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Technical Data Sheet

AMD-1403 ITEM 40 — Technical Data Sheet

✓ 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,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304 OVERALL, nut_style: HEXAGON, nut_height: 0.320 INCHES MINIMUM AND 0.337 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), 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 under NSN 5310-01-429-2040, 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
AMD-1403 ITEM 40
NSN: 5310-01-429-2040
FSC: 5310
CAGE: 70433 — APPLETON MARINE INC (USA)
SPECIFICATIONS
materialSTEEL COMP 304 OVERALL
nut_styleHEXAGON
nut_height0.320 INCHES MINIMUM AND 0.337 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_across_flats0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
nominal_thread_size0.375 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
thread_quantity_per_inch16
departure_from_cited_documentAS MODIFIED BY MATERIAL.
NSN5310-01-429-2040
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: AMD-1403 ITEM 40 · 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
•
DEPARTURE FROM CITED DOCUMENT: AS MODIFIED BY MATERIAL.
•
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
•
THREAD QUANTITY PER INCH: 16
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
•
MATERIAL: STEEL COMP 304 OVERALL
•
WIDTH ACROSS FLATS: 0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS
DEPARTURE FROM CITED DOCUMENTAS MODIFIED BY MATERIAL.
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
THREAD QUANTITY PER INCH16
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
NOMINAL THREAD SIZE0.375 INCHES IN
MATERIALSTEEL COMP 304 OVERALL
WIDTH ACROSS FLATS0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
THREAD CLASS2B
SURFACE TREATMENTPASSIVATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
SCD90738-9InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
N4-3-20InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MS51971-3InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
203MS052P013InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
4912541-02InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
7237702P003InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AMD-1403 ITEM 40?
AMD-1403 ITEM 40 is a NUT,PLAIN,HEXAGON.
What parts can replace AMD-1403 ITEM 40?
There are 12 known substitutes for AMD-1403 ITEM 40: SCD90738-9, N4-3-20, MS51971-3 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AMD-1403 ITEM 40?
AMD-1403 ITEM 40 is cataloged in the Federal Logistics Information System under NSN 5310-01-429-2040. This indicates validated use in U.S. government and defense supply chains.
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