The Washer,shouldered and Recessed, cataloged under National Stock Number 5310-01-508-1258, 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 Systems Corp. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-508-1258 |
| Primary Part Number | 6393680-278 |
| Item Name | Washer,shouldered and Recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp |
| Status | ACTIVE |
| Shoulder Height | 0.100 INCHES NOMINAL IN |
| Style Designator | SHOULDERED AND RECESSED |
| Material Document and Classification | MIL-T-9046, CODE AB-2, CONDITION A MIL SPEC 1ST MATERIAL RESPONSE OR ASTM B265, GRADE 23 ASSN STD 2ND MATERIAL RESPONSE OR MIL-T-9047, COMP 6AL-4V, COND A MIL SPEC 3RD MATERIAL RESPONSE OR ASTM B-348, GRADE 23 ASSN STD 4TH MATERIAL RESPONSE OVERALL V |
| Outside Diameter | 1.498 INCHES MINIMUM AND 1.505 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.722 INCHES NOMINAL IN |
| Recess Diameter | 0.738 INCHES NOMINAL IN |
| Material | TITANIUM ALLOY UNS R56401 OVERALL |
| Hole Diameter | 0.404 INCHES MINIMUM AND 0.409 INCHES MAXIMUM IN |
| Recess Angle | 100.0 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 |
|---|---|
| 6393680-278 PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA) |
| Reference | Meaning |
|---|---|
| 6393680-278 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5310-01-508-1258 is a Washer,shouldered and Recessed, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-508-1258 has 1 manufacturer part number on file: 6393680-278 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp).
Key specifications for 6393680-278: Overall Height: 0.170 INCHES NOMINAL IN; Shoulder Height: 0.100 INCHES NOMINAL IN; Style Designator: SHOULDERED AND RECESSED; Material Document and Classification: MIL-T-9046, CODE AB-2, CONDITION A MIL SPEC 1ST MATERIAL RESPONSE OR ASTM B265, GRADE 23 ASSN STD 2ND MATERIAL RESPONSE OR MIL-T-9047, COMP 6AL-4V, COND A MIL SPEC 3RD MATERIAL RESPONSE OR ASTM B-348, GRADE 23 ASSN STD 4TH MATERIAL RESPONSE OVERALL V. 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.