PartsTable
Technical Data Sheet
NAS679A3 ✓ 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: STEEL OVERALL, nut_style: HEXAGON, nut_height: 0.188 INCHES NOMINAL IN, lubrication: DRY FILM LUBRICANT, temp_rating: 450.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-791-0513, 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
NAS679A3
NSN: 5310-00-791-0513
FSC: 5310
CAGE: 80205 — NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.188 INCHES NOMINAL IN
lubricationDRY FILM LUBRICANT
temp_rating450.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
overall_height0.154 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
hardness_rating49.0 ROCKWELL C MAXIMUM
locking_featurePREVAILING TORQUE ALL METAL DESIGN
special_featuresTHE ITEM IS A FLIGHT SAFETY CRITICAL AIRCRAFT PART (FSCAP)
thread_directionRIGHT-HAND
NSN5310-00-791-0513
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: NAS679A3 · 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
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
THREAD SERIES: UNF
NUT STYLE: HEXAGON
SPECIFICATION/STANDARD DATA: 80205-NAS679/CANCELED/ PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NUT HEIGHT: 0.188 INCHES NOMINAL IN
NOMINAL THREAD SIZE: 0.190 INCHES IN
BEARING SURFACE TYPE: FLAT
TECHNICAL CHARACTERISTICS (FLIS)
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
THREAD SERIESUNF
NUT STYLEHEXAGON
SPECIFICATION/STANDARD DATA80205-NAS679/CANCELED/ PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NUT HEIGHT0.188 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.190 INCHES IN
BEARING SURFACE TYPEFLAT
SPECIAL FEATURESFLEET BALLISTIC MISSLE QUALITY,AS IDENTIFIED BY QUALITY CONTROL NO.POSO 900066
THREAD DIRECTIONRIGHT-HAND
TEMP RATING550.0 FAHRENHEIT NOMINAL DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
P26041Interchangeable
interchangeable cross-reference
interchangeable
VN300A02Interchangeable
interchangeable cross-reference
interchangeable
5310008071474Interchangeable
interchangeable cross-reference
interchangeable
RMLHTM-02WInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NAS679A3?
NAS679A3 is a NUT,SELF-LOCKING,EXTENDED WASHER.
What parts can replace NAS679A3?
There are 4 known substitutes for NAS679A3: P26041, VN300A02, 5310008071474 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for NAS679A3?
NAS679A3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-791-0513. This indicates validated use in U.S. government and defense supply chains.
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