The Washer,recessed, cataloged under National Stock Number 5310-01-023-6490, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sealcraft Corporation. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-023-6490 |
| Primary Part Number | 530741 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sealcraft Corporation |
| Status | ACTIVE |
| Style Designator | RECESSED |
| Material Document and Classification | AISI,C1020 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.560 INCHES NOMINAL IN |
| Recess Depth | 0.190 INCHES NOMINAL IN |
| Features Provided | MAGNETIZED |
| Material Thickness | 0.090 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.3906 INCHES NOMINAL 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 |
|---|---|
| 530741 PRIMARY | Sealcraft Corporation (USA) |
| Reference | Meaning |
|---|---|
| 530741 | 5/9 Secondary reference Continental Aerospace Technologies, Inc. |
| 530741 | 5/9 Secondary reference Teledyne Industries Inc Teledyne Power Systems Div |
NSN 5310-01-023-6490 is a Washer,recessed, manufactured by Sealcraft Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-023-6490 has 1 manufacturer part number on file: 530741 (Sealcraft Corporation).
Key specifications for 530741: Overall Height: 0.280 INCHES NOMINAL IN; Style Designator: RECESSED; Material Document and Classification: AISI,C1020 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 1.560 INCHES NOMINAL IN. 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.