The Washer,flat, cataloged under National Stock Number 5310-01-661-3003, 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 7 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-661-3003 |
| Primary Part Number | 12600619-003 |
| 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 | 11.570 MILLIMETERS MINIMUM AND 12.000 MILLIMETERS MAXIMUM MM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 6.400 MILLIMETERS MINIMUM AND 6.620 MILLIMETERS MAXIMUM MM |
| Thickness | 1.400 MILLIMETERS MINIMUM AND 1.800 MILLIMETERS MAXIMUM MM |
| 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 |
|---|---|
| 3836243003 | Oshkosh Defense Llc (USA) |
| 12600619-003 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 5310-01-661-3003 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 5310-01-661-3003 has 2 manufacturer part numbers on file: 3836243003 (Oshkosh Defense Llc), 12600619-003 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12600619-003: Overall Diameter: 11.570 MILLIMETERS MINIMUM AND 12.000 MILLIMETERS MAXIMUM MM; Cross-Sectional Shape Style: RECTANGULAR; Special Features: FINISH:D60, TYPE I PER FM100; Peripheral Shape Style: ROUND. 7 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.