The Washer,recessed, cataloged under National Stock Number 5310-00-941-3778, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-941-3778 |
| Primary Part Number | 515678 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES BOTTOM |
| Surface Finish | 63.0 MICROINCHES TOP |
| Style Designator | RECESSED |
| Material Document and Classification | AMS 5613 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.370 INCHES MINIMUM AND 1.380 INCHES MAXIMUM IN |
| Material Thickness | 0.093 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN |
| Recess Diameter | 0.677 INCHES MINIMUM AND 0.697 INCHES MAXIMUM IN |
| Material | STEEL COMP 410 OVERALL |
| Hole Diameter | 0.438 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN |
| Recess Angle | 88.0 DEGREES MINIMUM AND 92.0 DEGREES MAXIMUM |
| 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 |
|---|---|
| 515678 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 515678 | 5/9 Secondary reference Royal Oak Gage, Inc |
| 515678 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
NSN 5310-00-941-3778 is a Washer,recessed, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-941-3778 has 1 manufacturer part number on file: 515678 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 515678: Surface Finish: 63.0 MICROINCHES BOTTOM; Surface Finish: 63.0 MICROINCHES TOP; Style Designator: RECESSED; Material Document and Classification: AMS 5613 ASSN STD 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.