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C057C3 — NUT,SELF-LOCKING,PLATE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

C057C3: NUT,SELF-LOCKING,PLATE.

The NUT,SELF-LOCKING,PLATE is a the manufacturer industrial component. Key specifications include material: IRON ALLOY 660 NUT, nut_style: PLATE, nut_height: 0.228 INCHES NOMINAL IN, nut_length: 0.521 INCHES MAXIMUM IN, plate_width: 0.437 INCHES MAXIMUM IN, thread_class: 3B. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-968-3097, 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
C057C3
NSN: 5310-00-968-3097
FSC: 5310 — Nuts and Washers
CAGE: 81755 — LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN AERONAUTICS COMPANY (USA)
SPECIFICATIONS
materialIRON ALLOY 660 NUT
nut_stylePLATE
nut_height0.228 INCHES NOMINAL IN
nut_length0.521 INCHES MAXIMUM IN
plate_width0.437 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNF
overall_height0.365 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN
locking_featurePREVAILING TORQUE ALL METAL DESIGN
plate_thickness0.031 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentSILVER OVERALL
NSN5310-00-968-3097
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: C057C3 · 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: 0.031 INCHES NOMINAL IN
•
NUT LENGTH: 0.521 INCHES MAXIMUM IN
•
THREAD SERIES: UNF
•
PLATE WIDTH: 0.437 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS5525 ASSN STD SINGLE MATERIAL RESPONSE NUT
•
MOUNTING HOLE DIAMETER: 0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN
•
NUT COUNTERBORE DEPTH: 0.062 INCHES MINIMUM NUT IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.365 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN
PLATE THICKNESS0.031 INCHES NOMINAL IN
NUT LENGTH0.521 INCHES MAXIMUM IN
THREAD SERIESUNF
PLATE WIDTH0.437 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS5525 ASSN STD SINGLE MATERIAL RESPONSE NUT
MOUNTING HOLE DIAMETER0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN
NUT COUNTERBORE DEPTH0.062 INCHES MINIMUM NUT IN
THREAD DIRECTIONRIGHT-HAND
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES ALONG WIDTH0.217 INCHES MINIMUM AND 0.221 INCHES MAXIMUM IN
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 2
MT13C1032CK1Reference document
Same NSN cross-reference
Reference document — Secondary reference
LHA6972K1-02Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 C057C3?
C057C3 is a NUT,SELF-LOCKING,PLATE.
What parts can replace C057C3?
There are 2 known substitutes for C057C3: MT13C1032CK1, LHA6972K1-02. Substitute compatibility should be verified for your specific system.
What is the NSN for C057C3?
C057C3 is cataloged in the U.S. Government catalog under NSN 5310-00-968-3097. 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.