The Washer,keyway, cataloged under National Stock Number 5310-00-596-4572, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sundstrand Corp. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-596-4572 |
| Primary Part Number | 115421 |
| Item Name | Washer,keyway |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sundstrand Corp |
| Status | ACTIVE |
| External Keyway Width | 0.250 INCHES NOMINAL IN |
| External Keyway Quantity | 4 |
| Material Document and Classification | SAE ASSN STD ALL MATERIAL RESPONSES OR SAE 1014 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.875 INCHES NOMINAL IN |
| Material Thickness | 0.468 INCHES NOMINAL IN |
| Material | STEEL COMP 1010 OR STEEL COMP 1012 OR STEEL OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1020 OVERALL |
| Hole Diameter | 0.437 INCHES NOMINAL IN |
| External Keyway Length | 0.125 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 |
|---|---|
| 115421 PRIMARY | Sundstrand Corp (USA) |
| Reference | Meaning |
|---|---|
| 115421 | 3/9 Design control — primary reference Suntec Industries Inc Del Dba Suntec |
| 115421 | 5/9 Secondary reference U.S. Government activity |
| 115421 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-00-596-4572 is a Washer,keyway, manufactured by Sundstrand Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-596-4572 has 1 manufacturer part number on file: 115421 (Sundstrand Corp).
2 possible matches (shared part number, not a government interchangeability claim): 5935-00-958-5699, 1680-01-032-5201. Verify interchangeability with system specifications before substitution.
Key specifications for 115421: External Keyway Width: 0.250 INCHES NOMINAL IN; External Keyway Quantity: 4; Material Document and Classification: SAE ASSN STD ALL MATERIAL RESPONSES OR SAE 1014 ASSN STD 2ND MATERIAL RESPONSE OVERALL; Outside Diameter: 0.875 INCHES NOMINAL IN. 8 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.