The Washer,key, cataloged under National Stock Number 5310-00-955-9518, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-955-9518 |
| 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 | 2.042 INCHES MINIMUM AND 2.052 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 | 5.020 INCHES MINIMUM AND 5.040 INCHES MAXIMUM IN |
| Style Designator | KEY |
| Material Document and Classification | MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 4.790 INCHES MINIMUM AND 4.810 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 |
| Test Data Document | 77272-BAC5424 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.). |
| Material | STEEL OVERALL |
| Internal Key Quantity | 2 |
| Hole Diameter | 4.380 INCHES MINIMUM AND 4.400 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 |
|---|---|
| 114D1109-1 | 5/9 Secondary reference The Boeing Company |
| BACW10BW34 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-955-9518 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-955-9518: Internal Straight Key Width: 0.290 INCHES MINIMUM AND 0.300 INCHES MAXIMUM IN; Distance From Centerline to Top of Internal Key: 2.042 INCHES MINIMUM AND 2.052 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: 5.020 INCHES MINIMUM AND 5.040 INCHES MAXIMUM IN. 15 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.