The Washer,key, cataloged under National Stock Number 5310-00-970-9905, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-970-9905 |
| Primary Part Number | 128H10134-11 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Wire Hole Diameter | 0.071 INCHES NOMINAL IN |
| Internal Prebent Key Width | 0.210 INCHES NOMINAL IN |
| Heat Treatment | COLD DRAWN 1/2 HARD CONDITION |
| Style Designator | INTERNAL PREBENT KEY |
| Material Document and Classification | MIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 3.410 INCHES NOMINAL IN |
| Material Thickness | 0.094 INCHES NOMINAL IN |
| Material | STEEL COMP 301 OVERALL |
| Hole Diameter | 1.745 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 |
|---|---|
| 128H10134-11 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 128H10134-11 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 5310-00-970-9905 is a Washer,key, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-970-9905 has 1 manufacturer part number on file: 128H10134-11 (Northrop Grumman Systems Corporation).
Key specifications for 128H10134-11: Wire Hole Diameter: 0.071 INCHES NOMINAL IN; Internal Prebent Key Width: 0.210 INCHES NOMINAL IN; Heat Treatment: COLD DRAWN 1/2 HARD CONDITION; Style Designator: INTERNAL PREBENT KEY. 9 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.