NSN 4820-01-497-7582 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-497-7582. Manufacturer of record part number: H-16-8T.
Flange Seat to Disk End Height: 0.187 INCHES NOMINAL IN
Flange Diameter: 0.437 INCHES NOMINAL IN
Body Outside Diameter: 0.251 INCHES NOMINAL IN
Style Designator: PLAIN FLANGED
Body Inside Diameter: 0.140 INCHES NOMINAL IN
Under Flange Height: 0.500 INCHES NOMINAL IN
Material: STEEL OVERALL
Identification
NSN: 4820-01-497-7582
NIIN: 014977582
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: H-16-8T
Manufacturer: Textron Inc
General Description
The Seat,valve, cataloged under National Stock Number 4820-01-497-7582, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Textron Inc. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-01-497-7582
Primary Part Number
H-16-8T
Item Name
Seat,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Textron Inc
Status
ACTIVE
Flange Seat to Disk End Height
0.187 INCHES NOMINAL IN
Flange Diameter
0.437 INCHES NOMINAL IN
Body Outside Diameter
0.251 INCHES NOMINAL IN
Style Designator
PLAIN FLANGED
Body Inside Diameter
0.140 INCHES NOMINAL IN
Under Flange Height
0.500 INCHES NOMINAL IN
Material
STEEL OVERALL
Seat Angle in Deg
60.000 NOMINAL
Seating Surface Shape
ANGULAR
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items8
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
3040-01-497-9156595-7067876-56POSSIBLE MATCH
CAM,CONTROL
Possible match (shared part number)Naval Sea Systems Command
3040-01-497-9159595-7067876-60POSSIBLE MATCH
CAM,CONTROL
Possible match (shared part number)Naval Sea Systems Command
3010-01-498-0767595-7067876-173POSSIBLE MATCH
SPIDER,UNIVERSAL JOINT,NON VEHIC
Possible match (shared part number)Naval Sea Systems Command
3040-01-498-1149595-7067876-166POSSIBLE MATCH
SHAFT,SHOULDERED
Possible match (shared part number)Naval Sea Systems Command
3040-01-498-1180595-7067876-167POSSIBLE MATCH
SHAFT,SHOULDERED
Possible match (shared part number)Naval Sea Systems Command
3040-01-498-1247595-7067876-A2POSSIBLE MATCH
CABLE ASSEMBLY,CONTROL
Possible match (shared part number)Naval Sea Systems Command
5340-01-498-8007595-7067876-165POSSIBLE MATCH
PLUNGER,DETENT
Possible match (shared part number)Naval Sea Systems Command
4820-01-644-7476595-7067876-153POSSIBLE MATCH
BUTTON
Possible match (shared part number)Naval Sea Systems Command
NSN 4820-01-497-7582 is a Seat,valve, manufactured by Textron Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-497-7582?
NSN 4820-01-497-7582 has 2 manufacturer part numbers on file: H-16-8T (Textron Inc), 595-7067876-119 (Naval Sea Systems Command).
What NSN replaces 4820-01-497-7582?
8 possible matches (shared part number, not a government interchangeability claim): 3040-01-497-9156, 3040-01-497-9159, 3010-01-498-0767. Verify interchangeability with system specifications before substitution.
What are the specifications of H-16-8T?
Key specifications for H-16-8T: Flange Seat to Disk End Height: 0.187 INCHES NOMINAL IN; Flange Diameter: 0.437 INCHES NOMINAL IN; Body Outside Diameter: 0.251 INCHES NOMINAL IN; Style Designator: PLAIN FLANGED. 9 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-497-7582 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.