The Valve,cross, cataloged under National Stock Number 4820-00-264-8581, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Royal Technology Corporation Dba Royal Technology Corportation. Government technical data includes 25 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-00-264-8581 |
| Primary Part Number | B5255 |
| Item Name | Valve,cross |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Royal Technology Corporation Dba Royal Technology Corportation |
| Status | ACTIVE |
| Flow Control Device | STEM |
| Connection Style | PLAIN,OPTIONAL END(PIPE) FIRST END |
| Connection Style | GASKET SEAL(BOSS) SECOND END |
| Connection Style | GASKET SEAL(BOSS) THIRD END |
| Connection Type | THREADED INTERNAL BOSS THIRD END |
| Connection Type | THREADED INTERNAL BOSS SECOND END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Style Designator | CROSS |
| Bonnet Type | INSIDE SCREW |
| Thread Direction | RIGHT-HAND SECOND END |
| Thread Direction | RIGHT-HAND THIRD END |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.562 INCHES THIRD END IN |
| Nominal Thread Size | 0.562 INCHES SECOND END IN |
| Nominal Thread Size | 0.250 INCHES FIRST END IN |
| Bonnet Attachment Method | THREADED |
| Thread Class | 2B SECOND END |
| Thread Class | 2B THIRD END |
| Material | PLASTIC SEAT |
| Material | STEEL COMP 303 BODY |
| Material | STEEL CORROSION RESISTING STEM |
| Thread Series Designator | UNF THIRD END |
| Thread Series Designator | NPT FIRST END |
| Thread Series Designator | UNF SECOND END |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| B5255 PRIMARY | Royal Technology Corporation Dba Royal Technology Corportation (USA) |
| Reference | Meaning |
|---|---|
| B5255 | 5/9 Secondary reference Sequel Systems Inc. Dba S S I |
| B5255 | 5/9 Secondary reference Container Service Inc |
NSN 4820-00-264-8581 is a Valve,cross, manufactured by Royal Technology Corporation Dba Royal Technology Corportation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-264-8581 has 1 manufacturer part number on file: B5255 (Royal Technology Corporation Dba Royal Technology Corportation).
Key specifications for B5255: Flow Control Device: STEM; Connection Style: PLAIN,OPTIONAL END(PIPE) FIRST END; Connection Style: GASKET SEAL(BOSS) SECOND END; Connection Style: GASKET SEAL(BOSS) THIRD END. 25 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.