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25-00318 ✓ 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

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: IRON ALLOY 660 OVERALL, nut_style: HEXAGON, lubrication: DRY FILM LUBRICANT, temp_rating: 500.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B, thread_series: UNIFIED NATIONAL COARSE (UNC). This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-213-9675, 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
25-00318
NSN: 5310-01-213-9675
FSC: 5310
CAGE: 00724 — RAYTHEON COMPANY (USA)
SPECIFICATIONS
materialIRON ALLOY 660 OVERALL
nut_styleHEXAGON
lubricationDRY FILM LUBRICANT
temp_rating500.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
overall_height0.110 INCHES NOMINAL IN
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_across_flats0.094 INCHES NOMINAL IN
nominal_thread_size0.086 INCHES IN
NSN5310-01-213-9675
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 25-00318 · 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 DIRECTION: RIGHT-HAND
•
WIDTH ACROSS FLATS: 0.094 INCHES NOMINAL IN
•
THREAD QUANTITY PER INCH: 56
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
NOMINAL THREAD SIZE: 0.086 INCHES IN
•
TEMP RATING: 500.0 FAHRENHEIT NOMINAL DEGF
•
MATERIAL: IRON ALLOY 660 OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL HEIGHT0.110 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
WIDTH ACROSS FLATS0.094 INCHES NOMINAL IN
THREAD QUANTITY PER INCH56
SURFACE TREATMENTPASSIVATE OVERALL
NOMINAL THREAD SIZE0.086 INCHES IN
TEMP RATING500.0 FAHRENHEIT NOMINAL DEGF
MATERIALIRON ALLOY 660 OVERALL
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
HW42-04Interchangeable
interchangeable cross-reference
interchangeable
860127-22Interchangeable
interchangeable cross-reference
interchangeable
114-0567-002Interchangeable
interchangeable cross-reference
interchangeable
105B3835P1Interchangeable
Same NIIN cross-reference
interchangeable
HW42-02Interchangeable
Same NIIN cross-reference
interchangeable
860127-21Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 25-00318?
25-00318 is a NUT,SELF-LOCKING,EXTENDED WASHER.
What parts can replace 25-00318?
There are 7 known substitutes for 25-00318: HW42-04, 860127-22, 114-0567-002 and 4 more. Substitute compatibility should be verified for your specific system.
Is 25-00318 still available?
25-00318 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