The Ball,check, cataloged under National Stock Number 4820-01-595-4059, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 3 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-595-4059 |
| Primary Part Number | 46495K18 |
| Item Name | Ball,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Valve Size for Which Designed | 0.250 INCHES IN |
| Valve Design Control Activity | 39428 |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| 46495K18 PRIMARY | Mcmaster-Carr Supply Co (USA) |
NSN 4820-01-595-4059 is a Ball,check, manufactured by Mcmaster-Carr Supply Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-595-4059 has 1 manufacturer part number on file: 46495K18 (Mcmaster-Carr Supply Co).
Key specifications for 46495K18: Valve Size for Which Designed: 0.250 INCHES IN; Special Features: VALVE HAS UNRESTRICTED FLOW AND HAS FULL PORT, SEATS AND SEALS THAT ARE GLASS-FILLED PTFE;MAXIMUM PRESSURE FOR WATER, OIL AND INERT GAS:1000 PSI AT 200 DEG F; MAX PRESSUSRE FOR STEAM-150 PSI AT 366 DEG. F, TEMP RANGE-0 TO 450 DEG. F. VACUUM NOT RATED, CONNECTIONS ARE 1/4 IN. NPT FEMALE, 18 THREADS PER INCH, 0.40 IN. THREAD ENGAGEMENT. ITEM HAS LEVER HANDLE WHICH CAN BE LOCKED IN POSITION USING A PADLOCK(NOT INCLUDED) WITH A SHACKLE DIA. OF 1.4 IN. IN; Part Name Assigned by Controlling Agency: TYPE 316 STAINLESS STEEL BALL VALVE; Valve Design Control Activity: 39428. 3 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.