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Technical Data Sheet
2A40631A05 ✓ 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,PLAIN,SQUARE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1010 OVERALL, nut_style: SQUARE, nut_height: 0.120 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNF, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-343-1500, 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
2A40631A05
NSN: 5310-00-343-1500
FSC: 5310
CAGE: 94990 — MOTOROLA INC. DBA INTEGRATED INFORMATION SYSTEMS GROUP (USA)
SPECIFICATIONS
materialSTEEL COMP 1010 OVERALL
nut_styleSQUARE
nut_height0.120 INCHES NOMINAL IN
thread_class2B
thread_seriesUNF
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE OVERALL
width_across_flats0.375 INCHES NOMINAL IN
nominal_thread_size0.190 INCHES IN
bearing_surface_typeFLAT
thread_quantity_per_inch32
material_document_and_classificationSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-343-1500
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2A40631A05 · 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
NUT HEIGHT: 0.120 INCHES NOMINAL IN
THREAD CLASS: 2B
THREAD QUANTITY PER INCH: 32
THREAD SERIES: UNF
NOMINAL THREAD SIZE: 0.190 INCHES IN
BEARING SURFACE TYPE: FLAT
WIDTH ACROSS FLATS: 0.375 INCHES NOMINAL IN
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
NUT HEIGHT0.120 INCHES NOMINAL IN
THREAD CLASS2B
THREAD QUANTITY PER INCH32
THREAD SERIESUNF
NOMINAL THREAD SIZE0.190 INCHES IN
BEARING SURFACE TYPEFLAT
WIDTH ACROSS FLATS0.375 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 1010 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
2410 1-25/32Interchangeable
interchangeable cross-reference
interchangeable
T-100Interchangeable
interchangeable cross-reference
interchangeable
53214Interchangeable
interchangeable cross-reference
interchangeable
201-50Interchangeable
interchangeable cross-reference
interchangeable
NDC00467-3201-25Interchangeable
interchangeable cross-reference
interchangeable
NDC00641-2390-45Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2A40631A05?
2A40631A05 is a NUT,PLAIN,SQUARE.
What parts can replace 2A40631A05?
There are 14 known substitutes for 2A40631A05: 2410 1-25/32, T-100, 53214 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2A40631A05?
2A40631A05 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-343-1500. This indicates validated use in U.S. government and defense supply chains.
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