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PartsTable / COMPONENT / C318009868
C318009868 ✓ 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,KNURLED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303S OVERALL, nut_style: KNURLED, knurl_width: 0.187 INCHES NOMINAL IN, nut_diameter: 0.500 INCHES NOMINAL IN, thread_class: 3B, nut_thickness: 0.688 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-074-4882, 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
C318009868
NSN: 5310-00-074-4882
FSC: 5310
CAGE: 88818 — KEARFOTT CORPORATION DIV GUIDANCE AND NAVIGATION DIVISION (USA)
SPECIFICATIONS
materialSTEEL COMP 303S OVERALL
nut_styleKNURLED
knurl_width0.187 INCHES NOMINAL IN
nut_diameter0.500 INCHES NOMINAL IN
thread_class3B
nut_thickness0.688 INCHES NOMINAL IN
thread_seriesUNF
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
small_end_diameter0.375 INCHES NOMINAL IN
nominal_thread_size0.190 INCHES IN
thread_quantity_per_inch32
NSN5310-00-074-4882
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: C318009868 · 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
•
SMALL END DIAMETER: 0.375 INCHES NOMINAL IN
•
THREAD SERIES: UNF
•
NOMINAL THREAD SIZE: 0.190 INCHES IN
•
THREAD QUANTITY PER INCH: 32
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-7720 COMP 303S MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD CLASS: 3B
•
KNURL WIDTH: 0.187 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
SMALL END DIAMETER0.375 INCHES NOMINAL IN
THREAD SERIESUNF
NOMINAL THREAD SIZE0.190 INCHES IN
THREAD QUANTITY PER INCH32
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-7720 COMP 303S MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD CLASS3B
KNURL WIDTH0.187 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE OVERALL
NUT THICKNESS0.688 INCHES NOMINAL IN
NUT STYLEKNURLED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
40D87Interchangeable
interchangeable cross-reference
interchangeable
U15D28Interchangeable
interchangeable cross-reference
interchangeable
7802MInterchangeable
interchangeable cross-reference
interchangeable
10-33B-43 SYSTEM,OV HEAT/CABINE-Interchangeable
interchangeable cross-reference
interchangeable
4087Interchangeable
interchangeable cross-reference
interchangeable
82087Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C318009868?
C318009868 is a NUT,PLAIN,KNURLED.
What parts can replace C318009868?
There are 12 known substitutes for C318009868: 40D87, U15D28, 7802M and 9 more. Substitute compatibility should be verified for your specific system.
Is C318009868 still available?
C318009868 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026