The Valve,ball, cataloged under National Stock Number 4820-00-933-1518, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 15 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through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-933-1518 |
| Primary Part Number | 2641-740AY IAT-B&IDT-B L1 |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES FIRST END |
| Flange Face Design | PLAIN FIRST END |
| Bolt Circle Nominal Diameter | 2.438 INCHES FIRST END IN |
| Criticality Code Justification | ZZZY |
| Connection Type | FLANGE FIRST END |
| Style Designator | STRAIGHT THRU |
| Bolt Hole Nominal Diameter | 0.562 INCHES FIRST END IN |
| Operating Pressure | 650.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Nominal Outside Diameter | 3.562 INCHES FIRST END IN |
| Bolt Hole Quantity | 3 FIRST END |
| Face to Face Distance | 9.125 INCHES IN |
| Media for Which Designed | WATER, SALT SINGLE RESPONSE |
| Valve Operation Method | MANUAL |
| Nominal Thickness | 0.718 INCHES FIRST END IN |
| Reference Number Differentiating Characteristics | QUALITY CONTROLLED IN ACCORDANCE WITH NAVSHIPS 0948-045-7010MATERIAL IDENTIFICATION AND CONTROL INSTRUCTIONS FOR LEVEL 1 ITEMS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 2641-740AY IAT-B&IDT-B L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 2640-640ASSYAT1-2IN | 5/1 Secondary reference U.S. Government activity |
| 2641-740 ASSY IATB-IDTBL1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| SS845-2109886ASSYA | 5/1 Secondary reference U.S. Government activity |
| 2641-740ASSYATL1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 2641-740ASSYAT | 5/1 Secondary reference U.S. Government activity |
| SS845-2109886ASSYAT1-2INL1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 2641-740 ASSY IATB-IDTB | 3/1 Design control — primary reference U.S. Government activity |
| 2640-640ASSYAT1-2INL1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 2640-640ASSYA | 5/1 Secondary reference U.S. Government activity |
| SS845-2109886ASSYAT1-2IN | 5/1 Secondary reference U.S. Government activity |
NSN 4820-00-933-1518 is a Valve,ball, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-933-1518 has 1 manufacturer part number on file: 2641-740AY IAT-B&IDT-B L1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for 2641-740AY IAT-B&IDT-B L1: Flange Shape: ROUND WITH HOLES FIRST END; Flange Face Design: PLAIN FIRST END; Bolt Circle Nominal Diameter: 2.438 INCHES FIRST END IN; Criticality Code Justification: ZZZY. 15 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.