The Washer,key, cataloged under National Stock Number 5310-01-330-9809, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sae International Dba Sae International. Government technical data includes 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-330-9809 |
| Primary Part Number | MS9581-19 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Distance From Centerline to Inside of Prebent Key | 0.150 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN |
| External Prebent Key Length | 0.865 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN |
| Style Designator | 90 DEGREE LOCKING KEY |
| Material Document and Classification | AMS 5510 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.430 INCHES MINIMUM AND 1.440 INCHES MAXIMUM IN |
| External Tapered Key Width | 0.650 INCHES MINIMUM AND 0.660 INCHES MAXIMUM IN |
| Material Thickness | 0.032 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN |
| External Prebent Key Angle | 15.0 DEGREES NOMINAL |
| External Prebent Key Width | 0.290 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN |
| Material | STEEL COMP 321 OVERALL |
| Angle Between External Keys | 88.0 DEGREES MINIMUM AND 92.0 DEGREES MAXIMUM |
| Hole Diameter | 1.015 INCHES MINIMUM AND 1.020 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 |
|---|---|
| MS9581-19 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| MS9581-19 | 3/9 Design control — primary reference U.S. Government activity |
| MS9581-19 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-01-330-9809 is a Washer,key, manufactured by Sae International Dba Sae International, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-330-9809 has 1 manufacturer part number on file: MS9581-19 (Sae International Dba Sae International).
Key specifications for MS9581-19: Distance From Centerline to Inside of Prebent Key: 0.150 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN; External Prebent Key Length: 0.865 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN; Style Designator: 90 DEGREE LOCKING KEY; Material Document and Classification: AMS 5510 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 12 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.