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6764681 — NUT,PLAIN,ROUND

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

6764681: NUT,PLAIN,ROUND.

The NUT,PLAIN,ROUND is a the manufacturer industrial component. Key specifications include material: STEEL COMP 8740 OVERALL, nut_diameter: 3.188 INCHES NOMINAL IN, thread_class: 2B, nut_thickness: 0.438 INCHES NOMINAL IN, thread_series: UN, hardness_rating: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-753-9887, 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
6764681
NSN: 5310-00-753-9887
FSC: 5310 — Nuts and Washers
CAGE: 24617 — GENERAL MOTORS CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 8740 OVERALL
nut_diameter3.188 INCHES NOMINAL IN
thread_class2B
nut_thickness0.438 INCHES NOMINAL IN
thread_seriesUN
hardness_rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND
drive_point_width0.250 INCHES NOMINAL IN
small_end_diameter2.438 INCHES NOMINAL IN
nominal_thread_size1.938 INCHES IN
drive_point_quantity5
drilled_hole_diameter0.156 INCHES NOMINAL IN
NSN5310-00-753-9887
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6764681 · 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
•
HARDNESS RATING: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
•
HOLE CONFIGURATION STYLE: CONFIGURATION F
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
DRIVE POINT WIDTH: 0.250 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 1.938 INCHES IN
•
NUT DIAMETER: 3.188 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
THREAD SERIESUN
HARDNESS RATING26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
HOLE CONFIGURATION STYLECONFIGURATION F
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
DRIVE POINT WIDTH0.250 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.938 INCHES IN
NUT DIAMETER3.188 INCHES NOMINAL IN
NUT THICKNESS0.438 INCHES NOMINAL IN
SMALL END DIAMETER2.438 INCHES NOMINAL IN
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 3
62.71.037Reference document
Same NSN cross-reference
Reference document — Secondary reference
5310007539887Reference document
Same NSN cross-reference
Reference document — Informative reference only
53107539887Reference document
Same NSN cross-reference
Reference document — Informative reference only
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 6764681?
6764681 is a NUT,PLAIN,ROUND.
What parts can replace 6764681?
There are 3 known substitutes for 6764681: 62.71.037, 5310007539887, 53107539887. Substitute compatibility should be verified for your specific system.
What is the NSN for 6764681?
6764681 is cataloged in the U.S. Government catalog under NSN 5310-00-753-9887. 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.