The Washer,flat, cataloged under National Stock Number 5310-01-323-2920, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Anillo Industries Llc. Government technical data includes 8 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-323-2920 |
| Primary Part Number | 4D0009C4 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Anillo Industries Llc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | AMS 5596 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5597 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.460 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | NICKEL ALLOY 718 OVERALL |
| Hole Diameter | 0.251 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN |
| Thickness | 0.057 INCHES MINIMUM AND 0.069 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 |
|---|---|
| 4D0009C4 | Anillo Industries Llc (USA) |
| 4D0009C4 | Moeller Manufacturing & Supply, Llc (USA) |
| Reference | Meaning |
|---|---|
| MS14183L-C4 | 5/9 Secondary reference U.S. Government activity |
| 5D0009C4 | 5/2 Secondary reference U.S. Government activity |
| NASM14183 | 3/1 Design control — primary reference U.S. Government activity |
| MS14183L-C4 | 3/2 Design control — primary reference U.S. Government activity |
| 10474817 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 5310PL1248177 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 4D0009C4 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-323-2920 is a Washer,flat, manufactured by Anillo Industries Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-323-2920 has 2 manufacturer part numbers on file: 4D0009C4 (Anillo Industries Llc), 4D0009C4 (Moeller Manufacturing & Supply, Llc).
Key specifications for 4D0009C4: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Hardness Rating: 36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM; Material Document and Classification: AMS 5596 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5597 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.460 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN. 8 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.