The Valve,linear,directional Control, cataloged under National Stock Number 4820-01-702-7581, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-702-7581 |
| Item Name | Valve,linear,directional Control |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| End Connection Quantity | 2 |
| Body Material | STEEL CORROSION RESISTING |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| FCFA2810500L | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-702-7581 is a Valve,linear,directional Control, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-702-7581: End Connection Quantity: 2; Body Material: STEEL CORROSION RESISTING; Special Features: RESTRICTED FLOW IN ONE DIRECTION AND FREE FLOW IN THE OTHER DIRECTION. BODY, PIN, SPRING SEAT, ORIFICE PLATE, SHUTTLE PLATE: 303 CRES (AMS-QQ-S-763C). SPRING: 17-7PH CRES (AMS5678). SCREEN: 304L CRES (ASTM A 666). BRAZE: AMS4774. ALL CRES PARTS PASSIVATED. NOMINAL SYSTEM PRESSURE UP TO 3000 PSI. 175 LOHMS MAX. NOMINAL WEIGHT: 4.7 GRAMS. CRACKING PRESSURE: 2 - 8 PSID. NOMINAL SCREEN HOLE SIZE: 0.008 INCHES. PLUS/MINUS 10 PERCENT LOHN RATE TOLERANCE. 0.281 IN DIAMETER AND 0.96 IN LENGTH. G; Part Name Assigned by Controlling Agency: 281 FLOW CONTROL/ INSERT RETAINED, DIRECTIONAL FLOW CONTROL VALVE WITH INTEGRAL SAFETY SCREENS. 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.