PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

28877NValve,regulating,fluid Pressure

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-01-221-4324 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-221-4324 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-221-4324. Primary manufacturer part number: 28877N.
Features
  • Valve,regulating,fluid Pressure — FSC 4820
  • Criticality Code Justification: ZZZY
  • Reference Number Differentiating Characteristics: SELECTED,TESTED AND CERTIFIED FOR TRIDENT SUBMARINE APPLICATION; MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
  • 6 verified cross-references
  • Primary manufacturer: Leslie Controls, Inc. Dba Leslie Controls Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-221-4324, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Leslie Controls, Inc. Dba Leslie Controls Inc. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 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
NSN4820-01-221-4324
Primary Part Number28877N
Item NameValve,regulating,fluid Pressure
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeslie Controls, Inc. Dba Leslie Controls Inc
StatusACTIVE
Criticality Code JustificationZZZY
Reference Number Differentiating CharacteristicsSELECTED,TESTED AND CERTIFIED FOR TRIDENT SUBMARINE APPLICATION; MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4820-01-215-1564N683790058 INTERCHANGEABLE
Seat,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-215-1628N67370 INTERCHANGEABLE
Column,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-215-240128877N ITEM 27 INTERCHANGEABLE
Guide,valve Stem
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-216-112728877N ITEM 5 INTERCHANGEABLE
Cap,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-216-2365N68444 INTERCHANGEABLE
Ring,dampening
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-216-2366N67374 INTERCHANGEABLE
Case,helical Compression Spring
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-216-251728877N ITEM 29 INTERCHANGEABLE
Disk,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-217-008667944-0058 INTERCHANGEABLE
Piston,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-217-1183N67383 INTERCHANGEABLE
Disk,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-218-0067N674030057 INTERCHANGEABLE
Diaphragm Base,complete
Leslie Controls, Inc. Dba Leslie Controls Inc
Cross-Reference Index
Part NumberManufacturer
28877N Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
28877N-1.5 INL1 Naval Inventory Control Point Mechanicsburg (USA)
28877NTR Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
28877N-1.5 IN Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
28877NL1 Naval Inventory Control Point Mechanicsburg (USA)
28877NTR L1 Naval Inventory Control Point Mechanicsburg (USA)
Related Parts
4820-01-215-1564INTERCHANGEABLE
SEAT,VALVE
N683790058
4820-01-215-1628INTERCHANGEABLE
COLUMN,VALVE
N67370
4820-01-215-2401INTERCHANGEABLE
GUIDE,VALVE STEM
28877N ITEM 27
4820-01-216-1127INTERCHANGEABLE
CAP,VALVE
28877N ITEM 5
4820-01-216-2365INTERCHANGEABLE
RING,DAMPENING
N68444
4820-01-216-2366INTERCHANGEABLE
CASE,HELICAL COMPRESSION SPRING
N67374
4820-01-216-2517INTERCHANGEABLE
DISK,VALVE
28877N ITEM 29
4820-01-217-0086INTERCHANGEABLE
PISTON,VALVE
67944-0058
4820-01-217-1183INTERCHANGEABLE
DISK,VALVE
N67383
4820-01-218-0067INTERCHANGEABLE
DIAPHRAGM BASE,COMPLETE
N674030057
4820-01-224-4190INTERCHANGEABLE
REGULATOR,TEMPERATURE AND PRESSU
N68378
4820-01-422-0423INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE

Frequently Asked Questions

What is NSN 4820-01-221-4324?

NSN 4820-01-221-4324 is a Valve,regulating,fluid Pressure, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-221-4324?

NSN 4820-01-221-4324 has 6 cross-referenced part numbers: 28877N (Leslie Controls, Inc. Dba Leslie Controls Inc), 28877N-1.5 INL1 (Naval Inventory Control Point Mechanicsburg), 28877NTR (Leslie Controls, Inc. Dba Leslie Controls Inc), 28877N-1.5 IN (Leslie Controls, Inc. Dba Leslie Controls Inc), 28877NL1 (Naval Inventory Control Point Mechanicsburg) and 1 more.

What NSN replaces 4820-01-221-4324?

There are 12 known substitutes for 4820-01-221-4324: 4820-01-215-1564, 4820-01-215-1628, 4820-01-215-2401 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 28877N?

Key specifications for 28877N: Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: SELECTED,TESTED AND CERTIFIED FOR TRIDENT SUBMARINE APPLICATION; MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS. 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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