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4639N — RING,PISTON

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

4639N: RING,PISTON.

The RING,PISTON is a the manufacturer industrial component. Key specifications include material: COPPER EXPANDER, ring_style: CONCENTRIC, joint_style: VERTICAL JOINT, overall_width: 0.1600 INCHES NOMINAL IN, radial_wall_thickness: 0.1400 INCHES NOMINAL IN, standard_bore_diameter: 4.625 INCHES IN. This part is cataloged in the U.S.

Government catalog under NSN 4310-00-101-2796, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
4639N
NSN: 4310-00-101-2796
FSC: 4310 — Compressors and Vacuum Pumps
CAGE: 93236 — DRESSER-RAND CO WORTHINGTON COMPRESSOR OPN A JOINT VENTURE (USA)
SPECIFICATIONS
materialCOPPER EXPANDER
ring_styleCONCENTRIC
joint_styleVERTICAL JOINT
overall_width0.1600 INCHES NOMINAL IN
radial_wall_thickness0.1400 INCHES NOMINAL IN
standard_bore_diameter4.625 INCHES IN
cross-sectional_shape_styleMULTI-PIECE STRAIGHT FACE, VENTILATED OIL CONTROL SPACER
NSN4310-00-101-2796
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RING,PISTON TITLE COMPONENT PN 4639N MFR RING,PISTON
KEY FEATURES
•
CROSS-SECTIONAL SHAPE STYLE: MULTI-PIECE STRAIGHT FACE, VENTILATED OIL CONTROL SPACER
•
JOINT STYLE: VERTICAL JOINT
•
RADIAL WALL THICKNESS: 0.1400 INCHES NOMINAL IN
•
RING STYLE: CONCENTRIC
•
STANDARD BORE DIAMETER: 4.625 INCHES IN
•
MATERIAL: STEEL TOP
TECHNICAL CHARACTERISTICS
OVERALL WIDTH0.1600 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEMULTI-PIECE STRAIGHT FACE, VENTILATED OIL CONTROL SPACER
JOINT STYLEVERTICAL JOINT
RADIAL WALL THICKNESS0.1400 INCHES NOMINAL IN
RING STYLECONCENTRIC
STANDARD BORE DIAMETER4.625 INCHES IN
MATERIALSTEEL TOP
MATERIALSTEEL BOTTOM
MATERIALCOPPER EXPANDER
OTHER ITEMS IN FSC 4310 — Compressors and Vacuum Pumps
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4310-00-000-0050 4310-00-001-0059 4310-00-001-2044 4310-00-001-3477 4310-00-001-3493 4310-00-001-6194 4310-00-001-6381 4310-00-001-7755
SUBSTITUTES & CROSS-REFERENCES 2
RNG1654Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
RNG01654AReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4639N?
4639N is a RING,PISTON.
What parts can replace 4639N?
There are 2 known substitutes for 4639N: RNG1654, RNG01654A. Substitute compatibility should be verified for your specific system.
What is the NSN for 4639N?
4639N is cataloged in the U.S. Government catalog under NSN 4310-00-101-2796. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.