The Valve,ball, cataloged under National Stock Number 4820-01-090-9121, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Gammon Technical Products Inc. Government technical data includes 10 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-090-9121 |
| Primary Part Number | GTP-1149-4F |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Gammon Technical Products Inc |
| Status | ACTIVE |
| Connection Style | PLAIN,OPTIONAL END(PIPE) ALL ENDS |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.250 INCHES ALL ENDS IN |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Material | STEEL CORROSION RESISTING BODY |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE SEAT |
| Thread Series Designator | NPT ALL ENDS |
| 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 |
|---|---|
| GTP-1149-4F PRIMARY | Gammon Technical Products Inc (USA) |
| Reference | Meaning |
|---|---|
| GTP-1149-4FF | 5/9 Secondary reference Gammon Technical Products Inc |
| 1149-4F | 5/9 Secondary reference Gammon Technical Products Inc |
| GTP-1149 | 5/9 Secondary reference Gammon Technical Products Inc |
| GTP-1149F | 5/9 Secondary reference Gammon Technical Products Inc |
NSN 4820-01-090-9121 is a Valve,ball, manufactured by Gammon Technical Products Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-090-9121 has 1 manufacturer part number on file: GTP-1149-4F (Gammon Technical Products Inc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-145-0380. Verify interchangeability with system specifications before substitution.
Key specifications for GTP-1149-4F: Connection Style: PLAIN,OPTIONAL END(PIPE) ALL ENDS; Connection Type: THREADED INTERNAL PIPE ALL ENDS; Style Designator: STRAIGHT THRU; Thread Direction: RIGHT-HAND ALL ENDS. 10 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.