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PartsTable / COMPONENT / 803-1623943 PC 18
803-1623943 PC 18 ✓ 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 WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, recess_angle: 90.0 DEGREES NOMINAL, hole_diameter: 0.313 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN, recess_diameter: 0.438 INCHES NOMINAL IN, outside_diameter: 0.526 INCHES NOMINAL IN, style_designator: RECESSED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-469-0725, 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
803-1623943 PC 18
NSN: 5310-01-469-0725
FSC: 5310
CAGE: 80064 — NAVAL SHIP SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
recess_angle90.0 DEGREES NOMINAL
hole_diameter0.313 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN
recess_diameter0.438 INCHES NOMINAL IN
outside_diameter0.526 INCHES NOMINAL IN
style_designatorRECESSED
material_thickness0.094 INCHES NOMINAL IN
NSN5310-01-469-0725
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 803-1623943 PC 18 · 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
•
OUTSIDE DIAMETER: 0.526 INCHES NOMINAL IN
•
RECESS ANGLE: 90.0 DEGREES NOMINAL
•
HOLE DIAMETER: 0.313 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.094 INCHES NOMINAL IN
•
MATERIAL: COPPER ALLOY OVERALL
•
RECESS DIAMETER: 0.438 INCHES NOMINAL IN
•
STYLE DESIGNATOR: RECESSED
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER0.526 INCHES NOMINAL IN
RECESS ANGLE90.0 DEGREES NOMINAL
HOLE DIAMETER0.313 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN
MATERIAL THICKNESS0.094 INCHES NOMINAL IN
MATERIALCOPPER ALLOY OVERALL
RECESS DIAMETER0.438 INCHES NOMINAL IN
STYLE DESIGNATORRECESSED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
803-1623943 PIECE 55Interchangeable
interchangeable cross-reference
interchangeable
1623943Interchangeable
interchangeable cross-reference
interchangeable
803-1623943Interchangeable
interchangeable cross-reference
interchangeable
803-2226372Interchangeable
interchangeable cross-reference
interchangeable
803-1623943 PC54Interchangeable
interchangeable cross-reference
interchangeable
803-1041890 PC 49Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 803-1623943 PC 18?
803-1623943 PC 18 is a WASHER,RECESSED.
What parts can replace 803-1623943 PC 18?
There are 15 known substitutes for 803-1623943 PC 18: 803-1623943 PIECE 55, 1623943, 803-1623943 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 803-1623943 PC 18?
803-1623943 PC 18 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-469-0725. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026