The Washer,keyway, cataloged under National Stock Number 5310-00-779-3361, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Textron Systems Corporation Dba Textron Systems Corp. Government technical data includes 11 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-779-3361 |
| Primary Part Number | 540-011-120-1 |
| Item Name | Washer,keyway |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Textron Systems Corporation Dba Textron Systems Corp |
| Status | ACTIVE |
| External Keyway Width | 0.530 INCHES MINIMUM AND 0.550 INCHES MAXIMUM IN |
| External Keyway Quantity | 1 |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Material Document and Classification | MIL-S-6758,COND D1 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-5621,COND D1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 3.490 INCHES MINIMUM AND 3.510 INCHES MAXIMUM IN |
| Material Thickness | 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Material | STEEL OVERALL |
| Hole Diameter | 2.640 INCHES MINIMUM AND 2.660 INCHES MAXIMUM IN |
| External Keyway Length | 0.255 INCHES MINIMUM AND 0.285 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 |
|---|---|
| 540-011-120-1 | Textron Systems Corporation Dba Textron Systems Corp (USA) |
| Reference | Meaning |
|---|---|
| 540-011-120-1 | 5/9 Secondary reference U.S. Government activity |
| 540-011-120-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-779-3361 is a Washer,keyway, manufactured by Textron Systems Corporation Dba Textron Systems Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-779-3361 has 1 manufacturer part number on file: 540-011-120-1 (Textron Systems Corporation Dba Textron Systems Corp).
Key specifications for 540-011-120-1: External Keyway Width: 0.530 INCHES MINIMUM AND 0.550 INCHES MAXIMUM IN; External Keyway Quantity: 1; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Material Document and Classification: MIL-S-6758,COND D1 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-5621,COND D1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 11 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.