The Washer,shouldered, cataloged under National Stock Number 5310-00-209-5984, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-209-5984 |
| Primary Part Number | 234840 |
| Item Name | Washer,shouldered |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Shoulder Height | 0.055 INCHES MINIMUM AND 0.059 INCHES MAXIMUM IN |
| Hardness Rating | 25.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM |
| Style Designator | SHOULDERED |
| Material Document and Classification | QQ-A-354 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.540 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN |
| Material Thickness | 0.053 INCHES NOMINAL IN |
| Shoulder Diameter | 0.295 INCHES MINIMUM AND 0.309 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | ALUMINUM ALLOY OVERALL |
| Hole Diameter | 0.190 INCHES MINIMUM AND 0.195 INCHES MAXIMUM 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 |
|---|---|
| 234840 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 234840 | 5/9 Secondary reference Royal Oak Gage, Inc |
NSN 5310-00-209-5984 is a Washer,shouldered, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-209-5984 has 1 manufacturer part number on file: 234840 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
1 possible match (shared part number, not a government interchangeability claim): 6605-00-474-5580. Verify interchangeability with system specifications before substitution.
Key specifications for 234840: Shoulder Height: 0.055 INCHES MINIMUM AND 0.059 INCHES MAXIMUM IN; Hardness Rating: 25.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM; Style Designator: SHOULDERED; Material Document and Classification: QQ-A-354 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.