The Washer,flat, cataloged under National Stock Number 5310-00-560-2104, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is International Business Machines Corp Parts Order Center Dept E - 54. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-560-2104 |
| Primary Part Number | 1091207 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | International Business Machines Corp Parts Order Center Dept E - 54 |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416,TYPE II,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.339 INCHES MINIMUM AND 0.349 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | CADMIUM OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 1020 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.183 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN |
| Thickness | 0.024 INCHES MINIMUM AND 0.026 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 |
|---|---|
| 1091207 PRIMARY | International Business Machines Corp Parts Order Center Dept E - 54 (USA) |
| Reference | Meaning |
|---|---|
| 1091207 | 5/9 Secondary reference International Business Machines Corporation Dba IBM |
| 10167852 | 7/2 Vendor item drawing reference Us Army Aviation and Missile Command |
NSN 5310-00-560-2104 is a Washer,flat, manufactured by International Business Machines Corp Parts Order Center Dept E - 54, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-560-2104 has 1 manufacturer part number on file: 1091207 (International Business Machines Corp Parts Order Center Dept E - 54).
1 possible match (shared part number, not a government interchangeability claim): 3020-01-040-1118. Verify interchangeability with system specifications before substitution.
Key specifications for 1091207: Surface Treatment Document and Classification: QQ-P-416,TYPE II,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 0.339 INCHES MINIMUM AND 0.349 INCHES MAXIMUM IN; Material Document and Classification: QQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 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.