PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

54370Piston,valve

Eaton Aerospace Llc Dba Eaton Aerospace Jackson · NSN 4820-01-096-8899 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-096-8899 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-096-8899. Primary manufacturer part number: 54370.
Features
  • Piston,valve — FSC 4820
  • Material Document and Classification: MIL-B-24059 MIL SPEC SINGLE MATERIAL RESPONSE
  • Valve Model Number for Which Designed: 54370
  • Valve Type for Which Designed: RELIEF
  • Valve Design Control Activity: 99643
  • Material: COPPER ALLOY
  • 5 verified cross-references
  • Primary manufacturer: Eaton Aerospace Llc Dba Eaton Aerospace Jackson
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy construction
General Description

The Piston,valve, cataloged under National Stock Number 4820-01-096-8899, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Eaton Aerospace Llc Dba Eaton Aerospace Jackson. Government technical data includes 5 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
NSN4820-01-096-8899
Primary Part Number54370
Item NamePiston,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerEaton Aerospace Llc Dba Eaton Aerospace Jackson
StatusACTIVE
Material Document and ClassificationMIL-B-24059 MIL SPEC SINGLE MATERIAL RESPONSE
Valve Model Number for Which Designed54370
Valve Type for Which DesignedRELIEF
Valve Design Control Activity99643
MaterialCOPPER ALLOY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5330-00-026-339537819 INTERCHANGEABLE
Gasket
A. O. Smith Corporation Dba a O Smith Corp
5365-00-558-1644 INTERCHANGEABLE
Spacer,ring
4820-00-621-5755N3781994 INTERCHANGEABLE
Diaphragm,valve,flat
Leslie Controls, Inc. Dba Leslie Controls Inc
5330-00-641-6975288047 INTERCHANGEABLE
Seal,plain Encased
Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney
8010-00-878-5761 INTERCHANGEABLE
Enamel
5307-00-881-244137819 INTERCHANGEABLE
Stud,plain
L3harris Technologies, Inc. Div Space and Airborne Systems
3110-00-902-3758071006 INTERCHANGEABLE
Bearing,roller,needle
Zf Active Safety and Electronics Us Llc Div Trw Commercial Steering Systems
9540-01-071-6526 INTERCHANGEABLE
Angle,structural
3230-01-085-519154370 INTERCHANGEABLE
Blade,jig Saw,woodworking
Black and Decker Us Inc
4820-01-273-128354370-31 INTERCHANGEABLE
Valve,safety Relief
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
Cross-Reference Index
Part NumberManufacturer
54370 Eaton Aerospace Llc Dba Eaton Aerospace Jackson (USA)
37819 Eaton Aerospace Llc Dba Eaton Aerospace Jackson (USA)
54370-900 ITEM NO. 7CP Naval Inventory Control Point Mechanicsburg (USA)
37819CP Naval Inventory Control Point Mechanicsburg (USA)
54370-900 ITEM NO. 7 Eaton Aerospace Llc Dba Eaton Aerospace Jackson (USA)
Related Parts
5330-00-026-3395INTERCHANGEABLE
GASKET
37819
5365-00-558-1644INTERCHANGEABLE
SPACER,RING
4820-00-621-5755INTERCHANGEABLE
DIAPHRAGM,VALVE,FLAT
N3781994
5330-00-641-6975INTERCHANGEABLE
SEAL,PLAIN ENCASED
288047
8010-00-878-5761INTERCHANGEABLE
ENAMEL
5307-00-881-2441INTERCHANGEABLE
STUD,PLAIN
37819
3110-00-902-3758INTERCHANGEABLE
BEARING,ROLLER,NEEDLE
071006
9540-01-071-6526INTERCHANGEABLE
ANGLE,STRUCTURAL
3230-01-085-5191INTERCHANGEABLE
BLADE,JIG SAW,WOODWORKING
54370
4820-01-273-1283INTERCHANGEABLE
VALVE,SAFETY RELIEF
54370-31
4710-01-396-5180INTERCHANGEABLE
TUBE AND FITTINGS,METALLIC
37819
6150-01-412-7657INTERCHANGEABLE
WIRING HARNESS,BRANCHED
37819

Frequently Asked Questions

What is NSN 4820-01-096-8899?

NSN 4820-01-096-8899 is a Piston,valve, manufactured by Eaton Aerospace Llc Dba Eaton Aerospace Jackson, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-096-8899?

NSN 4820-01-096-8899 has 5 cross-referenced part numbers: 54370 (Eaton Aerospace Llc Dba Eaton Aerospace Jackson), 37819 (Eaton Aerospace Llc Dba Eaton Aerospace Jackson), 54370-900 ITEM NO. 7CP (Naval Inventory Control Point Mechanicsburg), 37819CP (Naval Inventory Control Point Mechanicsburg), 54370-900 ITEM NO. 7 (Eaton Aerospace Llc Dba Eaton Aerospace Jackson).

What NSN replaces 4820-01-096-8899?

There are 12 known substitutes for 4820-01-096-8899: 5330-00-026-3395, 5365-00-558-1644, 4820-00-621-5755 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 54370?

Key specifications for 54370: Material Document and Classification: MIL-B-24059 MIL SPEC SINGLE MATERIAL RESPONSE; Valve Model Number for Which Designed: 54370; Valve Type for Which Designed: RELIEF; Valve Design Control Activity: 99643. 5 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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