PartsTable
Technical Data Sheet
643433 ✓ 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 4615 OVERALL, nut_style: HEXAGON, nut_height: 0.266 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNF, hardness_rating: 11.0 ROCKWELL C MINIMUM AND 17.0 ROCKWELL C MAXIMUM. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-514-4638, 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
643433
NSN: 5310-00-514-4638
FSC: 5310
CAGE: 58275 — SASCO INC CANADIAN DIV
SPECIFICATIONS
materialSTEEL COMP 4615 OVERALL
nut_styleHEXAGON
nut_height0.266 INCHES NOMINAL IN
thread_class3B
thread_seriesUNF
hardness_rating11.0 ROCKWELL C MINIMUM AND 17.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND
width_across_flats0.500 INCHES NOMINAL IN
nominal_thread_size0.375 INCHES IN
bearing_surface_typeWASHER FACED
thread_quantity_per_inch24
material_document_and_classificationSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-514-4638
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 643433 · 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: 0.266 INCHES NOMINAL IN
WIDTH ACROSS FLATS: 0.500 INCHES NOMINAL IN
THREAD QUANTITY PER INCH: 24
HARDNESS RATING: 11.0 ROCKWELL C MINIMUM AND 17.0 ROCKWELL C MAXIMUM
THREAD SERIES: UNF
BEARING SURFACE TYPE: WASHER FACED
NOMINAL THREAD SIZE: 0.375 INCHES IN
NUT STYLE: HEXAGON
TECHNICAL CHARACTERISTICS (FLIS)
NUT HEIGHT0.266 INCHES NOMINAL IN
WIDTH ACROSS FLATS0.500 INCHES NOMINAL IN
THREAD QUANTITY PER INCH24
HARDNESS RATING11.0 ROCKWELL C MINIMUM AND 17.0 ROCKWELL C MAXIMUM
THREAD SERIESUNF
BEARING SURFACE TYPEWASHER FACED
NOMINAL THREAD SIZE0.375 INCHES IN
NUT STYLEHEXAGON
MATERIALSTEEL COMP 4615 OVERALL
THREAD CLASS3B
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
186AInterchangeable
interchangeable cross-reference
interchangeable
10003969Interchangeable
interchangeable cross-reference
interchangeable
TV-401 TYPE2Interchangeable
interchangeable cross-reference
interchangeable
11739028Interchangeable
interchangeable cross-reference
interchangeable
9166-1Interchangeable
interchangeable cross-reference
interchangeable
75201A17Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 643433?
643433 is a NUT,PLAIN,HEXAGON.
What parts can replace 643433?
There are 19 known substitutes for 643433: 186A, 10003969, TV-401 TYPE2 and 16 more. Substitute compatibility should be verified for your specific system.
Is 643433 still available?
643433 is currently cancelled.
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