The Washer,key, cataloged under National Stock Number 5310-01-175-6077, 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 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-175-6077 |
| Primary Part Number | 1881-128 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Goodrich Corporation |
| Status | ACTIVE |
| Internal Straight Key Width | 0.495 INCHES MINIMUM AND 0.498 INCHES MAXIMUM IN |
| Distance From Centerline to Top of Internal Key | 1.571 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MIL-P-23377 MIL SPEC 1ST TREATMENT RESPONSE AND FED-STD-595 COLOR 17875 FED STD 2ND TREATMENT RESPONSE AND QQ-C-320 FED SPEC 3RD TREATMENT RESPONSE AND CPC 8225,13002 MFR REF 4TH TREATMENT RESPONSE OVERALL |
| Style Designator | KEY |
| Material Document and Classification | MIL-S-8844 CL 3 MIL SPEC ALL MATERIAL RESPONSES OVERALL |
| Outside Diameter | 4.120 INCHES NOMINAL IN |
| Material Thickness | 0.500 INCHES NOMINAL IN |
| Material | STEEL UNS K44220 OR STEEL UNS K44315 OVERALL |
| Internal Key Quantity | 2 |
| Hole Diameter | 3.590 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 |
NSN 5310-01-175-6077 is a Washer,key, manufactured by Goodrich Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-175-6077 has 2 manufacturer part numbers on file: 1881-128 (Goodrich Corporation), 1881-128 (Heroux-Devtek Inc).
Key specifications for 1881-128: Internal Straight Key Width: 0.495 INCHES MINIMUM AND 0.498 INCHES MAXIMUM IN; Distance From Centerline to Top of Internal Key: 1.571 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-P-23377 MIL SPEC 1ST TREATMENT RESPONSE AND FED-STD-595 COLOR 17875 FED STD 2ND TREATMENT RESPONSE AND QQ-C-320 FED SPEC 3RD TREATMENT RESPONSE AND CPC 8225,13002 MFR REF 4TH TREATMENT RESPONSE OVERALL; Style Designator: KEY. 10 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.