The Washer,recessed, cataloged under National Stock Number 5310-01-349-9651, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Moeller Manufacturing & Supply, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-349-9651 |
| Primary Part Number | MM891C6A |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Moeller Manufacturing & Supply, Llc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-83488,TY 2,CL 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | RECESSED |
| Material Document and Classification | AMS 5596 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5597 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.691 INCHES MINIMUM AND 0.701 INCHES MAXIMUM IN |
| Material Thickness | 0.071 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN |
| Recess Diameter | 0.465 INCHES MINIMUM AND 0.475 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM ALLOY OVERALL |
| Material | NICKEL ALLOY 718 OVERALL |
| Hole Diameter | 0.376 INCHES MINIMUM AND 0.380 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 |
|---|---|
| MM891C6A | Moeller Manufacturing & Supply, Llc (USA) |
| 03A280C6A | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| 03A280C6A | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems (USA) |
| AS32990C6A | Anillo Industries Llc (USA) |
| Reference | Meaning |
|---|---|
| NS202859C6A | 5/2 Secondary reference U.S. Government activity |
| VN948YNP6CA | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-349-9651 is a Washer,recessed, manufactured by Moeller Manufacturing & Supply, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-349-9651 has 4 manufacturer part numbers on file: MM891C6A (Moeller Manufacturing & Supply, Llc), 03A280C6A (Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems), 03A280C6A (Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems), AS32990C6A (Anillo Industries Llc).
Key specifications for MM891C6A: Surface Treatment Document and Classification: MIL-C-83488,TY 2,CL 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Style Designator: RECESSED; Material Document and Classification: AMS 5596 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5597 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.691 INCHES MINIMUM AND 0.701 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.