PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

NMP229 PIECE 51Seat,valve

Kunkle Industries Inc Lonergan Valve Div · NSN 4820-01-112-9843 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-112-9843 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-112-9843. Primary manufacturer part number: NMP229 PIECE 51.
Features
  • Seat,valve — FSC 4820
  • Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
  • Criticality Code Justification: ZZZY
  • 5 verified cross-references
  • Primary manufacturer: Kunkle Industries Inc Lonergan Valve Div
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-112-9843, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Kunkle Industries Inc Lonergan Valve Div. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 2 manufacturers, 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
NSN4820-01-112-9843
Primary Part NumberNMP229 PIECE 51
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerKunkle Industries Inc Lonergan Valve Div
StatusACTIVE
Reference Number Differentiating CharacteristicsMATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
Criticality Code JustificationZZZY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4820-00-036-1744012-500-0006 INTERCHANGEABLE
Seat,valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-00-145-6282 INTERCHANGEABLE
Extension Cam,valve
2920-00-175-9628M5-156H INTERCHANGEABLE
Regulator,engine Generator
Transpo Electronics Inc
5315-00-476-28205156 INTERCHANGEABLE
Pin,straight,headless
Goodrich Aerospace Canada Ltd
1560-00-573-320451-5-19-6 INTERCHANGEABLE
Lanyard Assembly
Lockheed Martin Corporation Div Rotary and Mission Systems
1650-00-658-80555156 INTERCHANGEABLE
Parts Kit,valve,overhaul
Hydro-Aire Aerospace Corp
4030-00-697-07745196 INTERCHANGEABLE
Rod,anchor
Ngk-Locke, Inc.
1055-00-699-0822515-0006 INTERCHANGEABLE
Key
Cummins Power Generation Inc.
5330-00-765-2909G9-103088 INTERCHANGEABLE
Gasket
Norwalk Compreseer Company Inc Dba Norwalk Compressor Company
5935-00-854-7009189302 INTERCHANGEABLE
Connector,plug,electrical
Lockheed Martin Corporation Div Rms - Mitchel Field
Cross-Reference Index
Part NumberManufacturer
NMP229 PIECE 51 Kunkle Industries Inc Lonergan Valve Div (USA)
012.500.0006 Kunkle Industries Inc Lonergan Valve Div (USA)
51.5.6 Kunkle Industries Inc Lonergan Valve Div (USA)
3137348 Naval Ship Systems Command (USA)
NMP-707PC28 Kunkle Industries Inc Lonergan Valve Div (USA)
Related Parts
4820-00-036-1744INTERCHANGEABLE
SEAT,VALVE
012-500-0006
4820-00-145-6282INTERCHANGEABLE
EXTENSION CAM,VALVE
2920-00-175-9628INTERCHANGEABLE
REGULATOR,ENGINE GENERATOR
M5-156H
5315-00-476-2820INTERCHANGEABLE
PIN,STRAIGHT,HEADLESS
5156
1560-00-573-3204INTERCHANGEABLE
LANYARD ASSEMBLY
51-5-19-6
1650-00-658-8055INTERCHANGEABLE
PARTS KIT,VALVE,OVERHAUL
5156
4030-00-697-0774INTERCHANGEABLE
ROD,ANCHOR
5196
1055-00-699-0822INTERCHANGEABLE
KEY
515-0006
5330-00-765-2909INTERCHANGEABLE
GASKET
G9-103088
5935-00-854-7009INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
189302
5935-00-984-3050INTERCHANGEABLE
CONNECTOR BODY,RECEPTACLE,ELECTR
RF-02652
4820-01-112-9932INTERCHANGEABLE
STEM,FLUID VALVE

Frequently Asked Questions

What is NSN 4820-01-112-9843?

NSN 4820-01-112-9843 is a Seat,valve, manufactured by Kunkle Industries Inc Lonergan Valve Div, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-112-9843?

NSN 4820-01-112-9843 has 5 cross-referenced part numbers: NMP229 PIECE 51 (Kunkle Industries Inc Lonergan Valve Div), 012.500.0006 (Kunkle Industries Inc Lonergan Valve Div), 51.5.6 (Kunkle Industries Inc Lonergan Valve Div), 3137348 (Naval Ship Systems Command), NMP-707PC28 (Kunkle Industries Inc Lonergan Valve Div).

What NSN replaces 4820-01-112-9843?

There are 12 known substitutes for 4820-01-112-9843: 4820-00-036-1744, 4820-00-145-6282, 2920-00-175-9628 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of NMP229 PIECE 51?

Key specifications for NMP229 PIECE 51: Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.; Criticality Code Justification: ZZZY. 2 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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