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Technical Data Sheet
PartsTable / COMPONENT / 4-LD
4-LD ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include criticality_code_justification: ZZZY. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5660-00-913-1526, 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
4-LD
NSN: 5660-00-913-1526
FSC: 5660
CAGE: 92458 — ROBERTSON WIRE PRODUCTS CO (USA)
SPECIFICATIONS
criticality_code_justificationZZZY
reference_number_differentiating_characteristicsMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS
NSN5660-00-913-1526
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAP,PROTECTIVE,DUST AND MOISTURE TITLE COMPONENT PN 4-LD MFR CAP,PROTECTIVE,DUST AN
KEY FEATURES
•
MATERIAL: ALUMINUM
•
POST SHAPE: ROUND
•
STYLE DESIGNATOR: DOME
•
DIAMETER: 3.000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALALUMINUM
POST SHAPEROUND
STYLE DESIGNATORDOME
DIAMETER3.000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
B48AN800Interchangeable
interchangeable cross-reference
interchangeable
5HB21Interchangeable
interchangeable cross-reference
interchangeable
RM64Interchangeable
interchangeable cross-reference
interchangeable
5048Interchangeable
interchangeable cross-reference
interchangeable
2020JInterchangeable
interchangeable cross-reference
interchangeable
8NBK1224YZPInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4-LD?
4-LD is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace 4-LD?
There are 23 known substitutes for 4-LD: B48AN800, 5HB21, RM64 and 20 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4-LD?
4-LD is cataloged in the Federal Logistics Information System (FLIS) under NSN 5660-00-913-1526. 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