The Washer,recessed, cataloged under National Stock Number 5310-01-160-5729, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation Dba Electronic Systems. Government technical data includes 9 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 | 5310-01-160-5729 |
| Primary Part Number | 3558B08H01 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation Dba Electronic Systems |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-5541,CLASS 1A MIL SPEC SINGLE TREATMENT RESPONSE OVERALL A |
| Style Designator | RECESSED |
| Material Document and Classification | QQ-A-225/3,T3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.875 INCHES NOMINAL IN |
| Material Thickness | 0.185 INCHES MINIMUM AND 0.195 INCHES MAXIMUM IN |
| Recess Diameter | 0.435 INCHES MINIMUM AND 0.444 INCHES MAXIMUM IN |
| Surface Treatment | CHROMATE OVERALL |
| Material | ALUMINUM ALLOY 2011 OVERALL |
| Recess Angle | 82.0 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 |
|---|---|
| 3558B08H01 PRIMARY | Northrop Grumman Systems Corporation Dba Electronic Systems (USA) |
NSN 5310-01-160-5729 is a Washer,recessed, manufactured by Northrop Grumman Systems Corporation Dba Electronic Systems, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-160-5729 has 1 manufacturer part number on file: 3558B08H01 (Northrop Grumman Systems Corporation Dba Electronic Systems).
Key specifications for 3558B08H01: Surface Treatment Document and Classification: MIL-C-5541,CLASS 1A MIL SPEC SINGLE TREATMENT RESPONSE OVERALL A; Style Designator: RECESSED; Material Document and Classification: QQ-A-225/3,T3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.875 INCHES NOMINAL IN. 9 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.