The Washer,flat, cataloged under National Stock Number 5310-01-666-3303, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-666-3303 |
| Primary Part Number | 12605209-032 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Overall Diameter | 1.993 INCHES MINIMUM AND 2.030 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Color | BLACK OVERALL |
| Surface Treatment | PHOSPHATE AND ZINC OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 1.055 INCHES MINIMUM AND 1.092 INCHES MAXIMUM IN |
| Thickness | 0.108 INCHES MINIMUM AND 0.160 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 |
|---|---|
| 12605209-032 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 4033259032 | Oshkosh Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| 4033259 | D/9 Drawing number reference only Oshkosh Defense Llc |
NSN 5310-01-666-3303 is a Washer,flat, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-666-3303 has 2 manufacturer part numbers on file: 12605209-032 (U S Army Tank Automotive Command Amsta-Im-Mm), 4033259032 (Oshkosh Defense Llc).
Key specifications for 12605209-032: Overall Diameter: 1.993 INCHES MINIMUM AND 2.030 INCHES MAXIMUM IN; Cross-Sectional Shape Style: RECTANGULAR; Color: BLACK OVERALL; Surface Treatment: PHOSPHATE AND 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.