PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

18991Spring,helical,compression

American Seating Company Dba Secura · NSN 5360-00-675-8203 · FSC 5360 · No Item Name Available
Verified by PartsTable
NSN 5360-00-675-8203 — this item is cataloged by the U.S. Government under National Stock Number 5360-00-675-8203. Primary manufacturer part number: 18991.
Features
  • Spring,helical,compression — FSC 5360
  • Inside Diameter: 0.197 INCHES MINIMUM AND 0.207 INCHES MAXIMUM IN
  • Spring Free Outside Diameter: 0.323 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN
  • End Style: SPRING END,SQUARED AND GROUND BOTH ENDS
  • Material: STEEL OVERALL
  • Material Document and Classification: MIL-S-6101 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Spring Deflection Rate: 100.000 POUNDS PER INCH NOMINAL LBS
  • Coil Helix Direction: RIGHT-HAND OR LEFT-HAND
Applications
  • Mechanical energy storage
  • Vibration dampening
  • Return mechanism operation
  • Applications requiring Steel Overall construction
General Description

The Spring,helical,compression, cataloged under National Stock Number 5360-00-675-8203, is classified within Federal Supply Class 5360 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is American Seating Company Dba Secura. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5360-00-675-8203
Primary Part Number18991
Item NameSpring,helical,compression
FSC / FSG5360 / 53 — No Item Name Available
ManufacturerAmerican Seating Company Dba Secura
StatusACTIVE
Inside Diameter0.197 INCHES MINIMUM AND 0.207 INCHES MAXIMUM IN
Spring Free Outside Diameter0.323 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN
End StyleSPRING END,SQUARED AND GROUND BOTH ENDS
MaterialSTEEL OVERALL
Material Document and ClassificationMIL-S-6101 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Spring Deflection Rate100.000 POUNDS PER INCH NOMINAL LBS
Coil Helix DirectionRIGHT-HAND OR LEFT-HAND
Coil Quantity15
Spring Free Length1.343 INCHES NOMINAL IN
Style DesignatorCYLINDRICAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5950-00-883-8321SM-D-415279 INTERCHANGEABLE
Transformer,power
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
Cross-Reference Index
Part NumberManufacturer
18991 American Seating Company Dba Secura (USA)
Related Parts
5950-00-883-8321INTERCHANGEABLE
TRANSFORMER,POWER
SM-D-415279

Frequently Asked Questions

What is NSN 5360-00-675-8203?

NSN 5360-00-675-8203 is a Spring,helical,compression, manufactured by American Seating Company Dba Secura, classified under FSC 5360 (No Item Name Available). Status: active.

What are the part numbers for NSN 5360-00-675-8203?

NSN 5360-00-675-8203 has 1 cross-referenced part number: 18991 (American Seating Company Dba Secura).

What NSN replaces 5360-00-675-8203?

There is 1 known substitute for 5360-00-675-8203: 5950-00-883-8321. Verify interchangeability with system specifications before substitution.

What are the specifications of 18991?

Key specifications for 18991: Inside Diameter: 0.197 INCHES MINIMUM AND 0.207 INCHES MAXIMUM IN; Spring Free Outside Diameter: 0.323 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN; End Style: SPRING END,SQUARED AND GROUND BOTH ENDS; Material: STEEL OVERALL. 10 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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