935B6L | 4/1 Identification reference U.S. Government activity |
| 6026-1085-6 | 5/9 Secondary reference Raytheon Technical Services Company |
NSN 5310-00-184-8978 is a Washer,lock, manufactured by Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-184-8978 has 4 manufacturer part numbers on file: 310-0078-000 (Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems), 12Z22PC273 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 900873-05 (Northrop Grumman Systems Corporation), AN935B6L (Entrak Gmbh).
1 possible match (shared part number, not a government interchangeability claim): 5310-00-982-6509. Verify interchangeability with system specifications before substitution.
Key specifications for 310-0078-000: Style Designator: SPLIT HELICAL-RIGHT HAND; Outside Diameter: 0.239 INCHES NOMINAL IN; Material Thickness: 0.025 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN; Departure From Cited Designator: AS MODIFIED BY MATERIAL SPEC. 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.