The Washer,flat, cataloged under National Stock Number 5310-01-370-0630, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Pac Zonamatic Inc. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Item Name | Washer,flat |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | Pac Zonamatic Inc (CAGE 5H383); Anillo Industries Llc (CAGE 10630); Moeller Manufacturing & Supply, Llc (CAGE 58009) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-370-0630 |
| Primary Part Number | HS306-323L |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Pac Zonamatic Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| HS306-323L PRIMARY | Pac Zonamatic Inc (USA) |
| HS306-323L PRIMARY | Anillo Industries Llc (USA) |
| HS306-323L PRIMARY | Moeller Manufacturing & Supply, Llc (USA) |
| Reference | Meaning |
|---|---|
| HS306-323L | 5/9 Secondary reference Mcdonnell Douglas Helicopter Co Inc |
| HS306-323L | 3/2 Design control — primary reference U.S. Government activity |
| HS306-323L | 7/2 Vendor item drawing reference The Boeing Company |
NSN 5310-01-370-0630 is a Washer,flat, manufactured by Pac Zonamatic Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-370-0630 has 3 manufacturer part numbers on file: HS306-323L (Pac Zonamatic Inc), HS306-323L (Anillo Industries Llc), HS306-323L (Moeller Manufacturing & Supply, Llc).
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.