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Technical Data Sheet
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65640-1 — Technical Data Sheet

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— · BALL BEARING
WHAT YOU NEED TO KNOW
2RS = sealed for life, ZZ = shielded re-greaseable ABEC grade: higher = tighter tolerance
ABEC-1 standard, ABEC-7+ for precision spindles
PRODUCT OVERVIEW

The RESTRICTOR,FLUID FLOW is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY, end_item_identification: STRATEGIC SEALIFT CONVERSION SHIPS CLASS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 3120-00-431-1643, 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
65640-1
NSN: 3120-00-431-1643
FSC: 3120
CAGE: 12603 — CLARK EQUIPMENT CO (USA)
SPECIFICATIONS
materialCOPPER ALLOY
end_item_identificationSTRATEGIC SEALIFT CONVERSION SHIPS CLASS
NSN3120-00-431-1643
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 65640-1 · OEM ⚠ VERIFY BEFORE ORDERING ABEC grade: higher = tighter tolerance = higher cost. ABEC-1 is standard, ABEC-7+ for precision spindles. Open, shielded (ZZ), and sealed (2RS) versions have different max RPM ratings ✓ BROKER TIP 2RS = sealed for life (no maintenance). ZZ = shielded, re-greaseable. Open = must lubricate on install. Common interchange: 6205-2RS = 6205-2RSR = 6205-DDU (same bearing, different suffix) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CORNER SHAPE: SQUARE ALL CORNERS
•
BODY INSIDE DIAMETER: 0.5020 INCHES MINIMUM AND 0.5030 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SOLID, PLAIN, NO OUTSIDE FLANGES
•
MATERIAL: COPPER ALLOY OVERALL
•
BODY OUTSIDE DIAMETER: 0.6270 INCHES MINIMUM AND 0.6280 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-B-5697,TY 1,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
CORNER SHAPESQUARE ALL CORNERS
BODY INSIDE DIAMETER0.5020 INCHES MINIMUM AND 0.5030 INCHES MAXIMUM IN
STYLE DESIGNATORSOLID, PLAIN, NO OUTSIDE FLANGES
MATERIALCOPPER ALLOY OVERALL
MATERIALOIL LUBRICATING LUBRICATION
BODY OUTSIDE DIAMETER0.6270 INCHES MINIMUM AND 0.6280 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-B-5697,TY 1,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
OVERALL LENGTH1.0000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
A6942InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
7347343InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
6564B-01InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
6562 REV C ITEM 4InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
65640-001InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
10161InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 65640-1?
65640-1 is a RESTRICTOR,FLUID FLOW.
What parts can replace 65640-1?
There are 8 known substitutes for 65640-1: A6942, 7347343, 6564B-01 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 65640-1?
65640-1 is cataloged in the Federal Logistics Information System under NSN 3120-00-431-1643. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: October 2026