PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

83818Spring,helical,torsion

Pti Technologies Inc. · NSN 5360-01-342-8821 · FSC 5360 · No Item Name Available
Verified by PartsTable
NSN 5360-01-342-8821 — this item is cataloged by the U.S. Government under National Stock Number 5360-01-342-8821. Primary manufacturer part number: 83818.
Features
  • Spring,helical,torsion — FSC 5360
  • Coil Quantity: 5-1/2
  • Spring Free Outside Diameter: 1.840 INCHES NOMINAL IN
  • Surface Treatment: PASSIVATE OVERALL
  • Surface Treatment Document and Classification: MIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
  • End Angular Relationship: END W/LH HELIX OF COIL ANGLED TO CENTER SECTION
  • Style Designator: SINGLE TORSION LEFT HAND
  • Coil Helix Direction: RIGHT-HAND
Applications
  • Mechanical energy storage
  • Vibration dampening
  • Return mechanism operation
General Description

The Spring,helical,torsion, cataloged under National Stock Number 5360-01-342-8821, is classified within Federal Supply Class 5360 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Pti Technologies Inc.. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5360-01-342-8821
Primary Part Number83818
Item NameSpring,helical,torsion
FSC / FSG5360 / 53 — No Item Name Available
ManufacturerPti Technologies Inc.
StatusACTIVE
Coil Quantity5-1/2
Spring Free Outside Diameter1.840 INCHES NOMINAL IN
Surface TreatmentPASSIVATE OVERALL
Surface Treatment Document and ClassificationMIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
End Angular RelationshipEND W/LH HELIX OF COIL ANGLED TO CENTER SECTION
Style DesignatorSINGLE TORSION LEFT HAND
Coil Helix DirectionRIGHT-HAND
End StyleSTRAIGHT OFFSET OVERALL
Inside Diameter1.660 INCHES NOMINAL IN
Spring Free Length0.540 INCHES NOMINAL IN
End Length0.415 INCHES NOMINAL BOTH ENDS IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
2915-00-453-1133 INTERCHANGEABLE
Housing Bearing R
3455-00-504-1835 INTERCHANGEABLE
Knurl,machine
Cross-Reference Index
Part NumberManufacturer
83818 PRIMARY Pti Technologies Inc. (USA)
83818 Vacco Industries (USA)
83818 Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator (USA)
Related Parts
2915-00-453-1133INTERCHANGEABLE
HOUSING BEARING R
3455-00-504-1835INTERCHANGEABLE
KNURL,MACHINE

Frequently Asked Questions

What is NSN 5360-01-342-8821?

NSN 5360-01-342-8821 is a Spring,helical,torsion, manufactured by Pti Technologies Inc., classified under FSC 5360 (No Item Name Available). Status: active.

What are the part numbers for NSN 5360-01-342-8821?

NSN 5360-01-342-8821 has 3 cross-referenced part numbers: 83818 (Pti Technologies Inc.), 83818 (Vacco Industries), 83818 (Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator).

What NSN replaces 5360-01-342-8821?

There are 2 known substitutes for 5360-01-342-8821: 2915-00-453-1133, 3455-00-504-1835. Verify interchangeability with system specifications before substitution.

What are the specifications of 83818?

Key specifications for 83818: End Item Identification: W/S:HELICOPTER, SEAHAWK, H-60; HELICOPTER, SERACH AND RESCUE, HH-60H; HELICOPTER, USCG SEARCH AND RESCUE, HH-60J; HELICOPTER, CARRIER BASED ASW, SH-60F; HELICOPTER, LAMPS MARK III, SH-60B; Coil Quantity: 5-1/2; Spring Free Outside Diameter: 1.840 INCHES NOMINAL IN; Surface Treatment: PASSIVATE OVERALL. 12 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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