The Valve,pilot, cataloged under National Stock Number 1720-00-939-8762, is classified within Federal Supply Class 1720 (Aircraft Launching Equipment) of the Aircraft Launch, Landing, and Ground Handling Equipment group. The manufacturer of record is The Entwistle Company Llc. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1720-00-939-8762 |
| Primary Part Number | 509429-1 |
| Item Name | Valve,pilot |
| FSC / FSG | 1720 / 17 — Aircraft Launching Equipment |
| Manufacturer | The Entwistle Company Llc |
| Status | ACTIVE |
| Supplementary Features | CRITCAL APPLICATION ITEM (CAI); AIRCRAFT LAUNCH AND RECOVERY EQUIPMENT (ALRE) |
| Criticality Code Justification | ZZZW |
| Departure From Cited Document | PER DRAWING THIS IS A CRITICAL APPLICATION ITEM AND IS PART OF A SYSTEM SUPPORTING THE LAUNCH AND/OR RECOVERY OF AIRCRAFT AND IS ESSENTIAL TO SYSTEM PERFORMANCE OR OPERATION, OR THE PERSERVATION OF LIFE OR SAFETY OF OPERATING PERSONNEL. |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 509429-1 | The Entwistle Company Llc (USA) |
| Reference | Meaning |
|---|---|
| 509429-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1720-00-939-8762 is a Valve,pilot, manufactured by The Entwistle Company Llc, classified under FSC 1720, Aircraft Launching Equipment. Status: active.
NSN 1720-00-939-8762 has 1 manufacturer part number on file: 509429-1 (The Entwistle Company Llc).
Key specifications for 509429-1: Supplementary Features: CRITCAL APPLICATION ITEM (CAI); AIRCRAFT LAUNCH AND RECOVERY EQUIPMENT (ALRE); Criticality Code Justification: ZZZW; Departure From Cited Document: PER DRAWING THIS IS A CRITICAL APPLICATION ITEM AND IS PART OF A SYSTEM SUPPORTING THE LAUNCH AND/OR RECOVERY OF AIRCRAFT AND IS ESSENTIAL TO SYSTEM PERFORMANCE OR OPERATION, OR THE PERSERVATION OF LIFE OR SAFETY OF OPERATING PERSONNEL.; Part Name Assigned by Controlling Agency: VALVE,PILOT OPERATED 2 WAY NOMINAL SIZE 3/8 IPS. 3 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.
NSN 1720-00-939-8762 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.