The Valve,angle, cataloged under National Stock Number 4820-00-404-8460, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Mueller Brass Co.. Government technical data includes 13 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-404-8460 |
| Primary Part Number | A13977 |
| Item Name | Valve,angle |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Mueller Brass Co. |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 0.500 INCHES SECOND END0.500 INCHES SECOND END IN |
| Connection Style | PLAIN (PIPE) SECOND ENDPLAIN (PIPE) SECOND END |
| Connection Type | THREADED EXTERNAL PIPE SECOND ENDTHREADED EXTERNAL PIPE SECOND END |
| Connection Type | UNTHREADED INTERNAL TUBE FIRST ENDUNTHREADED INTERNAL TUBE FIRST END |
| Style Designator | ANGLE |
| Nominal Outside Diameter Tube Accommodated | 0.500 INCHES FIRST END IN |
| Operating Pressure | 500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Features Provided | VALVE STEM LOCK SHIELDVALVE STEM LOCK SHIELD |
| Thread Direction | RIGHT-HAND SECOND ENDRIGHT-HAND SECOND END |
| Nominal Thread Size | 0.500 INCHES SECOND END0.500 INCHES SECOND END IN |
| Test Data Document | 94833-84015 DRAWING (THIS IS THE BASIC GOVERNING DRAWING, SUCH AS A CONTRACTOR DRAWING, ORIGINAL EQUIPMENT MANUFACTURER DRAWING, ETC.; EXCLUDES ANY SPECIFICATION, STANDARD OR OTHER DOCUMENT THAT MAY BE REFERENCED IN A BASIC GOVERNING DRAWING) |
| Thread Quantity Per Inch | 14 SECOND END14 SECOND END |
| Thread Series Designator | NPTF SECOND END |
| 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 |
|---|---|
| A13977 | Mueller Brass Co. (USA) |
| Reference | Meaning |
|---|---|
| 54088-3 | 5/9 Secondary reference Drs Environmental Systems Inc |
| 54088-3 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 54088-3 | 3/9 Design control — primary reference U.S. Government activity |
NSN 4820-00-404-8460 is a Valve,angle, manufactured by Mueller Brass Co., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-404-8460 has 1 manufacturer part number on file: A13977 (Mueller Brass Co.).
Key specifications for A13977: Nominal Pipe Size Accommodated: 0.500 INCHES SECOND END0.500 INCHES SECOND END IN; Connection Style: PLAIN (PIPE) SECOND ENDPLAIN (PIPE) SECOND END; Connection Type: THREADED EXTERNAL PIPE SECOND ENDTHREADED EXTERNAL PIPE SECOND END; Connection Type: UNTHREADED INTERNAL TUBE FIRST ENDUNTHREADED INTERNAL TUBE FIRST END. 13 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.