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Worldwide distributor of NSN parts and consumables located in the USA.

Piston Ring

Model / MPN: 859989-10 | NSN: 2805-00-159-7792
ITAR Registered seal

A circular, single or multipiece item, metallic or nonmetallic in composition, designed to be fitted in a circumferential groove in a piston and to spring outward against the cylinder wall to function as a seal or wiper. It is supplied in various cross-sectional shapes and is cut through at one point to allow for installation in the piston ring groove. It may include an expander. Excludes packing, preformed; retainer, oil seal; retainer, packing; ring, retaining; ring wiper; and seal ring, metal.

Product Details
NATO Stock Number
2805-00-159-7792
Sold in multiples of
1 EA
DEMIL
DEMIL/MLI
Cross Sectional Shape
Plain rectangular, straight face
Ring Style
Concentric
Radial Wall Thickness
Between 0.1300 inches and 0.1400 inches
Overall Width
Between 0.0440 inches and 0.0450 inches
Standard Bore Diameter
2.900 inches
Joint Style
Vertical joint
Material
Stainless steel
Material Specification
Mil-s-25043 federal specification 1st material response and ams5528 assn standard 2nd material response
Fsc Application Data
Valve, modulation, enfironmental control refrigeration system
Solicitations
Solicitation Description Qty UOM Close Date
SPE7L216T3906 Ring, Piston 192 EA 06/06/2016
SPE7L217T1553 Ring, Piston 468 EA 02/17/2017
SPE7L217U0033 Ring, Piston 468 EA 04/03/2017

Pricing and Availability

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859989-10 Cross Reference
  • 859989-10
  • 859989-10