The Valve,ball, cataloged under National Stock Number 4820-01-187-9976, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Portland Valve Llc. Government technical data includes 11 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-187-9976 |
| Primary Part Number | 1/2IN-A36GT |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Portland Valve Llc |
| Status | ACTIVE |
| Connection Style | PLAIN,OPTIONAL END(PIPE) ALL ENDSPLAIN,OPTIONAL END(PIPE) ALL ENDS |
| Connection Type | THREADED INTERNAL PIPE ALL ENDSTHREADED INTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRUSTRAIGHT THRU |
| Thread Direction | RIGHT-HAND ALL ENDSRIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.250 INCHES ALL ENDS0.250 INCHES ALL ENDS IN |
| Material | STEEL COMP 316 BODY |
| Material | STEEL COMP 316 STEM |
| Material | STEEL COMP 316 FLOW CONTROL DEVICE |
| Material | RUBBER FLUOROCARBON CLASS FPM SEAT |
| Thread Series Designator | NPT ALL ENDSNPT ALL ENDS |
| Valve Operation Method | MANUALMANUAL |
| 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 |
|---|---|
| 1/2IN-A36GT PRIMARY | Portland Valve Llc (USA) |
| Reference | Meaning |
|---|---|
| 1/4IN-A36GT | 5/9 Secondary reference Portland Valve Llc |
| 1-4A-36G | C/1 Advisory reference — outside the item-of-supply concept Metso Automation Usa, Inc |
| A-36TT-1/4 | C/1 Advisory reference — outside the item-of-supply concept Metso Automation Usa, Inc |
NSN 4820-01-187-9976 is a Valve,ball, manufactured by Portland Valve Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-187-9976 has 1 manufacturer part number on file: 1/2IN-A36GT (Portland Valve Llc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-355-5775. Verify interchangeability with system specifications before substitution.
Key specifications for 1/2IN-A36GT: Connection Style: PLAIN,OPTIONAL END(PIPE) ALL ENDSPLAIN,OPTIONAL END(PIPE) ALL ENDS; Connection Type: THREADED INTERNAL PIPE ALL ENDSTHREADED INTERNAL PIPE ALL ENDS; Style Designator: STRAIGHT THRUSTRAIGHT THRU; Thread Direction: RIGHT-HAND ALL ENDSRIGHT-HAND ALL ENDS. 11 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.