The Washer,flat, cataloged under National Stock Number 5310-01-189-8478, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Grove U.s. Llc Dba Grove Us Llc. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-189-8478 |
| Primary Part Number | 6-294-003907 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Grove U.s. Llc Dba Grove Us Llc |
| Status | ACTIVE |
| Overall Diameter | 1.993 INCHES MINIMUM AND 2.030 INCHES MAXIMUM IN |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | ASTM A325 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A325 ASSN STD 2ND MATERIAL RESPONSE OR ASTM A325 ASSN STD 3RD MATERIAL RESPONSE OR ASTM A325 ASSN STD 4TH MATERIAL RESPONSE OR ASTM A325 ASSN STD 5TH MATERIAL RESPONSE OR ASTM A325 ASSN STD 6TH MATERIAL RESPONSE OR ASTM A325 ASSN STD 7TH MATERIAL RESPONSE OR ASTM A325 ASSN STD 8TH MATERIAL RESPONSE OR ASTM A490 ASSN STD 9TH MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL UNS K02706 OR STEEL UNS K11900 OR STEEL UNS K12033 OR STEEL UNS K12059 OR STEEL UNS K12238 OR STEEL UNS K12254 OR STEEL UNS K13643 OR STEEL UNS K14358 OR STEEL UNS K03900 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 1.055 INCHES MINIMUM AND 1.092 INCHES MAXIMUM IN |
| Thickness | 0.136 INCHES MINIMUM AND 0.177 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 |
|---|---|
| 2CD866 | Oshkosh Defense Llc (USA) |
| 6-294-003907 PRIMARY | Grove U.s. Llc Dba Grove Us Llc (USA) |
| 7949000359 PRIMARY | Grove U.s. Llc Dba Grove Us Llc (USA) |
| Reference | Meaning |
|---|---|
| 7-949-000359 | 5/9 Secondary reference Minnpar, Llc Dba Minnpar |
| 27E16 | C/1 Advisory reference — outside the item-of-supply concept Clark Equipment Co |
| 2CD866 | 5/9 Secondary reference Oshkosh Corp |
NSN 5310-01-189-8478 is a Washer,flat, manufactured by Grove U.s. Llc Dba Grove Us Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-189-8478 has 3 manufacturer part numbers on file: 2CD866 (Oshkosh Defense Llc), 6-294-003907 (Grove U.s. Llc Dba Grove Us Llc), 7949000359 (Grove U.s. Llc Dba Grove Us Llc).
Key specifications for 6-294-003907: Overall Diameter: 1.993 INCHES MINIMUM AND 2.030 INCHES MAXIMUM IN; Hardness Rating: 36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM; Material Document and Classification: ASTM A325 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A325 ASSN STD 2ND MATERIAL RESPONSE OR ASTM A325 ASSN STD 3RD MATERIAL RESPONSE OR ASTM A325 ASSN STD 4TH MATERIAL RESPONSE OR ASTM A325 ASSN STD 5TH MATERIAL RESPONSE OR ASTM A325 ASSN STD 6TH MATERIAL RESPONSE OR ASTM A325 ASSN STD 7TH MATERIAL RESPONSE OR ASTM A325 ASSN STD 8TH MATERIAL RESPONSE OR ASTM A490 ASSN STD 9TH 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.