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PartsTable / COMPONENT / 00383
00383 ✓ 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

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: STEEL COMP 4340 OVERALL, nut_style: HEXAGON, thread_class: 2B, thread_series: UNEF, overall_height: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN, hardness_rating: 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-652-3406, 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
00383
NSN: 5310-00-652-3406
FSC: 5310
CAGE: 14153 — DEFENSE LOGISTICS AGENCY DBA DEFENSE SUPPLY CENTER PHILADELPHIA (USA)
SPECIFICATIONS
materialSTEEL COMP 4340 OVERALL
nut_styleHEXAGON
thread_class2B
thread_seriesUNEF
overall_height0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
hardness_rating34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
washer_thickness0.090 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
countersink_angle88.0 DEGREES MINIMUM AND 92.0 DEGREES MAXIMUM NUT
features_providedCASEHARDENED
width_across_flats1.115 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
NSN5310-00-652-3406
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 00383 · 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
•
WASHER OUTSIDE DIAMETER: 1.270 INCHES MINIMUM AND 1.280 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 4340 OVERALL
•
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
•
WASHER THICKNESS: 0.090 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
•
THREAD SERIES: UNEF
•
HARDNESS RATING: 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
•
THREAD QUANTITY PER INCH: 20
•
FEATURES PROVIDED: CASEHARDENED
TECHNICAL CHARACTERISTICS (FLIS)
WASHER OUTSIDE DIAMETER1.270 INCHES MINIMUM AND 1.280 INCHES MAXIMUM IN
MATERIALSTEEL COMP 4340 OVERALL
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
WASHER THICKNESS0.090 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
THREAD SERIESUNEF
HARDNESS RATING34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
THREAD QUANTITY PER INCH20
FEATURES PROVIDEDCASEHARDENED
NOMINAL THREAD SIZE0.938 INCHES IN
COUNTERSINK ANGLE88.0 DEGREES MINIMUM AND 92.0 DEGREES MAXIMUM NUT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
6LTR&2.5GAL WTR&FM PL-ITEM NO-19Interchangeable
interchangeable cross-reference
interchangeable
00383Interchangeable
interchangeable cross-reference
interchangeable
0383Interchangeable
interchangeable cross-reference
interchangeable
373678Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 00383?
00383 is a NUT,SELF-LOCKING,EXTENDED WASHER.
What parts can replace 00383?
There are 4 known substitutes for 00383: 6LTR&2.5GAL WTR&FM PL-ITEM NO-19, 00383, 0383 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 00383?
00383 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-652-3406. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026