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Technical Data Sheet
PartsTable / COMPONENT / 7287639 ITEM NO. 6
7287639 ITEM NO. 6 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The 7287639 ITEM NO. 6 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-004-6946, 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
7287639 ITEM NO. 6
NSN: 5310-01-004-6946
FSC: 5310
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
Part Number7287639 ITEM NO. 6
NSN5310-01-004-6946
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 7287639 ITEM NO. 6 · 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
•
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
•
NOMINAL THREAD SIZE: 0.625 INCHES IN
•
BEARING SURFACE FINISH: 125.0 MICROINCHES
•
COUNTERSINK ANGLE: 88.0 DEGREES NOMINAL NUT
•
THREAD DIRECTION: RIGHT-HAND
•
MATERIAL: PLASTIC POLYHEXAMETHYLENE AMIDE LOCKING INSERT
•
THREAD CLASS: 3B
TECHNICAL CHARACTERISTICS (FLIS)
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
NOMINAL THREAD SIZE0.625 INCHES IN
BEARING SURFACE FINISH125.0 MICROINCHES
COUNTERSINK ANGLE88.0 DEGREES NOMINAL NUT
THREAD DIRECTIONRIGHT-HAND
MATERIALPLASTIC POLYHEXAMETHYLENE AMIDE LOCKING INSERT
MATERIALNICKEL ALLOY 400 OR NICKEL ALLOY R-405 NUT
THREAD CLASS3B
MATERIAL DOCUMENT AND CLASSIFICATIONASTM D4066,COMP A,TYPE 1 ASSN STD SINGLE MATERIAL RESPONSE LOCKING INSERT
THREAD QUANTITY PER INCH11
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
U9NE-101Interchangeable
interchangeable cross-reference
interchangeable
09NE101Interchangeable
interchangeable cross-reference
interchangeable
801-6408784 FIND 178Interchangeable
interchangeable cross-reference
interchangeable
302707 FIND 14Interchangeable
interchangeable cross-reference
interchangeable
60-08-0429L1Interchangeable
interchangeable cross-reference
interchangeable
QQ-N-281 CL BInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 7287639 ITEM NO. 6?
7287639 ITEM NO. 6 is a 7287639 ITEM NO. 6.
What parts can replace 7287639 ITEM NO. 6?
There are 22 known substitutes for 7287639 ITEM NO. 6: U9NE-101, 09NE101, 801-6408784 FIND 178 and 19 more. Substitute compatibility should be verified for your specific system.
Is 7287639 ITEM NO. 6 still available?
7287639 ITEM NO. 6 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026