PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

73769Ring,piston

Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator · NSN 3040-01-087-1294 · FSC 3040 · No Item Name Available
Verified by PartsTable
NSN 3040-01-087-1294 — this item is cataloged by the U.S. Government under National Stock Number 3040-01-087-1294. Primary manufacturer part number: 73769.
Features
  • Ring,piston — FSC 3040
  • Material: IRON OVERALL
  • 4 verified cross-references
  • Primary manufacturer: Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator
Applications
  • Applications requiring Iron Overall construction
General Description

The Ring,piston, cataloged under National Stock Number 3040-01-087-1294, is classified within Federal Supply Class 3040 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3040-01-087-1294
Primary Part Number73769
Item NameRing,piston
FSC / FSG3040 / 30 — No Item Name Available
ManufacturerEaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator
StatusACTIVE
MaterialIRON OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
6150-00-726-688473769 INTERCHANGEABLE
Lead,storage Battery
L3harris Technologies, Inc Div Space & Airborne Systems
4820-00-996-1132572029 INTERCHANGEABLE
Spool,hydraulic Val
Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division
4820-01-085-741173687-1 INTERCHANGEABLE
Poppet Assembly,valve
Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator
5330-01-086-44624615SH959M INTERCHANGEABLE
Ring,wiper
Parker-Hannifin Corporation Div Engineered Polymer Systems Division (eps)
4820-01-086-8703NL2111-1 INTERCHANGEABLE
Cup,locking
Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions
4820-01-092-889373689-1 INTERCHANGEABLE
Retainer Assembly,valve
Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator
4820-01-093-648573405 ITEM 49 INTERCHANGEABLE
Cup,locking
Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator
5305-01-121-255473405 ITEM 43 INTERCHANGEABLE
Screw,shoulder,valv
Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator
4810-01-190-3624 INTERCHANGEABLE
Coupling,valve
6515-01-466-2713R-734-05 INTERCHANGEABLE
Traction Apparatus,orthopedic
Allen Medical Systems Inc
Cross-Reference Index
Part NumberManufacturer
73769 PRIMARY Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator (USA)
73405 Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator (USA)
NK3150-1 Pentair Valves & Controls Us Lp Div Flow Control Us Holding Corp (USA)
73405 ITEM 30 Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator (USA)
Related Parts
6150-00-726-6884INTERCHANGEABLE
LEAD,STORAGE BATTERY
73769
4820-00-996-1132INTERCHANGEABLE
SPOOL,HYDRAULIC VAL
572029
4820-01-085-7411INTERCHANGEABLE
POPPET ASSEMBLY,VALVE
73687-1
5330-01-086-4462INTERCHANGEABLE
RING,WIPER
4615SH959M
4820-01-086-8703INTERCHANGEABLE
CUP,LOCKING
NL2111-1
4820-01-092-8893INTERCHANGEABLE
RETAINER ASSEMBLY,VALVE
73689-1
4820-01-093-6485INTERCHANGEABLE
CUP,LOCKING
73405 ITEM 49
5305-01-121-2554INTERCHANGEABLE
SCREW,SHOULDER,VALV
73405 ITEM 43
4810-01-190-3624INTERCHANGEABLE
COUPLING,VALVE
6515-01-466-2713INTERCHANGEABLE
TRACTION APPARATUS,ORTHOPEDIC
R-734-05

Frequently Asked Questions

What is NSN 3040-01-087-1294?

NSN 3040-01-087-1294 is a Ring,piston, manufactured by Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator, classified under FSC 3040 (No Item Name Available). Status: active.

What are the part numbers for NSN 3040-01-087-1294?

NSN 3040-01-087-1294 has 4 cross-referenced part numbers: 73769 (Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator), 73405 (Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator), NK3150-1 (Pentair Valves & Controls Us Lp Div Flow Control Us Holding Corp), 73405 ITEM 30 (Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator).

What NSN replaces 3040-01-087-1294?

There are 10 known substitutes for 3040-01-087-1294: 6150-00-726-6884, 4820-00-996-1132, 4820-01-085-7411 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 73769?

Key specifications for 73769: Material: IRON OVERALL; Special Features: FOR MAIN STEAM ROOT VALVE,10 IN. SIZE,600 PSI WP,OIL OPERATED IN. 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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