The Plug,vent, cataloged under National Stock Number 5340-00-915-9656, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 12 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-915-9656 |
| Primary Part Number | 491989 |
| Item Name | Plug,vent |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| FSC Application Data | CONTROL ASSY,PRESSURE RATIO BLEED,ACFT ENGINE,2995001398687 743548 |
| Vent Hole Diameter | 0.060 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN |
| Length | 1.075 INCHES MINIMUM AND 1.095 INCHES MAXIMUM IN |
| Vent Hole Shape | ROUND |
| Thread Length | 0.320 INCHES MINIMUM AND 0.356 INCHES MAXIMUM IN |
| End Connection Type | THREADED |
| Outside Diameter | 0.990 INCHES MINIMUM AND 1.130 INCHES MAXIMUM IN |
| Inside Diameter | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Material | STEEL CORROSION RESISTING |
| Thread Size and Series/type Designator | 0.750-16 UNF |
| Vent Hole Quantity | 6 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| 491989 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
NSN 5340-00-915-9656 is a Plug,vent, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-915-9656 has 1 manufacturer part number on file: 491989 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
1 possible match (shared part number, not a government interchangeability claim): 5930-01-595-1381. Verify interchangeability with system specifications before substitution.
Key specifications for 491989: FSC Application Data: CONTROL ASSY,PRESSURE RATIO BLEED,ACFT ENGINE,2995001398687 743548; Vent Hole Diameter: 0.060 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN; Length: 1.075 INCHES MINIMUM AND 1.095 INCHES MAXIMUM IN; Vent Hole Shape: ROUND. 12 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.