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PartsTable / COMPONENT / KC7943
KC7943 ✓ 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

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include material: STEEL OVERALL, thickness: 0.043 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN, body_style: STRAIGHT SHAPE, EXTERNAL COUPLING, shell_type: SOLID, thread_class: 2A A, hole_diameter: 0.223 INCHES MINIMUM AND 0.228 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-178-9610, 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
KC7943
NSN: 5310-00-178-9610
FSC: 5310
CAGE: 56442 — DIAMOND REO TRUCK CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.043 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN
body_styleSTRAIGHT SHAPE, EXTERNAL COUPLING
shell_typeSOLID
thread_class2A A
hole_diameter0.223 INCHES MINIMUM AND 0.228 INCHES MAXIMUM IN
terminal_typeSOLDER WELL SINGLE MATING END SINGLE CONTACT GROUPING
overall_length1.300 INCHES NOMINAL IN
shell_materialCOPPER ALLOY
insert_materialPLASTIC TETRAFLUOROETHYLENE SINGLE MATING END
contact_materialCOPPER ALLOY SINGLE MATING END SINGLE CONTACT GROUPING
overall_diameter0.570 INCHES NOMINAL IN
NSN5310-00-178-9610
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: KC7943 · 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
•
HOLE DIAMETER: 0.223 INCHES MINIMUM AND 0.228 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
MATERIAL: STEEL OVERALL
•
SURFACE TREATMENT: ZINC AND DICHROMATE OVERALL
•
OVERALL DIAMETER: 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
•
THICKNESS: 0.043 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN
•
CENTER HOLE SHAPE STYLE: ROUND
•
PERIPHERAL SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS (FLIS)
HOLE DIAMETER0.223 INCHES MINIMUM AND 0.228 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MATERIALSTEEL OVERALL
SURFACE TREATMENTZINC AND DICHROMATE OVERALL
OVERALL DIAMETER0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
THICKNESS0.043 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN
CENTER HOLE SHAPE STYLEROUND
PERIPHERAL SHAPE STYLEROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
22BNC-50-0-3Interchangeable
interchangeable cross-reference
interchangeable
276MR138P001Interchangeable
interchangeable cross-reference
interchangeable
3391-0001Interchangeable
interchangeable cross-reference
interchangeable
1914289Interchangeable
Same NIIN cross-reference
interchangeable
874416Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is KC7943?
KC7943 is a CONNECTOR,RECEPTACLE,ELECTRICAL.
What parts can replace KC7943?
There are 5 known substitutes for KC7943: 22BNC-50-0-3, 276MR138P001, 3391-0001 and 2 more. Substitute compatibility should be verified for your specific system.
Is KC7943 still available?
KC7943 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