PartsTable
Technical Data Sheet
73680-1420 ✓ 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,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, nut_height: 0.349 INCHES MINIMUM AND 0.369 INCHES MAXIMUM IN, thread_class: 3B, thread_series: UNEF, hardness_rating: 25.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-089-9646, 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
73680-1420
NSN: 5310-00-089-9646
FSC: 5310
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.349 INCHES MINIMUM AND 0.369 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNEF
hardness_rating25.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM
locking_featurePREVAILING TORQUE ALL METAL DESIGN OR PREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_across_flats1.115 INCHES MINIMUM AND 1.127 INCHES MAXIMUM IN
nominal_thread_size0.875 INCHES IN
bearing_surface_typeCHAMFERED
NSN5310-00-089-9646
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 73680-1420 · 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
SURFACE TREATMENT: CADMIUM OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
BEARING SURFACE TYPE: CHAMFERED
HARDNESS RATING: 25.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM
THREAD QUANTITY PER INCH: 20
NOMINAL THREAD SIZE: 0.875 INCHES IN
THREAD SERIES: UNEF
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
SURFACE TREATMENTCADMIUM OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
BEARING SURFACE TYPECHAMFERED
HARDNESS RATING25.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM
THREAD QUANTITY PER INCH20
NOMINAL THREAD SIZE0.875 INCHES IN
THREAD SERIESUNEF
MATERIALSTEEL OVERALL
WIDTH ACROSS FLATS1.115 INCHES MINIMUM AND 1.127 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
TGAA1202AInterchangeable
interchangeable cross-reference
interchangeable
0BT45220Interchangeable
interchangeable cross-reference
interchangeable
313459Interchangeable
interchangeable cross-reference
interchangeable
711123Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 73680-1420?
73680-1420 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 73680-1420?
There are 4 known substitutes for 73680-1420: TGAA1202A, 0BT45220, 313459 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 73680-1420?
73680-1420 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-089-9646. This indicates validated use in U.S. government and defense supply chains.
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