The Washer,flat, cataloged under National Stock Number 5310-00-759-9997, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-759-9997 |
| Primary Part Number | 7599997 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate |
| Status | ACTIVE |
| Overall Diameter | 0.562 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-S-698,TEMPER 1 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-S-698,TEMPER 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | ZINC OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.258 INCHES MINIMUM AND 0.268 INCHES MAXIMUM IN |
| Thickness | 0.063 INCHES NOMINAL 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 |
|---|---|
| 7599997 PRIMARY | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA) |
| 284157 | Telemechanics Inc (USA) |
| Reference | Meaning |
|---|---|
| 284157 | 5/9 Secondary reference Lucent Technologies Inc Dba Federal Marketing Group |
| 284157 | 5/9 Secondary reference American Telephone and Telegraph Co |
| 284157 | C/1 Advisory reference — outside the item-of-supply concept Lucent Technologies Inc Corporate Headquarters |
| 284157 | 5/9 Secondary reference At and T Corp |
NSN 5310-00-759-9997 is a Washer,flat, manufactured by Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-759-9997 has 2 manufacturer part numbers on file: 7599997 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate), 284157 (Telemechanics Inc).
1 possible match (shared part number, not a government interchangeability claim): 6750-01-427-3003. Verify interchangeability with system specifications before substitution.
Key specifications for 7599997: Overall Diameter: 0.562 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN; Material Document and Classification: QQ-S-698,TEMPER 1 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-S-698,TEMPER 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: ZINC OVERALL. 9 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.