The Washer,recessed, cataloged under National Stock Number 5310-01-391-9112, 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 Northrop Grumman Is Div Northrop Grumman Aeronautics Systems. Government technical data includes 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-391-9112 |
| Primary Part Number | 03A377F8 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-26074, CL2, GRB MIL SPEC SINGLE TREATMENT RESPONSE BODY |
| Material Document and Classification | MIL-R-25988 MIL SPEC SINGLE MATERIAL RESPONSE SEALING ELEMENT |
| Material Document and Classification | MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE BODY |
| Outside Diameter | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Material Thickness | 0.090 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN |
| Surface Treatment | NICKEL BODY |
| Material | STEEL COMP 4130 BODY |
| Material | RUBBER FLUOROSILICONE CLASS FQ SEALING ELEMENT |
| Hole Diameter | 0.238 INCHES MINIMUM AND 0.242 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 |
|---|---|
| 03A377F8 PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| Reference | Meaning |
|---|---|
| 888333-8 | 5/9 Secondary reference U.S. Government activity |
| 888333 1/4 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-391-9112 is a Washer,recessed, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-391-9112 has 1 manufacturer part number on file: 03A377F8 (Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems).
Key specifications for 03A377F8: Surface Treatment Document and Classification: MIL-C-26074, CL2, GRB MIL SPEC SINGLE TREATMENT RESPONSE BODY; Material Document and Classification: MIL-R-25988 MIL SPEC SINGLE MATERIAL RESPONSE SEALING ELEMENT; Material Document and Classification: MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE BODY; Outside Diameter: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN. 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.