PartsTable
Technical Data Sheet
PartsTable / COMPONENT / GN10U820
GN10U820 ✓ 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 COMP 8740 OR STEEL COMP 4340 OR STEEL COMP 4140 OR STEEL COMP 4130 OVERALL, nut_style: HEXAGON, nut_height: 0.328 INCHES NOMINAL IN, lubrication: DRY FILM LUBRICANT, temp_rating: 450.0 FAHRENHEIT MAXIMUM 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 5310-00-616-5997, 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
GN10U820
NSN: 5310-00-616-5997
FSC: 5310
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP 8740 OR STEEL COMP 4340 OR STEEL COMP 4140 OR STEEL COMP 4130 OVERALL
nut_styleHEXAGON
nut_height0.328 INCHES NOMINAL IN
lubricationDRY FILM LUBRICANT
temp_rating450.0 FAHRENHEIT MAXIMUM DEGF
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
locking_featurePREVAILING TORQUE ALL METAL DESIGN
special_featuresROCKWELL C34-C41 HARDNESS RATING;LUBRICATED WITH KAYLUBE MOLYBDENUM DISULFIDE;THIS ITEM IS A CRITICAL SAFETY ITEM (CSI) AS NOTED BY DEMIL CODE
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_across_flats0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
NSN5310-00-616-5997
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: GN10U820 · 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
•
TEMP RATING: 450.0 FAHRENHEIT MAXIMUM DEGF
•
BEARING SURFACE FINISH: 125.0 MICROINCHES
•
WIDTH ACROSS FLATS: 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
•
THREAD QUANTITY PER INCH: 20
•
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
•
CRITICALITY CODE JUSTIFICATION: ZZZK
TECHNICAL CHARACTERISTICS (FLIS)
TEMP RATING450.0 FAHRENHEIT MAXIMUM DEGF
END ITEM IDENTIFICATION1630-00-970-6671
BEARING SURFACE FINISH125.0 MICROINCHES
WIDTH ACROSS FLATS0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
THREAD QUANTITY PER INCH20
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
CRITICALITY CODE JUSTIFICATIONZZZK
SPECIAL FEATURESROCKWELL C34-C41 HARDNESS RATING;LUBRICATED WITH KAYLUBE MOLYBDENUM DISULFIDE;THIS ITEM IS A CRITICAL SAFETY ITEM (CSI) AS NOTED BY DEMIL CODE
NOMINAL THREAD SIZE0.500 INCHES IN
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
H10-8Interchangeable
interchangeable cross-reference
interchangeable
LH7644-080Interchangeable
interchangeable cross-reference
interchangeable
5310004492378Interchangeable
interchangeable cross-reference
interchangeable
H10E8Interchangeable
interchangeable cross-reference
interchangeable
2274194Interchangeable
interchangeable cross-reference
interchangeable
8516776-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy GN10U820?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is GN10U820?
GN10U820 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace GN10U820?
There are 10 known substitutes for GN10U820: H10-8, LH7644-080, 5310004492378 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for GN10U820?
GN10U820 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-616-5997. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — GN10U820

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026