The Washer,flat, cataloged under National Stock Number 5310-01-423-7140, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Ammcon Corp.. Government technical data includes 7 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-423-7140 |
| Primary Part Number | BMC-3479CCN PART 13 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Ammcon Corp. |
| Status | ACTIVE |
| Overall Diameter | 1.262 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | RUBBER SILICONE CLASS Q OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.312 INCHES NOMINAL IN |
| Thickness | 0.120 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 |
|---|---|
| BMC-3479CCN PART 13 PRIMARY | Ammcon Corp. (USA) |
| Reference | Meaning |
|---|---|
| BMC-3479A PART 13 | 5/9 Secondary reference Bidoro Mfg Co Po Box 103 Huntington Sta Ny 11746 |
| BMC-3479CCN PART 13 | 3/9 Design control — primary reference Bidoro Mfg Co Po Box 103 Huntington Sta Ny 11746 |
| BMC-3479C PART 13 | 5/9 Secondary reference Bidoro Mfg Co Po Box 103 Huntington Sta Ny 11746 |
NSN 5310-01-423-7140 is a Washer,flat, manufactured by Ammcon Corp., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-423-7140 has 1 manufacturer part number on file: BMC-3479CCN PART 13 (Ammcon Corp.).
Key specifications for BMC-3479CCN PART 13: Overall Diameter: 1.262 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Material: RUBBER SILICONE CLASS Q OVERALL. 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.