The Washer,keyway, cataloged under National Stock Number 5310-00-102-4660, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions. Government technical data includes 7 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-102-4660 |
| Primary Part Number | 4855B |
| Item Name | Washer,keyway |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| Status | ACTIVE |
| External Keyway Width | 0.062 INCHES NOMINAL IN |
| External Keyway Quantity | 8 |
| Outside Diameter | 2.272 INCHES NOMINAL IN |
| Material Thickness | 0.063 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Hole Diameter | 1.185 INCHES NOMINAL IN |
| External Keyway Length | 0.250 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 |
|---|---|
| 4855B PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| 158572-904 | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| 4855B | 3/9 Design control — primary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 158572-904 | 5/9 Secondary reference U.S. Government activity |
| 158572-904 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 158572-904 | 5/9 Secondary reference U.S. Government activity |
| 4855B | 5/9 Secondary reference U.S. Government activity |
| 4855B | 5/9 Secondary reference U.S. Government activity |
NSN 5310-00-102-4660 is a Washer,keyway, manufactured by Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-102-4660 has 2 manufacturer part numbers on file: 4855B (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions), 158572-904 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions).
1 possible match (shared part number, not a government interchangeability claim): 5342-00-992-3183. Verify interchangeability with system specifications before substitution.
Key specifications for 4855B: External Keyway Width: 0.062 INCHES NOMINAL IN; External Keyway Quantity: 8; Outside Diameter: 2.272 INCHES NOMINAL IN; Material Thickness: 0.063 INCHES NOMINAL IN. 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.