The Washer,keyway, cataloged under National Stock Number 5310-01-295-4765, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Optex Systems, Inc Div Applied Optics Center. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-295-4765 |
| Primary Part Number | 26800313 |
| Item Name | Washer,keyway |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Optex Systems, Inc Div Applied Optics Center |
| Status | ACTIVE |
| Distance From Centerline to Bottom of Internal Keyway | 0.640 INCHES NOMINAL IN |
| Internal Keyway Width | 0.502 INCHES MINIMUM AND 0.504 INCHES MAXIMUM IN |
| Surface Finish | 32.0 MICROINCHES BOTTOM |
| Surface Finish | 32.0 MICROINCHES TOP |
| Surface Treatment Document and Classification | ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Material Document and Classification | QQ-S-763,COND A FED SPEC ALL MATERIAL RESPONSES OVERALL |
| Outside Diameter | 2.000 INCHES NOMINAL IN |
| Internal Keyway Quantity | 2 |
| Material Thickness | 0.150 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 302 OR STEEL COMP 304 OVERALL |
| Hole Diameter | 0.752 INCHES MINIMUM AND 0.754 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 |
|---|---|
| 26800313 PRIMARY | Optex Systems, Inc Div Applied Optics Center (USA) |
| 9240-004-14 | Naval Sea Systems Command Logistics Support Engineering Activity (USA) |
| Reference | Meaning |
|---|---|
| 26800313 | 5/9 Secondary reference L3 Technologies, Inc. Dba Insight Technology Division Div Insight Technology Division |
NSN 5310-01-295-4765 is a Washer,keyway, manufactured by Optex Systems, Inc Div Applied Optics Center, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-295-4765 has 2 manufacturer part numbers on file: 26800313 (Optex Systems, Inc Div Applied Optics Center), 9240-004-14 (Naval Sea Systems Command Logistics Support Engineering Activity).
Key specifications for 26800313: Distance From Centerline to Bottom of Internal Keyway: 0.640 INCHES NOMINAL IN; Internal Keyway Width: 0.502 INCHES MINIMUM AND 0.504 INCHES MAXIMUM IN; Surface Finish: 32.0 MICROINCHES BOTTOM; Surface Finish: 32.0 MICROINCHES TOP. 12 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.