PartsTable
Technical Data Sheet
2DD181 ✓ 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

The NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL NUT, nut_style: HEXAGON, nut_height: 0.438 INCHES MINIMUM AND 0.468 INCHES MAXIMUM IN, temp_rating: 250.0 FAHRENHEIT MAXIMUM DEGF, thread_class: 3B, thread_series: UNF. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-058-3353, 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
2DD181
NSN: 5310-01-058-3353
FSC: 5310
CAGE: 45152 — OSHKOSH CORP (USA)
SPECIFICATIONS
materialSTEEL NUT
nut_styleHEXAGON
nut_height0.438 INCHES MINIMUM AND 0.468 INCHES MAXIMUM IN
temp_rating250.0 FAHRENHEIT MAXIMUM DEGF
thread_class3B
thread_seriesUNF
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OR ZINC OVERALL EXCEPT INSERT
width_across_flats0.551 INCHES MINIMUM AND 0.565 INCHES MAXIMUM IN
nominal_thread_size0.375 INCHES IN
bearing_surface_typeCHAMFERED
NSN5310-01-058-3353
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2DD181 · 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 CLASS: 3B
THREAD DIRECTION: RIGHT-HAND
THREAD QUANTITY PER INCH: 24
THREAD SERIES: UNF
MATERIAL: STEEL NUT
BEARING SURFACE TYPE: CHAMFERED
NOMINAL THREAD SIZE: 0.375 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATION: GM 284-M FSCM 24617 MFR REF SINGLE MATERIAL RESPONSE NUT
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3B
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH24
THREAD SERIESUNF
MATERIALSTEEL NUT
BEARING SURFACE TYPECHAMFERED
NOMINAL THREAD SIZE0.375 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATIONGM 284-M FSCM 24617 MFR REF SINGLE MATERIAL RESPONSE NUT
MATERIALPLASTIC POLYAMIDE NYLON LOCKING INSERT
END ITEM IDENTIFICATIONNSN 2320-01-304-2277 PLS (PALLETIZED LOADING SYSTEM)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
30521Interchangeable
interchangeable cross-reference
interchangeable
21NE064Interchangeable
interchangeable cross-reference
interchangeable
2533408PC15Interchangeable
interchangeable cross-reference
interchangeable
192481Interchangeable
interchangeable cross-reference
interchangeable
77BInterchangeable
interchangeable cross-reference
interchangeable
573B27Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2DD181?
2DD181 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 2DD181?
There are 9 known substitutes for 2DD181: 30521, 21NE064, 2533408PC15 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2DD181?
2DD181 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-058-3353. This indicates validated use in U.S. government and defense supply chains.
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