The Washer,recessed, cataloged under National Stock Number 5310-01-111-5957, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Commercial. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-111-5957 |
| Primary Part Number | 6-55097-16 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Commercial |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES INNER |
| Surface Finish | 63.0 MICROINCHES COUNTERBORE WALL |
| Style Designator | RECESSED |
| Material Document and Classification | MIL-S-5626,COND D MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049,COND D MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-5000,COND D MIL SPEC 3RD MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.600 INCHES MINIMUM AND 1.620 INCHES MAXIMUM IN |
| Material Thickness | 0.280 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN |
| Recess Diameter | 1.080 INCHES MINIMUM AND 1.086 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 150000 POUNDS PER SQUARE INCH LBS |
| Material | STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP E4340 OVERALL |
| Hole Diameter | 0.875 INCHES MINIMUM AND 0.882 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 |
|---|---|
| 6-55097-16 PRIMARY | The Boeing Company Div Commercial (USA) |
| Reference | Meaning |
|---|---|
| 6-55097-16 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-01-111-5957 is a Washer,recessed, manufactured by The Boeing Company Div Commercial, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-111-5957 has 1 manufacturer part number on file: 6-55097-16 (The Boeing Company Div Commercial).
Key specifications for 6-55097-16: Surface Finish: 63.0 MICROINCHES INNER; Surface Finish: 63.0 MICROINCHES COUNTERBORE WALL; Style Designator: RECESSED; Material Document and Classification: MIL-S-5626,COND D MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049,COND D MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-5000,COND D MIL SPEC 3RD MATERIAL RESPONSE OVERALL. 11 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.