The Valve,globe, cataloged under National Stock Number 4820-01-284-8159, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Derbyshire Machine & Tool Co. Government technical data includes 17 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-284-8159 |
| Primary Part Number | M4049 |
| Item Name | Valve,globe |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Derbyshire Machine & Tool Co |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Nominal Pipe Size Accommodated | 4.000 INCHES ALL ENDS IN |
| Connection Style | BEVELED (PIPE) ALL ENDS |
| Connection Type | BUTT WELD PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | ASTM A351 GRADE CF3M ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | ASTM A276 TYPE 403 ASSN STD SINGLE MATERIAL RESPONSE STEM |
| Material Document and Classification | ASTM A351 GRADE CF3M ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Operating Pressure | 275.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Bonnet Type | OUTSIDE SCREW-YOKE |
| Maximum Operating Temp | 400.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Bonnet Attachment Method | BOLTED |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE PACKING |
| Material | STEEL UNS J92800 BODY |
| Material | STEEL COMP 403 STEM |
| Material | STEEL UNS J92800 FLOW CONTROL DEVICE |
| 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 |
|---|---|
| M4049 PRIMARY | Derbyshire Machine & Tool Co (USA) |
| Reference | Meaning |
|---|---|
| MV-21W4S-SC | D/9 Drawing number reference only Newmans Inc New Jersey Div |
| M4049 | 5/9 Secondary reference Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc |
| MV-21WAS-SC | D/9 Drawing number reference only Newmans Inc New Jersey Div |
| 21W-C3M3-SC,MV-21W4S-SC | 3/9 Design control — primary reference Newmans Inc New Jersey Div |
NSN 4820-01-284-8159 is a Valve,globe, manufactured by Derbyshire Machine & Tool Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-284-8159 has 1 manufacturer part number on file: M4049 (Derbyshire Machine & Tool Co).
Key specifications for M4049: Flow Control Device: DISK; Nominal Pipe Size Accommodated: 4.000 INCHES ALL ENDS IN; Connection Style: BEVELED (PIPE) ALL ENDS; Connection Type: BUTT WELD PIPE ALL ENDS. 17 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.