The Washer,recessed, cataloged under National Stock Number 5310-00-052-1289, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Kitco Llc. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-00-052-1289 |
| Primary Part Number | 2678146 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Kitco Llc |
| Status | ACTIVE |
| Heat Treatment | O-ANNEALED, RECRYSTALLIZED |
| Style Designator | RECESSED |
| Material Document and Classification | QQ-A-250/2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.000 INCHES NOMINAL IN |
| Material Thickness | 0.090 INCHES NOMINAL IN |
| Recess Diameter | 0.602 INCHES MAXIMUM IN |
| Surface Treatment | ANODIZE OVERALL |
| Material | ALUMINUM ALLOY 3003 OVERALL |
| Hole Diameter | 0.529 INCHES MINIMUM AND 0.540 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 |
|---|---|
| 2678146 | Kitco Llc (USA) |
| 2678146 | Associated Aircraft Manufacturing & Sales, Inc. Dba Associated Aircraft Manufacturing & Sales Inc (USA) |
| 2678146 | Derco Aerospace, Inc. Dba Derco Aerospace, Inc. a Lockheed Martin Company (USA) |
| Reference | Meaning |
|---|---|
| 2678146 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-052-1289 is a Washer,recessed, manufactured by Kitco Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-052-1289 has 3 manufacturer part numbers on file: 2678146 (Kitco Llc), 2678146 (Associated Aircraft Manufacturing & Sales, Inc. Dba Associated Aircraft Manufacturing & Sales Inc), 2678146 (Derco Aerospace, Inc. Dba Derco Aerospace, Inc. a Lockheed Martin Company).
Key specifications for 2678146: Heat Treatment: O-ANNEALED, RECRYSTALLIZED; Style Designator: RECESSED; Material Document and Classification: QQ-A-250/2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 1.000 INCHES NOMINAL 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.