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MS13931 — RING,PISTON

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

MS13931: RING,PISTON.

The RING,PISTON is a the manufacturer industrial component. Key specifications include material: IRON OVERALL, ring_style: CONCENTRIC, joint_style: VERTICAL JOINT, overall_width: 0.1545 INCHES MINIMUM AND 0.1555 INCHES MAXIMUM IN, radial_wall_thickness: 0.1370 INCHES MINIMUM AND 0.1470 INCHES MAXIMUM IN, bore_diameter_oversize: 0.020 INCHES IN. This part is cataloged in the U.S.

Government catalog under NSN 2805-00-167-6848, 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
MS13931
NSN: 2805-00-167-6848
NIINs: 001676848, 005285806, 005556093
FSC: 2805 — Gasoline Reciprocating Engines, Except Aircraft; and Components
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialIRON OVERALL
ring_styleCONCENTRIC
joint_styleVERTICAL JOINT
overall_width0.1545 INCHES MINIMUM AND 0.1555 INCHES MAXIMUM IN
radial_wall_thickness0.1370 INCHES MINIMUM AND 0.1470 INCHES MAXIMUM IN
bore_diameter_oversize0.020 INCHES IN
standard_bore_diameter3.250 INCHES IN
cross-sectional_shape_styleCONVEX FACE, DOUBLE SCRAPER, VENTILATED OIL CONTROL
oil_passage_type_and_quantity1 GROOVE OUTSIDE PERIPHERY
material_document_and_classificationAMS 7310 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN2805-00-167-6848
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RING,PISTON TITLE COMPONENT PN MS13931 MFR RING,PISTON
KEY FEATURES
•
CROSS-SECTIONAL SHAPE STYLE: CONVEX FACE, DOUBLE SCRAPER, VENTILATED OIL CONTROL
•
JOINT STYLE: VERTICAL JOINT
•
RADIAL WALL THICKNESS: 0.1370 INCHES MINIMUM AND 0.1470 INCHES MAXIMUM IN
•
RING STYLE: CONCENTRIC
•
STANDARD BORE DIAMETER: 3.250 INCHES IN
•
MATERIAL: IRON OVERALL
TECHNICAL CHARACTERISTICS
OVERALL WIDTH0.1860 INCHES MINIMUM AND 0.1870 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLECONVEX FACE, DOUBLE SCRAPER, VENTILATED OIL CONTROL
JOINT STYLEVERTICAL JOINT
RADIAL WALL THICKNESS0.1370 INCHES MINIMUM AND 0.1470 INCHES MAXIMUM IN
RING STYLECONCENTRIC
STANDARD BORE DIAMETER3.250 INCHES IN
MATERIALIRON OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
MS13931-4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS13931?
MS13931 is a RING,PISTON.
What parts can replace MS13931?
There is 1 known substitute for MS13931: MS13931-4. Substitute compatibility should be verified for your specific system.
What is the NSN for MS13931?
MS13931 is cataloged in the U.S. Government catalog under NSN 2805-00-167-6848. 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.