PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A661Spring,helical,compression

Crane Co Div Valve Div · NSN 5360-00-266-4278 · FSC 5360 · No Item Name Available
Verified by PartsTable
NSN 5360-00-266-4278 — this item is cataloged by the U.S. Government under National Stock Number 5360-00-266-4278. Primary manufacturer part number: A661.
Features
  • Spring,helical,compression — FSC 5360
  • Style Designator: CYLINDRICAL
  • End Style: SPRING END,SQUARED AND GROUND BOTH ENDS
  • Inside Diameter: 0.438 INCHES NOMINAL IN
  • Spring Solid Length: 0.719 INCHES NOMINAL IN
  • Material: STEEL OVERALL
  • Spring Free Outside Diameter: 0.622 INCHES NOMINAL IN
  • Coil Quantity: 7-1/2
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 5360-00-266-4278, is classified within Federal Supply Class 5360 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Crane Co Div Valve Div. Government technical data includes 9 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
NSN5360-00-266-4278
Primary Part NumberA661
Item NameSpring,helical,compression
FSC / FSG5360 / 53 — No Item Name Available
ManufacturerCrane Co Div Valve Div
StatusACTIVE
Style DesignatorCYLINDRICAL
End StyleSPRING END,SQUARED AND GROUND BOTH ENDS
Inside Diameter0.438 INCHES NOMINAL IN
Spring Solid Length0.719 INCHES NOMINAL IN
MaterialSTEEL OVERALL
Spring Free Outside Diameter0.622 INCHES NOMINAL IN
Coil Quantity7-1/2
Coil Helix DirectionLEFT-HAND
Spring Free Length1.250 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5325-00-763-5017 INTERCHANGEABLE
Eyelet,metallic
5325-01-085-3938A661 INTERCHANGEABLE
Eyelet,metallic
Edwin B. Stimpson Company, Inc. Dba Stimpson
5920-01-132-2681 INTERCHANGEABLE
Lightning Rod
8040-01-342-1511 INTERCHANGEABLE
Adhesive
Cross-Reference Index
Part NumberManufacturer
HR22869 Ecolaire Inc Baldwin-Hamilton Co Div (USA)
A661 PRIMARY Crane Co Div Valve Div (USA)
Related Parts
5325-00-763-5017INTERCHANGEABLE
EYELET,METALLIC
5325-01-085-3938INTERCHANGEABLE
EYELET,METALLIC
A661
5920-01-132-2681INTERCHANGEABLE
LIGHTNING ROD
8040-01-342-1511INTERCHANGEABLE
ADHESIVE

Frequently Asked Questions

What is NSN 5360-00-266-4278?

NSN 5360-00-266-4278 is a Spring,helical,compression, manufactured by Crane Co Div Valve Div, classified under FSC 5360 (No Item Name Available). Status: active.

What are the part numbers for NSN 5360-00-266-4278?

NSN 5360-00-266-4278 has 2 cross-referenced part numbers: HR22869 (Ecolaire Inc Baldwin-Hamilton Co Div), A661 (Crane Co Div Valve Div).

What NSN replaces 5360-00-266-4278?

There are 4 known substitutes for 5360-00-266-4278: 5325-00-763-5017, 5325-01-085-3938, 5920-01-132-2681 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A661?

Key specifications for A661: Style Designator: CYLINDRICAL; End Style: SPRING END,SQUARED AND GROUND BOTH ENDS; Inside Diameter: 0.438 INCHES NOMINAL IN; Spring Solid Length: 0.719 INCHES NOMINAL IN. 9 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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