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6766356 — NUT,PLAIN,ROUND

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

6766356: NUT,PLAIN,ROUND.

The NUT,PLAIN,ROUND is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: ROUND, nut_diameter: 5.000 INCHES NOMINAL IN, thread_class: 3B, nut_thickness: 0.680 INCHES NOMINAL IN, thread_series: UN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-333-7374, 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
6766356
NSN: 5310-00-333-7374
FSC: 5310 — Nuts and Washers
CAGE: 73342 — ALLISON TRANSMISSION INC DBA ALLISON TRANSMISSION, INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleROUND
nut_diameter5.000 INCHES NOMINAL IN
thread_class3B
nut_thickness0.680 INCHES NOMINAL IN
thread_seriesUN
hardness_rating63.3 ROCKWELL C MINIMUM AND 66.3 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND
countersink_angle45.0 DEGREES NOMINAL NUT
drive_point_depth0.160 INCHES NOMINAL IN
drive_point_width0.380 INCHES NOMINAL IN
small_end_diameter3.640 INCHES NOMINAL IN
NSN5310-00-333-7374
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6766356 · 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: 63.3 ROCKWELL C MINIMUM AND 66.3 ROCKWELL C MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-T-825 ASSN STD ALL MATERIAL RESPONSES OVERALL
•
DRIVE POINT WIDTH: 0.380 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 3.500 INCHES IN
•
NUT DIAMETER: 5.000 INCHES NOMINAL IN
•
DRIVE POINT DEPTH: 0.160 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
THREAD SERIESUN
HARDNESS RATING63.3 ROCKWELL C MINIMUM AND 66.3 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-T-825 ASSN STD ALL MATERIAL RESPONSES OVERALL
DRIVE POINT WIDTH0.380 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE3.500 INCHES IN
NUT DIAMETER5.000 INCHES NOMINAL IN
DRIVE POINT DEPTH0.160 INCHES NOMINAL IN
UNDERCUT THICKNESS0.120 INCHES NOMINAL IN
NUT THICKNESS0.680 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 1
53103337374Reference 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 6766356?
6766356 is a NUT,PLAIN,ROUND.
What parts can replace 6766356?
There is 1 known substitute for 6766356: 53103337374. Substitute compatibility should be verified for your specific system.
What is the NSN for 6766356?
6766356 is cataloged in the U.S. Government catalog under NSN 5310-00-333-7374. 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.