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K50371-3 — NUT,SELF-LOCKING,PLATE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

K50371-3: NUT,SELF-LOCKING,PLATE.

The NUT,SELF-LOCKING,PLATE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, nut_style: PLATE, nut_height: 0.230 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN, nut_length: 0.888 INCHES MINIMUM AND 0.948 INCHES MAXIMUM IN, plate_width: 0.310 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN, thread_class: 3B. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-089-2170, 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
K50371-3
NSN: 5310-01-089-2170
FSC: 5310 — Nuts and Washers
CAGE: 15653 — HOWMET GLOBAL FASTENING SYSTEMS INC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
nut_stylePLATE
nut_height0.230 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
nut_length0.888 INCHES MINIMUM AND 0.948 INCHES MAXIMUM IN
plate_width0.310 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
overall_height0.230 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
hardness_rating33.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM
locking_featureFREE-RUNNING ALL METAL DESIGN
plate_thickness0.041 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
NSN5310-01-089-2170
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: K50371-3 · 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
•
PLATE THICKNESS: 0.041 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN
•
NUT LENGTH: 0.888 INCHES MINIMUM AND 0.948 INCHES MAXIMUM IN
•
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
•
PLATE WIDTH: 0.310 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN
•
HARDNESS RATING: 33.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM
•
REMOVABLE NUT MANUFACTURER PART NUMBER: 768277
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.230 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
PLATE THICKNESS0.041 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN
NUT LENGTH0.888 INCHES MINIMUM AND 0.948 INCHES MAXIMUM IN
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
PLATE WIDTH0.310 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN
HARDNESS RATING33.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM
REMOVABLE NUT MANUFACTURER PART NUMBER768277
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.190 INCHES IN
LOCKING FEATUREFREE-RUNNING ALL METAL DESIGN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 1
768277Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is K50371-3?
K50371-3 is a NUT,SELF-LOCKING,PLATE.
What parts can replace K50371-3?
There is 1 known substitute for K50371-3: 768277. Substitute compatibility should be verified for your specific system.
What is the NSN for K50371-3?
K50371-3 is cataloged in the U.S. Government catalog under NSN 5310-01-089-2170. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.