The Washer,recessed, cataloged under National Stock Number 5310-00-550-0766, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 8 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-550-0766 |
| Primary Part Number | 6B7769 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Style Designator | RECESSED |
| Material Document and Classification | SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 2.438 INCHES MINIMUM AND 2.439 INCHES MAXIMUM IN |
| Material Thickness | 0.594 INCHES NOMINAL IN |
| Recess Diameter | 1.752 INCHES NOMINAL IN |
| Material | STEEL COMP 1115 OVERALL |
| Hole Diameter | 1.625 INCHES MINIMUM AND 1.628 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 |
|---|---|
| 6B7769 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 5310-00-550-0766 is a Washer,recessed, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-550-0766 has 1 manufacturer part number on file: 6B7769 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 6B7769: Style Designator: RECESSED; Material Document and Classification: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 2.438 INCHES MINIMUM AND 2.439 INCHES MAXIMUM IN; Material Thickness: 0.594 INCHES NOMINAL IN. 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.