The Washer,flat, cataloged under National Stock Number 5310-00-209-4860, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Honeywell Intl Inc Defense Avionics Systems Former Guidance Systems Div. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-00-209-4860 |
| Primary Part Number | 1204358-3 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Honeywell Intl Inc Defense Avionics Systems Former Guidance Systems Div |
| Status | ACTIVE |
| Overall Diameter | 0.187 INCHES NOMINAL IN |
| Hardness Rating | 95.5 ROCKWELL B NOMINAL |
| Material Document and Classification | MIL-S-7720,COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 302 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.093 INCHES NOMINAL IN |
| Thickness | 0.010 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 |
|---|---|
| 1204358-3 PRIMARY | Honeywell Intl Inc Defense Avionics Systems Former Guidance Systems Div (USA) |
| Reference | Meaning |
|---|---|
| 1204358-3 | 5/9 Secondary reference Honeywell Intl Inc Defense Avionics Systems Former Bendix Navigation and Control Systems |
NSN 5310-00-209-4860 is a Washer,flat, manufactured by Honeywell Intl Inc Defense Avionics Systems Former Guidance Systems Div, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-209-4860 has 1 manufacturer part number on file: 1204358-3 (Honeywell Intl Inc Defense Avionics Systems Former Guidance Systems Div).
Key specifications for 1204358-3: Overall Diameter: 0.187 INCHES NOMINAL IN; Hardness Rating: 95.5 ROCKWELL B NOMINAL; Material Document and Classification: MIL-S-7720,COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 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.