PartsTable
Technical Data Sheet
16A4C7 ✓ 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 OVERALL, nut_style: HEXAGON, nut_height: 0.535 INCHES MINIMUM AND 0.559 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), hardness_rating: 95.0 ROCKWELL B MINIMUM AND 32.0 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 5310-00-266-0389, 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
16A4C7
NSN: 5310-00-266-0389
FSC: 5310
CAGE: 0UBG9 — CURTISS-WRIGHT ELECTRO-MECHANICAL CORPORATION DIV EPD (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.535 INCHES MINIMUM AND 0.559 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
hardness_rating95.0 ROCKWELL B MINIMUM AND 32.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE OVERALL
width_across_flats0.9220 INCHES MINIMUM AND 0.9375 INCHES MAXIMUM IN
nominal_thread_size0.625 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
end_item_identificationLOGISTICS SUPPORT VESSEL
NSN5310-00-266-0389
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 16A4C7 · 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: 0.535 INCHES MINIMUM AND 0.559 INCHES MAXIMUM IN
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
NOMINAL THREAD SIZE: 0.625 INCHES IN
THREAD QUANTITY PER INCH: 11
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
NUT STYLE: HEXAGON
MATERIAL: STEEL OVERALL
NONDEFINITIVE SPEC/STD DATA: 2 TYPE AND 13 STYLE
TECHNICAL CHARACTERISTICS (FLIS)
NUT HEIGHT0.535 INCHES MINIMUM AND 0.559 INCHES MAXIMUM IN
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
NOMINAL THREAD SIZE0.625 INCHES IN
THREAD QUANTITY PER INCH11
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
NUT STYLEHEXAGON
MATERIALSTEEL OVERALL
NONDEFINITIVE SPEC/STD DATA2 TYPE AND 13 STYLE
THREAD CLASS2B
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
XX003-1474Interchangeable
interchangeable cross-reference
interchangeable
253871 PC NO 23Interchangeable
interchangeable cross-reference
interchangeable
MS51967-20Interchangeable
interchangeable cross-reference
interchangeable
16A4C7FM2Interchangeable
Same NIIN cross-reference
interchangeable
17A4C7Interchangeable
Same NIIN cross-reference
interchangeable
FFN836Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 16A4C7?
16A4C7 is a NUT,PLAIN,HEXAGON.
What parts can replace 16A4C7?
There are 6 known substitutes for 16A4C7: XX003-1474, 253871 PC NO 23, MS51967-20 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 16A4C7?
16A4C7 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-266-0389. This indicates validated use in U.S. government and defense supply chains.
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