The Washer,recessed, cataloged under National Stock Number 5310-00-209-2702, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Emerson Electric Co Alco Controls Div. Government technical data includes 10 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 | 5310-00-209-2702 |
| Primary Part Number | W6581 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Emerson Electric Co Alco Controls Div |
| Status | ACTIVE |
| Style Designator | RECESSED |
| Material Document and Classification | AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.278 INCHES MINIMUM AND 0.284 INCHES MAXIMUM IN |
| Recess Depth | 0.003 INCHES MINIMUM AND 0.013 INCHES MAXIMUM IN |
| Material Thickness | 0.018 INCHES MINIMUM AND 0.022 INCHES MAXIMUM IN |
| Recess Diameter | 0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 304 OVERALL |
| Hole Diameter | 0.126 INCHES MINIMUM AND 0.129 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 |
|---|---|
| W6581 PRIMARY | Emerson Electric Co Alco Controls Div (USA) |
NSN 5310-00-209-2702 is a Washer,recessed, manufactured by Emerson Electric Co Alco Controls Div, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-209-2702 has 1 manufacturer part number on file: W6581 (Emerson Electric Co Alco Controls Div).
Key specifications for W6581: Style Designator: RECESSED; Material Document and Classification: AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.278 INCHES MINIMUM AND 0.284 INCHES MAXIMUM IN; Recess Depth: 0.003 INCHES MINIMUM AND 0.013 INCHES MAXIMUM 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.