PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

400489Seat,oil Pressure Relief Valve

Rtx Corporation Div Pratt & Whitney · NSN 2945-00-784-4693 · FSC 2945 · No Item Name Available
Verified by PartsTable
NSN 2945-00-784-4693 — this item is cataloged by the U.S. Government under National Stock Number 2945-00-784-4693. Primary manufacturer part number: 400489.
Features
  • Seat,oil Pressure Relief Valve — FSC 2945
  • General Characteristics Item Description: PLASTIC POLYHEXAMETHYLENE AMIDE,AMS 3617; 0.961 IN. MIN AND 0.967 IN. MAX OD; 0.266 IN. MIN AND 0.270 IN. MAX THK; 0.570 IN. MIN AND 0.590 IN. MAX ID IN
  • 11 verified cross-references
  • Primary manufacturer: Rtx Corporation Div Pratt & Whitney
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Seat,oil Pressure Relief Valve, cataloged under National Stock Number 2945-00-784-4693, is classified within Federal Supply Class 2945 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is Rtx Corporation Div Pratt & Whitney. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 11 commercial cross-references from 11 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2945-00-784-4693
Primary Part Number400489
Item NameSeat,oil Pressure Relief Valve
FSC / FSG2945 / 29 — No Item Name Available
ManufacturerRtx Corporation Div Pratt & Whitney
StatusACTIVE
General Characteristics Item DescriptionPLASTIC POLYHEXAMETHYLENE AMIDE,AMS 3617; 0.961 IN. MIN AND 0.967 IN. MAX OD; 0.266 IN. MIN AND 0.270 IN. MAX THK; 0.570 IN. MIN AND 0.590 IN. MAX ID IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
3455-00-232-9046 INTERCHANGEABLE
Cutter,milling,side
5995-00-601-529040089 INTERCHANGEABLE
Cable Assembly,power,electrical
Unison Industries Llc
3030-01-264-054440089 INTERCHANGEABLE
Belt,positive Drive
Contitech Usa, Inc Dba Veyance Technologies
8465-01-541-799540089 INTERCHANGEABLE
Hydration System
Camelbak Products, Llc Dba Camelbak
Cross-Reference Index
Part NumberManufacturer
400489 Demusz Mfg. Co., Inc. (USA)
400489 Turbo Power & Marine System Inc Sub of United Technologies Corp (USA)
400489 Enjet Aero Bloomfield, Llc (USA)
400489 Agc Acquisition Llc Div Agc Acquisiton Llc (USA)
400489 Crane Co Dba Crane Polyflon Div Polyflon Company (USA)
400489 Hydromotive Div (USA)
400489 Dover Tool of Connecticut, Llc Div Na (USA)
400489 Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA)
40089 Union Machine Co of Lynn, Inc (USA)
400489 Electro-Methods, L.p. (USA)
400489 PRIMARY Rtx Corporation Div Pratt & Whitney (USA)
Related Parts
3455-00-232-9046INTERCHANGEABLE
CUTTER,MILLING,SIDE
5995-00-601-5290INTERCHANGEABLE
CABLE ASSEMBLY,POWER,ELECTRICAL
40089
3030-01-264-0544INTERCHANGEABLE
BELT,POSITIVE DRIVE
40089
8465-01-541-7995INTERCHANGEABLE
HYDRATION SYSTEM
40089

Frequently Asked Questions

What is NSN 2945-00-784-4693?

NSN 2945-00-784-4693 is a Seat,oil Pressure Relief Valve, manufactured by Rtx Corporation Div Pratt & Whitney, classified under FSC 2945 (No Item Name Available). Status: active.

What are the part numbers for NSN 2945-00-784-4693?

NSN 2945-00-784-4693 has 11 cross-referenced part numbers: 400489 (Demusz Mfg. Co., Inc.), 400489 (Turbo Power & Marine System Inc Sub of United Technologies Corp), 400489 (Enjet Aero Bloomfield, Llc), 400489 (Agc Acquisition Llc Div Agc Acquisiton Llc), 400489 (Crane Co Dba Crane Polyflon Div Polyflon Company) and 6 more.

What NSN replaces 2945-00-784-4693?

There are 4 known substitutes for 2945-00-784-4693: 3455-00-232-9046, 5995-00-601-5290, 3030-01-264-0544 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 400489?

Key specifications for 400489: General Characteristics Item Description: PLASTIC POLYHEXAMETHYLENE AMIDE,AMS 3617; 0.961 IN. MIN AND 0.967 IN. MAX OD; 0.266 IN. MIN AND 0.270 IN. MAX THK; 0.570 IN. MIN AND 0.590 IN. MAX ID IN. 1 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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