PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21028Spring,helical,compression

Hydro-Aire Aerospace Corp · NSN 5360-00-229-2871 · FSC 5360 · No Item Name Available
Verified by PartsTable
NSN 5360-00-229-2871 — this item is cataloged by the U.S. Government under National Stock Number 5360-00-229-2871. Primary manufacturer part number: 21028.
Features
  • Spring,helical,compression — FSC 5360
  • Spring Free Length: 0.376 INCHES NOMINAL IN
  • Material: STEEL OVERALL
  • Coil Quantity: 3
  • Material Document and Classification: MIL-S-6101 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Inside Diameter: 0.194 INCHES NOMINAL IN
  • Style Designator: CYLINDRICAL
  • Spring Free Outside Diameter: 0.388 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
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 5360-00-229-2871, is classified within Federal Supply Class 5360 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Hydro-Aire Aerospace Corp. Government technical data includes 11 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. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5360-00-229-2871
Primary Part Number21028
Item NameSpring,helical,compression
FSC / FSG5360 / 53 — No Item Name Available
ManufacturerHydro-Aire Aerospace Corp
StatusACTIVE
Spring Free Length0.376 INCHES NOMINAL IN
MaterialSTEEL OVERALL
Coil Quantity3
Material Document and ClassificationMIL-S-6101 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Inside Diameter0.194 INCHES NOMINAL IN
Style DesignatorCYLINDRICAL
Spring Free Outside Diameter0.388 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
Coil Helix DirectionRIGHT-HAND OR LEFT-HAND
Spring Deflection Rate4480.000 POUNDS PER INCH NOMINAL LBS
Spring Solid Length0.312 INCHES NOMINAL IN
End StyleSPRING END,SQUARED AND GROUND BOTH ENDS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
4810-00-237-026870000565 INTERCHANGEABLE
Seat,valve
Akron Brass Company
5905-00-566-1636 INTERCHANGEABLE
Resistor,variable,wire Wound,non
5940-00-577-0742 INTERCHANGEABLE
Terminal,lug
5945-00-911-988921-028 INTERCHANGEABLE
Relay,electromagnetic
Te Connectivity Corporation
2990-00-991-3657101901 INTERCHANGEABLE
Muffler,exhaust
Arvin Industries Inc
5940-01-529-329321028 INTERCHANGEABLE
Terminal Junction Block,sectiona
Gaylord Marine Services, Inc.
5340-01-588-260721-028 INTERCHANGEABLE
Strap,retaining
Hii Unmanned Systems, Inc
4940-01-723-105221028 INTERCHANGEABLE
Canister,pressurize,air Brush
Wd-40 Company
Cross-Reference Index
Part NumberManufacturer
21028 PRIMARY Hydro-Aire Aerospace Corp (USA)
Related Parts
4810-00-237-0268INTERCHANGEABLE
SEAT,VALVE
70000565
5905-00-566-1636INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,NON
5940-00-577-0742INTERCHANGEABLE
TERMINAL,LUG
5945-00-911-9889INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
21-028
2990-00-991-3657INTERCHANGEABLE
MUFFLER,EXHAUST
101901
5940-01-529-3293INTERCHANGEABLE
TERMINAL JUNCTION BLOCK,SECTIONA
21028
5340-01-588-2607INTERCHANGEABLE
STRAP,RETAINING
21-028
4940-01-723-1052INTERCHANGEABLE
CANISTER,PRESSURIZE,AIR BRUSH
21028

Frequently Asked Questions

What is NSN 5360-00-229-2871?

NSN 5360-00-229-2871 is a Spring,helical,compression, manufactured by Hydro-Aire Aerospace Corp, classified under FSC 5360 (No Item Name Available). Status: active.

What are the part numbers for NSN 5360-00-229-2871?

NSN 5360-00-229-2871 has 1 cross-referenced part number: 21028 (Hydro-Aire Aerospace Corp).

What NSN replaces 5360-00-229-2871?

There are 8 known substitutes for 5360-00-229-2871: 4810-00-237-0268, 5905-00-566-1636, 5940-00-577-0742 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21028?

Key specifications for 21028: Spring Free Length: 0.376 INCHES NOMINAL IN; Material: STEEL OVERALL; Coil Quantity: 3; Material Document and Classification: MIL-S-6101 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 11 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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