The Washer,lock, cataloged under National Stock Number 5310-01-503-0440, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Velan Valve Corp.. Government technical data includes 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-503-0440 |
| Primary Part Number | HMM11-2A-001-3IN PC10 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Velan Valve Corp. |
| Status | ACTIVE |
| Outside Diameter | 3.000 INCHES NOMINAL IN |
| Material | TITANIUM OVERALL |
| 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 |
|---|---|
| HMM11-2A-001-3IN PC10 PRIMARY | Velan Valve Corp. (USA) |
| Reference | Meaning |
|---|---|
| HMM11-2A-001 | D/9 Drawing number reference only Velan Valve Corp. |
| HMM11-2A-001-3I | C/1 Advisory reference — outside the item-of-supply concept Velan Valve Corp. |
NSN 5310-01-503-0440 is a Washer,lock, manufactured by Velan Valve Corp., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-503-0440 has 1 manufacturer part number on file: HMM11-2A-001-3IN PC10 (Velan Valve Corp.).
Key specifications for HMM11-2A-001-3IN PC10: Outside Diameter: 3.000 INCHES NOMINAL IN; End Item Identification: VALVE, CHECK; Material: TITANIUM OVERALL. 2 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.