The Washer,key, cataloged under National Stock Number 5310-00-920-5441, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-920-5441 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Internal Straight Key Width | 0.290 INCHES MINIMUM AND 0.300 INCHES MAXIMUM IN |
| Distance From Centerline to Top of Internal Key | 0.910 INCHES MINIMUM AND 0.930 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-P-16232,TYPE Z,CLASS 4 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Distance Including Keys | 2.700 INCHES MINIMUM AND 2.780 INCHES MAXIMUM IN |
| Style Designator | KEY |
| Material Document and Classification | MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 2.530 INCHES MINIMUM AND 2.550 INCHES MAXIMUM IN |
| Material Thickness | 0.046 INCHES MINIMUM AND 0.054 INCHES MAXIMUM IN |
| External Straight Key Width | 0.150 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN |
| External Key Quantity | 4 |
| Surface Treatment | PHOSPHATE OVERALL |
| Material | STEEL COMP 4130 OVERALL |
| Internal Key Quantity | 2 |
| Hole Diameter | 2.220 INCHES MINIMUM AND 2.240 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 |
| Reference | Meaning |
|---|---|
| 114D6094-1 | 5/9 Secondary reference The Boeing Company |
| BACW10BW11 | 3/2 Design control — primary reference U.S. Government activity |
| 114D6094-1 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-00-920-5441 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-920-5441: Internal Straight Key Width: 0.290 INCHES MINIMUM AND 0.300 INCHES MAXIMUM IN; Distance From Centerline to Top of Internal Key: 0.910 INCHES MINIMUM AND 0.930 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-P-16232,TYPE Z,CLASS 4 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Distance Including Keys: 2.700 INCHES MINIMUM AND 2.780 INCHES MAXIMUM IN. 14 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.