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1491257 — NUT,PLAIN,CAP

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1491257: NUT,PLAIN,CAP.

The NUT,PLAIN,CAP is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, special_features: REPAIR PART FOR CENTRIFUGAL PUMP 4XZ16 NSN 4320-01-506-2047; STAINLESS STEEL; 7/16-20; ALSO CALLED ACORN NUT, thread_direction: RIGHT-HAND, nominal_thread_size: 0.438 INCHES IN, end_item_identification: 2HP CENTRIFUGAL PUMP 4XZ16 NSN 4320-01-506-2047, thread_quantity_per_inch: 20. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-506-3315, 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
1491257
NSN: 5310-01-506-3315
FSC: 5310 — Nuts and Washers
CAGE: 0LE36 — CONNECTRONICS CORP (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
special_featuresREPAIR PART FOR CENTRIFUGAL PUMP 4XZ16 NSN 4320-01-506-2047; STAINLESS STEEL; 7/16-20; ALSO CALLED ACORN NUT
thread_directionRIGHT-HAND
nominal_thread_size0.438 INCHES IN
end_item_identification2HP CENTRIFUGAL PUMP 4XZ16 NSN 4320-01-506-2047
thread_quantity_per_inch20
part_name_assigned_by_controlling_agencySTAINLESS STEEL ACORN NUT 7/16-20 FOR CENTRIFUGAL PUMP
NSN5310-01-506-3315
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1491257 · 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
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.438 INCHES IN
•
THREAD QUANTITY PER INCH: 20
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
TECHNICAL CHARACTERISTICS
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.438 INCHES IN
SPECIAL FEATURESREPAIR PART FOR CENTRIFUGAL PUMP 4XZ16 NSN 4320-01-506-2047; STAINLESS STEEL; 7/16-20; ALSO CALLED ACORN NUT
PART NAME ASSIGNED BY CONTROLLING AGENCYSTAINLESS STEEL ACORN NUT 7/16-20 FOR CENTRIFUGAL PUMP
END ITEM IDENTIFICATION2HP CENTRIFUGAL PUMP 4XZ16 NSN 4320-01-506-2047
THREAD QUANTITY PER INCH20
MATERIALSTEEL CORROSION RESISTING OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
03-0246Reference 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 1491257?
1491257 is a NUT,PLAIN,CAP.
What parts can replace 1491257?
There is 1 known substitute for 1491257: 03-0246. Substitute compatibility should be verified for your specific system.
What is the NSN for 1491257?
1491257 is cataloged in the U.S. Government catalog under NSN 5310-01-506-3315. 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.