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643967 — Technical Data Sheet

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— · 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: COPPER ALLOY OVERALL, nut_style: HEXAGON, nut_height: 0.380 INCHES NOMINAL IN, thread_class: 2B, thread_series: UN, 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 5310-00-470-7561, 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
643967
NSN: 5310-00-470-7561
FSC: 5310
CAGE: 28839 — TELEDYNE INDUSTRIES INC TELEDYNE POWER SYSTEMS DIV (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
nut_styleHEXAGON
nut_height0.380 INCHES NOMINAL IN
thread_class2B
thread_seriesUN
thread_directionRIGHT-HAND
width_across_flats0.438 INCHES NOMINAL IN
nominal_thread_size0.312 INCHES IN
bearing_surface_typeWASHER FACED
thread_quantity_per_inch28
NSN5310-00-470-7561
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 643967 · 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: 2B
•
WIDTH ACROSS FLATS: 0.438 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD SERIES: UN
•
BEARING SURFACE TYPE: WASHER FACED
•
THREAD QUANTITY PER INCH: 28
•
NOMINAL THREAD SIZE: 0.312 INCHES IN
•
MATERIAL: COPPER ALLOY OVERALL
TECHNICAL CHARACTERISTICS
THREAD CLASS2B
WIDTH ACROSS FLATS0.438 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
THREAD SERIESUN
BEARING SURFACE TYPEWASHER FACED
THREAD QUANTITY PER INCH28
NOMINAL THREAD SIZE0.312 INCHES IN
MATERIALCOPPER ALLOY OVERALL
NUT STYLEHEXAGON
NUT HEIGHT0.380 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
10525-1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
21247InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
8148650InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
B94.2InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
GGG-R-180 TY1CL1GRAInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
A-A-2928InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 643967?
643967 is a NUT,PLAIN,HEXAGON.
What parts can replace 643967?
There are 13 known substitutes for 643967: 10525-1, 21247, 8148650 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 643967?
643967 is cataloged in the Federal Logistics Information System under NSN 5310-00-470-7561. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: September 2026