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801-6408784-85 — NUT,PLAIN,ROUND

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

801-6408784-85: NUT,PLAIN,ROUND.

The NUT,PLAIN,ROUND is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 544 OVERALL, thread_class: 3A A, thread_series: UN, thread_direction: RIGHT-HAND, nominal_thread_size: 2.125 INCHES IN, thread_quantity_per_inch: 16. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-359-3639, 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
801-6408784-85
NSN: 5310-01-359-3639
FSC: 5310 — Nuts and Washers
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialCOPPER ALLOY 544 OVERALL
thread_class3A A
thread_seriesUN
thread_directionRIGHT-HAND
nominal_thread_size2.125 INCHES IN
thread_quantity_per_inch16
material_document_and_classificationASTM B139 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-359-3639
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 801-6408784-85 · 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: UN
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM B139 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 2.125 INCHES IN
•
THREAD CLASS: 3A A
•
THREAD QUANTITY PER INCH: 16
•
MATERIAL: COPPER ALLOY 544 OVERALL
TECHNICAL CHARACTERISTICS
THREAD SERIESUN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM B139 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE2.125 INCHES IN
THREAD CLASS3A A
THREAD QUANTITY PER INCH16
MATERIALCOPPER ALLOY 544 OVERALL
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 1
801-6408784 FIND 85Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
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 801-6408784-85?
801-6408784-85 is a NUT,PLAIN,ROUND.
What parts can replace 801-6408784-85?
There is 1 known substitute for 801-6408784-85: 801-6408784 FIND 85. Substitute compatibility should be verified for your specific system.
What is the NSN for 801-6408784-85?
801-6408784-85 is cataloged in the U.S. Government catalog under NSN 5310-01-359-3639. 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.