PartsTable
Technical Data Sheet
6784445-5 ✓ 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,DOUBLE HEXAGON. Key specifications include material: STEEL COMP 302 OVERALL, nut_style: DOUBLE HEXAGON, nut_height: 0.349 INCHES MINIMUM AND 0.359 INCHES MAXIMUM IN, temp_rating: 900.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B, thread_series: UNF. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-721-5968, 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
6784445-5
NSN: 5310-00-721-5968
FSC: 5310
CAGE: 73342 — ALLISON TRANSMISSION INC DBA ALLISON TRANSMISSION, INC (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OVERALL
nut_styleDOUBLE HEXAGON
nut_height0.349 INCHES MINIMUM AND 0.359 INCHES MAXIMUM IN
temp_rating900.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNF
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
precious_materialSILVER
surface_treatmentSILVER OVERALL
width_across_flats0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
nominal_thread_size0.312 INCHES IN
NSN5310-00-721-5968
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6784445-5 · 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
MATERIAL: STEEL COMP 302 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5637 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
BEARING SURFACE TYPE: CHAMFERED
NOMINAL THREAD SIZE: 0.312 INCHES IN
PRECIOUS MATERIAL: SILVER
THREAD DIRECTION: RIGHT-HAND
SURFACE TREATMENT: SILVER OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
MATERIALSTEEL COMP 302 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5637 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
BEARING SURFACE TYPECHAMFERED
NOMINAL THREAD SIZE0.312 INCHES IN
PRECIOUS MATERIALSILVER
THREAD DIRECTIONRIGHT-HAND
SURFACE TREATMENTSILVER OVERALL
WIDTH ACROSS FLATS0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
THREAD CLASS3B
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
AW2-1/2DInterchangeable
interchangeable cross-reference
interchangeable
7211958P3Interchangeable
interchangeable cross-reference
interchangeable
7897119P3Interchangeable
interchangeable cross-reference
interchangeable
511005Interchangeable
interchangeable cross-reference
interchangeable
5-1-2775Interchangeable
interchangeable cross-reference
interchangeable
782121501104Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6784445-5?
6784445-5 is a NUT,SELF-LOCKING,DOUBLE HEXAGON.
What parts can replace 6784445-5?
There are 7 known substitutes for 6784445-5: AW2-1/2D, 7211958P3, 7897119P3 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 6784445-5?
6784445-5 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-721-5968. This indicates validated use in U.S. government and defense supply chains.
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