The Valve,stop-Spool, cataloged under National Stock Number 4820-01-123-1635, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ontic Engineering & Manufacturing, Inc Dba Ontic Us. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-123-1635 |
| Primary Part Number | 42960A |
| Item Name | Valve,stop-Spool |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ontic Engineering & Manufacturing, Inc Dba Ontic Us |
| Status | ACTIVE |
| General Characteristics Item Description | ALUMINUM ALLOY,QQ-A-225/9; 0.520 IN. MIN AND 0.540 IN. MAX OD; 0.510 IN. MIN AND 0.512 IN. MAX L IN |
| 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 |
|---|---|
| 42960A PRIMARY | Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA) |
| Reference | Meaning |
|---|---|
| 42960A | 5/9 Secondary reference Donallco Inc |
| 42960A | 5/9 Secondary reference Itt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S |
| 10366589 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 4820-01-123-1635 is a Valve,stop-Spool, manufactured by Ontic Engineering & Manufacturing, Inc Dba Ontic Us, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-123-1635 has 1 manufacturer part number on file: 42960A (Ontic Engineering & Manufacturing, Inc Dba Ontic Us).
Key specifications for 42960A: General Characteristics Item Description: ALUMINUM ALLOY,QQ-A-225/9; 0.520 IN. MIN AND 0.540 IN. MAX OD; 0.510 IN. MIN AND 0.512 IN. MAX L IN. 1 specification is 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.