3911A — RING,PISTON

✓ Government record, cited

— · COMPONENT

PRODUCT OVERVIEW

3911A: 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: 0.1870 INCHES NOMINAL IN, radial_wall_thickness: 0.1540 INCHES MINIMUM AND 0.1640 INCHES MAXIMUM IN, standard_bore_diameter: 3.750 INCHES IN. This part is cataloged in the U.S.

Government catalog under NSN 2805-00-274-3331, 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

3911A

NSN: 2805-00-274-3331
NIINs: 002743331, 008052644
FSC: 2805 — Gasoline Reciprocating Engines, Except Aircraft; and Components
CAGE: 65358 — TRACKMOBILE LLC (USA)

SPECIFICATIONS

material	IRON OVERALL
ring_style	CONCENTRIC
joint_style	VERTICAL JOINT
overall_width	0.1870 INCHES NOMINAL IN
radial_wall_thickness	0.1540 INCHES MINIMUM AND 0.1640 INCHES MAXIMUM IN
standard_bore_diameter	3.750 INCHES IN
cross-sectional_shape_style	STRAIGHT FACE, DOUBLE SCRAPER, VENTILATED OIL CONTROL
oil_passage_type_and_quantity	1 GROOVE OUTSIDE PERIPHERY
NSN	2805-00-274-3331

COMPONENT DIAGRAM

KEY FEATURES

•

MATERIAL DOCUMENT AND CLASSIFICATION: WS 85-1 MFR REF SINGLE MATERIAL RESPONSE OVERALL

•

CROSS-SECTIONAL SHAPE STYLE: STRAIGHT FACE, DOUBLE SCRAPER, VENTILATED OIL CONTROL

•

JOINT STYLE: VERTICAL JOINT

•

OIL PASSAGE TYPE AND QUANTITY: 1 GROOVE OUTSIDE PERIPHERY

•

RADIAL WALL THICKNESS: 0.1540 INCHES MINIMUM AND 0.1640 INCHES MAXIMUM IN

•

RING STYLE: CONCENTRIC

TECHNICAL CHARACTERISTICS

OVERALL WIDTH	0.1860 INCHES MINIMUM AND 0.1865 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION	WS 85-1 MFR REF SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLE	STRAIGHT FACE, DOUBLE SCRAPER, VENTILATED OIL CONTROL
JOINT STYLE	VERTICAL JOINT
OIL PASSAGE TYPE AND QUANTITY	1 GROOVE OUTSIDE PERIPHERY
OIL PASSAGE TYPE AND QUANTITY	8 SLOT HORIZONTALLY THROUGH RING
RADIAL WALL THICKNESS	0.1540 INCHES MINIMUM AND 0.1640 INCHES MAXIMUM IN
RING STYLE	CONCENTRIC
STANDARD BORE DIAMETER	3.750 INCHES IN
MATERIAL	IRON OVERALL

SUBSTITUTES & CROSS-REFERENCES 2

H3911AReference document

Same NSN cross-reference

Reference document — Secondary reference

78220AReference 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 3911A?

3911A is a RING,PISTON.

What parts can replace 3911A?

There are 2 known substitutes for 3911A: H3911A, 78220A. Substitute compatibility should be verified for your specific system.

What is the NSN for 3911A?

3911A is cataloged in the U.S. Government catalog under NSN 2805-00-274-3331. This indicates validated use in U.S. government and defense supply chains.

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3911A — RING,PISTON

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