PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

127951Seat,helical Compression Spring

Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp. · NSN 5340-00-118-2349 · FSC 5340 · No Item Name Available
Verified by PartsTable
NSN 5340-00-118-2349 — this item is cataloged by the U.S. Government under National Stock Number 5340-00-118-2349. Primary manufacturer part number: 127951.
Features
  • Seat,helical Compression Spring — FSC 5340
  • Material: STEEL COMP 4340
  • Material Document and Classification: AMS 6415 ASSN STD SINGLE MATERIAL RESPONSE
  • FSC Application Data: AIRCRAFT ENGINE R2000
  • Material Hardness Rating: 35.0 ROCKWELL C MINIMUM AND 240.0 ROCKWELL C MAXIMUM
  • 2 verified cross-references
  • Primary manufacturer: Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
Applications
  • Mechanical energy storage
  • Vibration dampening
  • Return mechanism operation
  • Applications requiring Steel Comp 4340 construction
General Description

The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-118-2349, is classified within Federal Supply Class 5340 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 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
NSN5340-00-118-2349
Primary Part Number127951
Item NameSeat,helical Compression Spring
FSC / FSG5340 / 53 — No Item Name Available
ManufacturerPratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
StatusACTIVE
MaterialSTEEL COMP 4340
Material Document and ClassificationAMS 6415 ASSN STD SINGLE MATERIAL RESPONSE
FSC Application DataAIRCRAFT ENGINE R2000
Material Hardness Rating35.0 ROCKWELL C MINIMUM AND 240.0 ROCKWELL C MAXIMUM
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
4730-00-012-79510112578 INTERCHANGEABLE
Plug,pipe
Rolls-Royce Solutions America Inc
5826-00-601-3392127951 INTERCHANGEABLE
Mechanism Assy
The Aeronautical Instrument and Radio Company Dba the Aeronautical Instrument and Radio Company Div the Aeronautical Instrument and
5945-01-500-8719380-0327-001 INTERCHANGEABLE
Relay,electromagnetic
Honeywell International Inc. Dba Honeywell Div Aerospace ? Redmond Commercial
4720-01-516-9526 INTERCHANGEABLE
Hose Assembly,nonmetallic
Cross-Reference Index
Part NumberManufacturer
127951 PRIMARY Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp. (CAN)
127951 Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA)
Related Parts
4730-00-012-7951INTERCHANGEABLE
PLUG,PIPE
0112578
5826-00-601-3392INTERCHANGEABLE
MECHANISM ASSY
127951
5945-01-500-8719INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
380-0327-001
4720-01-516-9526INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC

Frequently Asked Questions

What is NSN 5340-00-118-2349?

NSN 5340-00-118-2349 is a Seat,helical Compression Spring, manufactured by Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp., classified under FSC 5340 (No Item Name Available). Status: active.

What are the part numbers for NSN 5340-00-118-2349?

NSN 5340-00-118-2349 has 2 cross-referenced part numbers: 127951 (Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.), 127951 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).

What NSN replaces 5340-00-118-2349?

There are 4 known substitutes for 5340-00-118-2349: 4730-00-012-7951, 5826-00-601-3392, 5945-01-500-8719 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 127951?

Key specifications for 127951: Material: STEEL COMP 4340; Material Document and Classification: AMS 6415 ASSN STD SINGLE MATERIAL RESPONSE; FSC Application Data: AIRCRAFT ENGINE R2000; Material Hardness Rating: 35.0 ROCKWELL C MINIMUM AND 240.0 ROCKWELL C MAXIMUM. 4 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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