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Technical Data Sheet
PartsTable / COMPONENT / 648972
648972 ✓ 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,ROUND is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 360 OVERALL, nut_style: ROUND, nut_diameter: 0.188 INCHES NOMINAL IN, thread_class: 2B, nut_thickness: 0.312 INCHES NOMINAL IN, thread_series: UNIFIED NATIONAL COARSE (UNC). This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-637-8353, 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
648972
NSN: 5310-00-637-8353
FSC: 5310
CAGE: 12436 — BAE SYSTEMS INFORMATION AND ELECTRONIC SYSTEMS INTEGRATION INC. DIV BAE SYSTEMS INFORMATION & ELECTRONIC SYSTEMS INTEGRATION INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY 360 OVERALL
nut_styleROUND
nut_diameter0.188 INCHES NOMINAL IN
thread_class2B
nut_thickness0.312 INCHES NOMINAL IN
thread_seriesUNIFIED NATIONAL COARSE (UNC)
thread_directionRIGHT-HAND
drive_point_depth0.048 INCHES NOMINAL IN
drive_point_width0.035 INCHES NOMINAL IN
surface_treatmentNICKEL OVERALL
nominal_thread_size0.112 INCHES IN
drive_point_quantity2
NSN5310-00-637-8353
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 648972 · 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 THICKNESS: 0.312 INCHES NOMINAL IN
•
SURFACE TREATMENT: NICKEL OVERALL
•
MATERIAL: COPPER ALLOY 360 OVERALL
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
NOMINAL THREAD SIZE: 0.112 INCHES IN
•
THREAD QUANTITY PER INCH: 40
•
DRIVE POINT WIDTH: 0.035 INCHES NOMINAL IN
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS (FLIS)
NUT THICKNESS0.312 INCHES NOMINAL IN
SURFACE TREATMENTNICKEL OVERALL
MATERIALCOPPER ALLOY 360 OVERALL
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
NOMINAL THREAD SIZE0.112 INCHES IN
THREAD QUANTITY PER INCH40
DRIVE POINT WIDTH0.035 INCHES NOMINAL IN
THREAD CLASS2B
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-611 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
857-200NInterchangeable
interchangeable cross-reference
interchangeable
308-0011Interchangeable
interchangeable cross-reference
interchangeable
00919Interchangeable
interchangeable cross-reference
interchangeable
33412Interchangeable
interchangeable cross-reference
interchangeable
NGC875CARInterchangeable
interchangeable cross-reference
interchangeable
UL726SM806WT-6FInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 648972?
648972 is a NUT,PLAIN,ROUND.
What parts can replace 648972?
There are 7 known substitutes for 648972: 857-200N, 308-0011, 00919 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 648972?
648972 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-637-8353. 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: July 2026