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NSN 4820-01-197-8984Government record, cited
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Block, Trigger, Valve4820-01-197-8984

NSN 4820-01-197-8984 · NIIN 011978984 · Part number 20335-H PIECE 33
Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 04537
Government record, cited
NSN 4820-01-197-8984 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-197-8984. Manufacturer of record part number: 20335-H PIECE 33.
Also searched as  4820-01-197-8984 · 4820011978984 · NIIN 011978984 · 01-197-8984 · FSC 4820 Valves, Nonpowered · CAGE 04537 · 20335-H PIECE 33 · 20335-H
Nearby stock numbers  ·
GATE VALVE PROFILE
4820-01-197-8984 — Valves, Nonpowered
Features
  • Block,trigger,valve — FSC 4820
  • General Characteristics Item Description: STEEL,A-322 GR.4150,HARDNESS 450-500 BRINELL
  • 1 manufacturer part number on file
  • Manufacturer of record: Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa
Identification
  • NSN: 4820-01-197-8984
  • NIIN: 011978984
  • FSC: 4820 — Valves, Nonpowered
  • FSG: 48 — Valves
  • Primary part number: 20335-H PIECE 33
  • Manufacturer: Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa
General Description

The Block,trigger,valve, cataloged under National Stock Number 4820-01-197-8984, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-197-8984
Primary Part Number20335-H PIECE 33
Item NameBlock,trigger,valve
FSC / FSG4820 / 48 — Valves, Nonpowered
ManufacturerAtwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa
StatusACTIVE
General Characteristics Item DescriptionSTEEL,A-322 GR.4150,HARDNESS 450-500 BRINELL
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
⇄ Related Items 6
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-197-899332447-020-3294-031 POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa
4820-01-197-902222036-A POSSIBLE MATCH
DISK,VALVE
Possible match (shared part number)Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa
3040-01-198-302820335-H PIECE 6 POSSIBLE MATCH
PISTON,LINEAR ACTUATING CYLINDER
Possible match (shared part number)Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa
3040-01-198-307420335-H PIECE 5 POSSIBLE MATCH
CYLINDER,ACTUATING,LINEAR
Possible match (shared part number)Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa
3040-01-198-307620335-H PIECE 2 POSSIBLE MATCH
CYLINDER ASSEMBLY,ACTUATING,LINE
Possible match (shared part number)Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa
4820-01-199-876120335-H PIECE 21 POSSIBLE MATCH
RING,BODY,VALVE
Possible match (shared part number)Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa
Cross-Reference Index
Part NumberManufacturer
20335-H PIECE 33 PRIMARY Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa (USA)
Reference documents
ReferenceMeaning
20335-H D/9 Drawing number reference only
Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa
Related Parts
4820-01-197-8993POSSIBLE MATCH
STEM,FLUID VALVE
32447-020-3294-031
4820-01-197-9022POSSIBLE MATCH
DISK,VALVE
22036-A
3040-01-198-3028POSSIBLE MATCH
PISTON,LINEAR ACTUATING CYLINDER
20335-H PIECE 6
3040-01-198-3074POSSIBLE MATCH
CYLINDER,ACTUATING,LINEAR
20335-H PIECE 5
3040-01-198-3076POSSIBLE MATCH
CYLINDER ASSEMBLY,ACTUATING,LINE
20335-H PIECE 2
4820-01-199-8761POSSIBLE MATCH
RING,BODY,VALVE
20335-H PIECE 21

Frequently Asked Questions

What is NSN 4820-01-197-8984?

NSN 4820-01-197-8984 is a Block,trigger,valve, manufactured by Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-197-8984?

NSN 4820-01-197-8984 has 1 manufacturer part number on file: 20335-H PIECE 33 (Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa).

What NSN replaces 4820-01-197-8984?

6 possible matches (shared part number, not a government interchangeability claim): 4820-01-197-8993, 4820-01-197-9022, 3040-01-198-3028. Verify interchangeability with system specifications before substitution.

What are the specifications of 20335-H PIECE 33?

Key specifications for 20335-H PIECE 33: General Characteristics Item Description: STEEL,A-322 GR.4150,HARDNESS 450-500 BRINELL. 1 specification is documented in the U.S. Government catalog.

Is NSN 4820-01-197-8984 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.

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✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.
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