The Washer,key, cataloged under National Stock Number 5310-01-180-1738, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Goodrich Corporation. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-180-1738 |
| Primary Part Number | 1881B65 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Goodrich Corporation |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES BOTTOM |
| Surface Finish | 63.0 MICROINCHES TOP |
| Surface Treatment Document and Classification | QQ-P-416 TY 2 CL 1 FED SPEC 1ST TREATMENT RESPONSE AND QQ-C-320 CL 2 FED SPEC 2ND TREATMENT RESPONSE AND MIL-P-23377 MIL SPEC 3RD TREATMENT RESPONSE AND MIL-C-83286 MIL SPEC 4TH TREATMENT RESPONSE OVERALL |
| Criticality Code Justification | FEAT |
| Material Document and Classification | MIL-S-8844 CL 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 5.500 INCHES NOMINAL IN |
| Material Thickness | 0.312 INCHES MINIMUM AND 0.317 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMIUM AND PRIMER AND ENAMEL OVERALL |
| Material | STEEL COMP 4340 OVERALL |
| Internal Key Quantity | 6 |
| Hole Diameter | 4.560 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 | Y |
| Part Number | Manufacturer |
|---|---|
| 1881B65 PRIMARY | Goodrich Corporation (USA) |
| Reference | Meaning |
|---|---|
| 1881B65 | 3/9 Design control — primary reference Goodrich Corporation Div Advanced Structures Landing Systems |
NSN 5310-01-180-1738 is a Washer,key, manufactured by Goodrich Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-180-1738 has 1 manufacturer part number on file: 1881B65 (Goodrich Corporation).
Key specifications for 1881B65: Surface Finish: 63.0 MICROINCHES BOTTOM; Surface Finish: 63.0 MICROINCHES TOP; Surface Treatment Document and Classification: QQ-P-416 TY 2 CL 1 FED SPEC 1ST TREATMENT RESPONSE AND QQ-C-320 CL 2 FED SPEC 2ND TREATMENT RESPONSE AND MIL-P-23377 MIL SPEC 3RD TREATMENT RESPONSE AND MIL-C-83286 MIL SPEC 4TH TREATMENT RESPONSE OVERALL; Criticality Code Justification: FEAT. 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.