The Washer,recessed, cataloged under National Stock Number 5310-01-304-8738, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Anillo Industries Llc. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-304-8738 |
| Primary Part Number | AS19879C7A |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Anillo Industries Llc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | NAS 4006 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | RECESSED |
| Material Document and Classification | AMS 5525 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5737 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5596 ASSN STD 2ND MATERIAL RESPONSE OR AMS 5597 ASSN STD 2ND MATERIAL RESPONSE OR AMS 5662 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.807 INCHES MINIMUM AND 0.817 INCHES MAXIMUM IN |
| Material Thickness | 0.071 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN |
| Recess Diameter | 0.539 INCHES MINIMUM AND 0.549 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM ALLOY OVERALL |
| Material | IRON ALLOY 660 OR NICKEL ALLOY 502 OVERALL |
| Hole Diameter | 0.439 INCHES MINIMUM AND 0.443 INCHES MAXIMUM IN |
| Recess Angle | 80.0 DEGREES MINIMUM AND 100.0 DEGREES MAXIMUM |
| 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 |
|---|---|
| 03A257C7A | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems (USA) |
| AS19879C7A PRIMARY | Anillo Industries Llc (USA) |
| 03A257C7A | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| MM118C7A | Moeller Manufacturing & Supply, Llc (USA) |
| Reference | Meaning |
|---|---|
| NS202860C7A | 5/2 Secondary reference U.S. Government activity |
| VN948BF7C | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-304-8738 is a Washer,recessed, manufactured by Anillo Industries Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-304-8738 has 4 manufacturer part numbers on file: 03A257C7A (Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems), AS19879C7A (Anillo Industries Llc), 03A257C7A (Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems), MM118C7A (Moeller Manufacturing & Supply, Llc).
Key specifications for AS19879C7A: Surface Treatment Document and Classification: NAS 4006 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Style Designator: RECESSED; Material Document and Classification: AMS 5525 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5737 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5596 ASSN STD 2ND MATERIAL RESPONSE OR AMS 5597 ASSN STD 2ND MATERIAL RESPONSE OR AMS 5662 ASSN STD 2ND MATERIAL RESPONSE OVERALL; Outside Diameter: 0.807 INCHES MINIMUM AND 0.817 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.