The Washer,recessed, cataloged under National Stock Number 5310-01-178-7420, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Meggitt Aerospace Limited. Government technical data includes 8 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-178-7420 |
| Primary Part Number | AHO88255 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Meggitt Aerospace Limited |
| Status | ACTIVE |
| Style Designator | RECESSED |
| Material Document and Classification | DS186-D87 BS1449-321S12,FSCM K1037 MFR REF SINGLE MATERIAL RESPONSE OR DS186-D87 BS970-321S12,FSCM K1037 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.875 INCHES NOMINAL IN |
| Material Thickness | 0.026 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN |
| Recess Diameter | 0.520 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN |
| Material | STEEL OVERALL |
| Hole Diameter | 0.490 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Recess Angle | 90.0 DEGREES NOMINAL |
| 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 |
|---|---|
| AHO88255 PRIMARY | Meggitt Aerospace Limited (GBR) |
NSN 5310-01-178-7420 is a Washer,recessed, manufactured by Meggitt Aerospace Limited, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-178-7420 has 1 manufacturer part number on file: AHO88255 (Meggitt Aerospace Limited).
Key specifications for AHO88255: Style Designator: RECESSED; Material Document and Classification: DS186-D87 BS1449-321S12,FSCM K1037 MFR REF SINGLE MATERIAL RESPONSE OR DS186-D87 BS970-321S12,FSCM K1037 MFR REF SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.875 INCHES NOMINAL IN; Material Thickness: 0.026 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN. 8 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.