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PartsTable / COMPONENT / 103888 ITEM 5
103888 ITEM 5 ✓ 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,FLAT is a the manufacturer industrial component. Key specifications include material: COPPER OVERALL, thickness: 0.055 INCHES NOMINAL IN, hole_diameter: 0.510 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN, overall_diameter: 0.875 INCHES NOMINAL IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-511-4868, 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
103888 ITEM 5
NSN: 5310-01-511-4868
FSC: 5310
CAGE: 3B570 — L & M RADIATOR, INC. (USA)
SPECIFICATIONS
materialCOPPER OVERALL
thickness0.055 INCHES NOMINAL IN
hole_diameter0.510 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN
overall_diameter0.875 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
end_item_identificationFADC LOCOP 99
cross-sectional_shape_styleRECTANGULAR
NSN5310-01-511-4868
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 103888 ITEM 5 · 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
•
CENTER HOLE SHAPE STYLE: ROUND
•
MATERIAL: COPPER OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
OVERALL DIAMETER: 0.875 INCHES NOMINAL IN
•
THICKNESS: 0.055 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
HOLE DIAMETER: 0.510 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE SHAPE STYLEROUND
MATERIALCOPPER OVERALL
PERIPHERAL SHAPE STYLEROUND
OVERALL DIAMETER0.875 INCHES NOMINAL IN
THICKNESS0.055 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER0.510 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN
END ITEM IDENTIFICATIONFADC LOCOP 99
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
J512 4 2 060202BAInterchangeable
interchangeable cross-reference
interchangeable
SAE-J512Interchangeable
interchangeable cross-reference
interchangeable
HA791Interchangeable
interchangeable cross-reference
interchangeable
60-244PC377Interchangeable
interchangeable cross-reference
interchangeable
63-377Interchangeable
interchangeable cross-reference
interchangeable
60-195PC377Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 103888 ITEM 5?
103888 ITEM 5 is a WASHER,FLAT.
What parts can replace 103888 ITEM 5?
There are 7 known substitutes for 103888 ITEM 5: J512 4 2 060202BA, SAE-J512, HA791 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 103888 ITEM 5?
103888 ITEM 5 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-511-4868. 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