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640628 — COUPLING,SHAFT,FLEXIBLE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

640628: COUPLING,SHAFT,FLEXIBLE.

The COUPLING,SHAFT,FLEXIBLE is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5315-00-266-4592, 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
640628
NSN: 5315-00-266-4592
NIINs: 002664592, 015718457
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
special_featuresCOUPLING IS SIZE 1.625 INCHES (MOTOR) X 1.375 INCHES (PUMP) WITH 2.00 INCH GAP MODEL 7SEMI; THIS UNIT SPEC'D FOR THE 500 GPM ASW PUMP IN
NSN5315-00-266-4592
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 640628 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
FIRST END TAPER LENGTH: 0.026 INCHES NOMINAL IN
•
FIRST END STYLE: CHAMFERED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-766,CL 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
FIRST END TAPER ANGLE: 10.0 DEGREES NOMINAL
•
PIN OVERALL DIAMETER: 0.1251 INCHES MINIMUM AND 0.1253 INCHES MAXIMUM IN
•
PIN OVERALL LENGTH: 0.375 INCHES NOMINAL IN
•
SECOND END RELATIONSHIP WITH FIRST END: NOT IDENTICAL
•
SECOND END STYLE: RADIUS
TECHNICAL CHARACTERISTICS
FIRST END TAPER LENGTH0.026 INCHES NOMINAL IN
FIRST END STYLECHAMFERED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-766,CL 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
FIRST END TAPER ANGLE10.0 DEGREES NOMINAL
PIN OVERALL DIAMETER0.1251 INCHES MINIMUM AND 0.1253 INCHES MAXIMUM IN
PIN OVERALL LENGTH0.375 INCHES NOMINAL IN
SECOND END RELATIONSHIP WITH FIRST ENDNOT IDENTICAL
SECOND END STYLERADIUS
MATERIALSTEEL CORROSION RESISTING OVERALL
SECOND END CORNER RADIUS0.047 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 7
166235PC46Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
177052PC92Reference document
Same NSN cross-reference
Reference document — Secondary reference
554274PC3Reference document
Same NSN cross-reference
Reference document — Secondary reference
592695PC6Reference document
Same NSN cross-reference
Reference document — Secondary reference
281476PC140Reference document
Same NSN cross-reference
Reference document — Secondary reference
42P7380-120Reference 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 640628?
640628 is a COUPLING,SHAFT,FLEXIBLE.
What parts can replace 640628?
There are 7 known substitutes for 640628: 166235PC46, 177052PC92, 554274PC3 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 640628?
640628 is cataloged in the U.S. Government catalog under NSN 5315-00-266-4592. 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.