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Compression Helical Spring

Model / MPN: 646B | NSN: 5360-01-139-4692
ITAR Registered seal

An open coiled spring, wound in various forms and from different shapes and types of materials and finished at the ends, designed to provide resistance to compression forces. Excludes springs designed for thermal actuation (springs in which the torsion forces are designed to be counteracted by changes in temperature) and spring, reinforcing, hose.

Product Details
NATO Stock Number
Sold in multiples of
1 EA
Inside Diameter
0.318 inches
End Style
E4 spring end, squared and ground both ends
Bore Diameter
0.500 inches
Spring Free Length
2.910 inches
Coil Quantity
Spring Solid Length
1.690 inches
Coil Helix Direction
Right-hand or left-hand
Spring Deflection Rate
33.800 pounds per inch
Spring Free Outside Diameter
0.470 inches
Steel comp 302
Material Specification
Sae, type 18-8 assn standard single material response
Surface Treatment
Style Designator

Pricing and Availability

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  • V-1810
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  • 307-WS
  • V-1810
  • 8646B