The Valve,safety Relief, cataloged under National Stock Number 4820-01-336-4645, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Milton Roy Llc Dba Milton Roy Americas. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-336-4645 |
| Primary Part Number | B-102-0290-000 ITEM 221C |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Milton Roy Llc Dba Milton Roy Americas |
| Status | ACTIVE |
| Flow Control Device | O-RING, DILATING |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Style Designator | DROP-IN CARTRIDGE |
| Media for Which Designed | LIQUID SINGLE RESPONSE |
| 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 |
|---|---|
| B-102-0290-000 ITEM 221C PRIMARY | Milton Roy Llc Dba Milton Roy Americas (USA) |
| Reference | Meaning |
|---|---|
| B-102-0290-000 ITEM 221C | 3/9 Design control — primary reference Milton Roy Co Flow Control Div |
NSN 4820-01-336-4645 is a Valve,safety Relief, manufactured by Milton Roy Llc Dba Milton Roy Americas, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-336-4645 has 1 manufacturer part number on file: B-102-0290-000 ITEM 221C (Milton Roy Llc Dba Milton Roy Americas).
Key specifications for B-102-0290-000 ITEM 221C: Flow Control Device: O-RING, DILATING; Connection Type: THREADED INTERNAL PIPE ALL ENDS; Style Designator: DROP-IN CARTRIDGE; Media for Which Designed: LIQUID SINGLE RESPONSE. 4 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.