The Washer,saddle, cataloged under National Stock Number 5310-00-418-5367, 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. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-00-418-5367 |
| Primary Part Number | A51C11518-11 |
| Item Name | Washer,saddle |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-A-8625 TY 2,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | SADDLE |
| Material Document and Classification | QQ-225/9 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.200 INCHES NOMINAL IN |
| Thickness at Bolt Hole | 0.200 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE OVERALL |
| Material | ALUMINUM ALLOY 7075 OVERALL |
| Hole Diameter | 0.378 INCHES MINIMUM AND 0.383 INCHES MAXIMUM IN |
| 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 |
|---|---|
| A51C11518-11 | Mercury Tool and Mfg Corp (USA) |
| A51C11518-11 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| A51C11518-11 | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| A51C11518-11 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation |
NSN 5310-00-418-5367 is a Washer,saddle, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-418-5367 has 2 manufacturer part numbers on file: A51C11518-11 (Mercury Tool and Mfg Corp), A51C11518-11 (Northrop Grumman Systems Corporation).
Key specifications for A51C11518-11: Overall Height: 0.320 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-A-8625 TY 2,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Style Designator: SADDLE; Material Document and Classification: QQ-225/9 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.