740285-7 — RING,PISTON

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

740285-7: RING,PISTON.

The RING,PISTON is a the manufacturer industrial component. Key specifications include material: RUBBER NATURAL OVERALL, ring_style: CONCENTRIC, joint_style: VERTICAL JOINT, overall_width: 0.1210 INCHES NOMINAL IN, radial_wall_thickness: 0.1350 INCHES NOMINAL IN, standard_bore_diameter: 3.938 INCHES IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-188-4185, 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

740285-7

NSN: 5310-00-188-4185
NIINs: 001884185, 010503255
FSC: 5310 — Nuts and Washers
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)

SPECIFICATIONS

material	RUBBER NATURAL OVERALL
ring_style	CONCENTRIC
joint_style	VERTICAL JOINT
overall_width	0.1210 INCHES NOMINAL IN
radial_wall_thickness	0.1350 INCHES NOMINAL IN
standard_bore_diameter	3.938 INCHES IN
cross-sectional_shape_style	PLAIN RECTANGULAR, STRAIGHT FACE
NSN	5310-00-188-4185

COMPONENT DIAGRAM

KEY FEATURES

•

OVERALL DIAMETER: 0.308 INCHES MINIMUM AND 0.318 INCHES MAXIMUM IN

•

HARDNESS RATING: 85.5 ROCKWELL B NOMINAL

•

MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL

•

CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR

•

SURFACE TREATMENT: ZINC OVERALL

•

PERIPHERAL SHAPE STYLE: ROUND

•

MATERIAL: STEEL COMP 1010 OVERALL

•

CENTER HOLE SHAPE STYLE: ROUND

TECHNICAL CHARACTERISTICS

OVERALL DIAMETER	0.308 INCHES MINIMUM AND 0.318 INCHES MAXIMUM IN
HARDNESS RATING	85.5 ROCKWELL B NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATION	SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLE	RECTANGULAR
SURFACE TREATMENT	ZINC OVERALL
PERIPHERAL SHAPE STYLE	ROUND
MATERIAL	STEEL COMP 1010 OVERALL
CENTER HOLE SHAPE STYLE	ROUND
HOLE DIAMETER	0.187 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
THICKNESS	0.017 INCHES MINIMUM AND 0.022 INCHES MAXIMUM IN

SUBSTITUTES & CROSS-REFERENCES 2

3219Reference document

Same NSN cross-reference

Reference document — Secondary reference

3219FReference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusCancelled· U.S. Government catalog

No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 740285-7?

740285-7 is a RING,PISTON.

What parts can replace 740285-7?

There are 2 known substitutes for 740285-7: 3219, 3219F. Substitute compatibility should be verified for your specific system.

What is the NSN for 740285-7?

740285-7 is cataloged in the U.S. Government catalog under NSN 5310-00-188-4185. This indicates validated use in U.S. government and defense supply chains.

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740285-7 — RING,PISTON

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