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PartsTable / COMPONENT / 57585-820
57585-820 ✓ 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: DOUBLE HEXAGON, lubrication: DRY FILM LUBRICANT, temp_rating: 450.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF). This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-839-2065, 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
57585-820
NSN: 5310-00-839-2065
FSC: 5310
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleDOUBLE HEXAGON
lubricationDRY FILM LUBRICANT
temp_rating450.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
overall_height0.578 INCHES MAXIMUM IN
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
washer_thickness0.089 INCHES NOMINAL IN
surface_treatmentCADMIUM OVERALL
width_across_flats0.616 INCHES MINIMUM AND 0.627 INCHES MAXIMUM IN
NSN5310-00-839-2065
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 57585-820 · 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 CLASS: 3B
•
NOMINAL THREAD SIZE: 0.500 INCHES IN
•
MATERIAL: STEEL OVERALL
•
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
•
SURFACE TREATMENT: CADMIUM OVERALL
•
THREAD QUANTITY PER INCH: 20
•
LUBRICATION: DRY FILM LUBRICANT
•
NUT STYLE: DOUBLE HEXAGON
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3B
NOMINAL THREAD SIZE0.500 INCHES IN
MATERIALSTEEL OVERALL
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
SURFACE TREATMENTCADMIUM OVERALL
THREAD QUANTITY PER INCH20
LUBRICATIONDRY FILM LUBRICANT
NUT STYLEDOUBLE HEXAGON
WASHER OUTSIDE DIAMETER0.870 INCHES MAXIMUM IN
TEMP RATING450.0 FAHRENHEIT NOMINAL DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
4444958-5Interchangeable
interchangeable cross-reference
interchangeable
TRB-700Interchangeable
interchangeable cross-reference
interchangeable
503-120Interchangeable
interchangeable cross-reference
interchangeable
H-20-8Interchangeable
interchangeable cross-reference
interchangeable
LHEB220-080Interchangeable
Same NIIN cross-reference
interchangeable
943972-5Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 57585-820?
57585-820 is a NUT,SELF-LOCKING,EXTENDED WASHER.
What parts can replace 57585-820?
There are 6 known substitutes for 57585-820: 4444958-5, TRB-700, 503-120 and 3 more. Substitute compatibility should be verified for your specific system.
Is 57585-820 still available?
57585-820 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