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389570 — NUT,PLAIN,ROUND

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

389570: NUT,PLAIN,ROUND.

The NUT,PLAIN,ROUND is a the manufacturer industrial component. Key specifications include document_type: CATALOG SHEET, end_item_name: MISC PARTS LI, part_name_assigned_by_controlling_agency: RTES-END SEAL KIT. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-025-3859, 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
389570
NSN: 5310-01-025-3859
NIINs: 010253859, 016455347
FSC: 5310 — Nuts and Washers
CAGE: 0UBG9 — CURTISS-WRIGHT ELECTRO-MECHANICAL CORPORATION DIV EPD (USA)
SPECIFICATIONS
document_typeCATALOG SHEET
end_item_nameMISC PARTS LI
component_quantity4
part_name_assigned_by_controlling_agencyRTES-END SEAL KIT
NSN5310-01-025-3859
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 389570 · 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 SERIES: UNF
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281 FED SPEC ALL MATERIAL RESPONSES OVERALL
•
THREAD DIRECTION: LEFT-HAND
•
NOMINAL THREAD SIZE: 1.250 INCHES IN
•
NUT DIAMETER: 2.812 INCHES NOMINAL IN
•
DRIVE POINT DEPTH: 0.438 INCHES NOMINAL IN
•
NUT THICKNESS: 0.594 INCHES NOMINAL IN
•
DRIVE POINT DIAMETER: 0.281 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
THREAD SERIESUNF
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 FED SPEC ALL MATERIAL RESPONSES OVERALL
THREAD DIRECTIONLEFT-HAND
NOMINAL THREAD SIZE1.250 INCHES IN
NUT DIAMETER2.812 INCHES NOMINAL IN
DRIVE POINT DEPTH0.438 INCHES NOMINAL IN
NUT THICKNESS0.594 INCHES NOMINAL IN
DRIVE POINT DIAMETER0.281 INCHES NOMINAL IN
DRIVE POINT QUANTITY2
NUT STYLEROUND
SUBSTITUTES & CROSS-REFERENCES 2
389570-00Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
SK-189570-LHReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 389570?
389570 is a NUT,PLAIN,ROUND.
What parts can replace 389570?
There are 2 known substitutes for 389570: 389570-00, SK-189570-LH. Substitute compatibility should be verified for your specific system.
What is the NSN for 389570?
389570 is cataloged in the U.S. Government catalog under NSN 5310-01-025-3859. 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.