PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1000-33Seat,valve

Aqualung Usa, Inc · NSN 4820-00-977-9044 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-977-9044 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-977-9044. Primary manufacturer part number: 1000-33.
Features
  • Seat,valve — FSC 4820
  • Thread Quantity Per Inch: 20 SINGLE THREADED PORTION
  • Thread Class: 2A SINGLE THREADED PORTION A
  • Nominal Thread Size: 0.438 INCHES SINGLE THREADED PORTION IN
  • 1 verified cross-reference
  • Primary manufacturer: Aqualung Usa, Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Seat,valve, cataloged under National Stock Number 4820-00-977-9044, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Aqualung Usa, Inc. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-977-9044
Primary Part Number1000-33
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerAqualung Usa, Inc
StatusACTIVE
Thread Quantity Per Inch20 SINGLE THREADED PORTION
Thread Class2A SINGLE THREADED PORTION A
Nominal Thread Size0.438 INCHES SINGLE THREADED PORTION IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5305-00-010-0033100033 INTERCHANGEABLE
Screw,cap,hexagon Head
Abm Equipment, Llc
5340-00-011-98011000-33 INTERCHANGEABLE
Plug,vent
Nammo Defense Systems Inc. Dba Nammo Defense Systems Inc
1560-00-077-174510-003-3 INTERCHANGEABLE
Adapter,bonding Cli
Bell Textron Inc
5998-00-197-2004 INTERCHANGEABLE
Circuit Card Assembly
3120-00-350-0014 INTERCHANGEABLE
Bearing
5340-00-533-1767100033 INTERCHANGEABLE
Grip,handle
Anchor Elastotech Llc
5840-00-770-1974100033 INTERCHANGEABLE
Fixture
Meggitt North Hollywood Inc
6150-00-896-0037100033 INTERCHANGEABLE
Cable Assembly,power,electrical
Mission Systems Davenport Inc.
5330-00-911-8778100033 INTERCHANGEABLE
Gasket
Integral Aerospace, Llc Dba Pcx Aerosystems - Santa Ana Div Integral Aerospace, Llc Dba Pcx Aerosystems - Santa Ana
6665-01-157-711511-0121 INTERCHANGEABLE
Filtering Material
Bacharach, Inc.
Cross-Reference Index
Part NumberManufacturer
1000-33 PRIMARY Aqualung Usa, Inc (USA)
Related Parts
5305-00-010-0033INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
100033
5340-00-011-9801INTERCHANGEABLE
PLUG,VENT
1000-33
1560-00-077-1745INTERCHANGEABLE
ADAPTER,BONDING CLI
10-003-3
5998-00-197-2004INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
3120-00-350-0014INTERCHANGEABLE
BEARING
5340-00-533-1767INTERCHANGEABLE
GRIP,HANDLE
100033
5840-00-770-1974INTERCHANGEABLE
FIXTURE
100033
6150-00-896-0037INTERCHANGEABLE
CABLE ASSEMBLY,POWER,ELECTRICAL
100033
5330-00-911-8778INTERCHANGEABLE
GASKET
100033
6665-01-157-7115INTERCHANGEABLE
FILTERING MATERIAL
11-0121
6105-01-221-1321INTERCHANGEABLE
MOTOR,ALTERNATING CURRENT
5995-01-529-3191INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
100033-3

Frequently Asked Questions

What is NSN 4820-00-977-9044?

NSN 4820-00-977-9044 is a Seat,valve, manufactured by Aqualung Usa, Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-977-9044?

NSN 4820-00-977-9044 has 1 cross-referenced part number: 1000-33 (Aqualung Usa, Inc).

What NSN replaces 4820-00-977-9044?

There are 12 known substitutes for 4820-00-977-9044: 5305-00-010-0033, 5340-00-011-9801, 1560-00-077-1745 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1000-33?

Key specifications for 1000-33: Thread Quantity Per Inch: 20 SINGLE THREADED PORTION; Thread Class: 2A SINGLE THREADED PORTION A; Nominal Thread Size: 0.438 INCHES SINGLE THREADED PORTION IN. 3 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com