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4331040 — NUT,PLAIN,ROUND

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

4331040: NUT,PLAIN,ROUND.

The NUT,PLAIN,ROUND is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: ROUND, nut_diameter: 2.000 INCHES NOMINAL IN, thread_class: 2B, nut_thickness: 0.440 INCHES NOMINAL IN, thread_series: UNEF. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-168-7354, 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
4331040
NSN: 5310-00-168-7354
FSC: 5310 — Nuts and Washers
CAGE: 0AHU0 — KALMAR AC INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleROUND
nut_diameter2.000 INCHES NOMINAL IN
thread_class2B
nut_thickness0.440 INCHES NOMINAL IN
thread_seriesUNEF
thread_directionRIGHT-HAND
drive_point_depth0.094 INCHES NOMINAL IN
drive_point_width0.188 INCHES NOMINAL IN
nominal_thread_size1.375 INCHES IN
drive_point_quantity4
thread_quantity_per_inch18
NSN5310-00-168-7354
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4331040 · 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: UNEF
•
DRIVE POINT WIDTH: 0.188 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 1.375 INCHES IN
•
NUT DIAMETER: 2.000 INCHES NOMINAL IN
•
DRIVE POINT DEPTH: 0.094 INCHES NOMINAL IN
•
NUT THICKNESS: 0.440 INCHES NOMINAL IN
•
DRIVE POINT QUANTITY: 4
TECHNICAL CHARACTERISTICS
THREAD SERIESUNEF
DRIVE POINT WIDTH0.188 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.375 INCHES IN
NUT DIAMETER2.000 INCHES NOMINAL IN
DRIVE POINT DEPTH0.094 INCHES NOMINAL IN
NUT THICKNESS0.440 INCHES NOMINAL IN
DRIVE POINT QUANTITY4
NUT STYLEROUND
THREAD CLASS2B
SUBSTITUTES & CROSS-REFERENCES 1
A1933Reference 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 4331040?
4331040 is a NUT,PLAIN,ROUND.
What parts can replace 4331040?
There is 1 known substitute for 4331040: A1933. Substitute compatibility should be verified for your specific system.
What is the NSN for 4331040?
4331040 is cataloged in the U.S. Government catalog under NSN 5310-00-168-7354. 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.