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SK1521 ✓ 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

HOLDER,ELECTRICAL CONTACT BRUSH. Key specifications include width: 0.250 INCHES NOMINAL IN, material: COPPER ALLOY 544 OVERALL, tip_type: FLAT TIP, body_width: 4.375 INCHES NOMINAL IN, body_height: 4.310 INCHES MAXIMUM IN, body_length: 5.500 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5977-01-205-6251, 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
SK1521
NSN: 5977-01-205-6251
FSC: 5977
CAGE: 72441 — FLOWER D B MFG CO (USA)
SPECIFICATIONS
width0.250 INCHES NOMINAL IN
materialCOPPER ALLOY 544 OVERALL
tip_typeFLAT TIP
body_width4.375 INCHES NOMINAL IN
body_height4.310 INCHES MAXIMUM IN
body_length5.500 INCHES NOMINAL IN
corner_shapeSQUARE ALL CORNERS
hole_diameter0.07810 INCHES NOMINAL FIRST IN
overall_width3.180 INCHES MAXIMUM IN
terminal_typeSCREW
aperture_width5.750 INCHES NOMINAL IN
inclosure_typeHERMETICALLY SEALED
NSN5977-01-205-6251
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available HOLDER,ELECTRICAL CONTACT BRUSH TITLE COMPONENT PN SK1521 MFR HOLDER,ELECTRICAL CONT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
3729Interchangeable
interchangeable cross-reference
interchangeable
272SC210Interchangeable
interchangeable cross-reference
interchangeable
5120-00-152-2297Interchangeable
interchangeable cross-reference
interchangeable
115-450Interchangeable
interchangeable cross-reference
interchangeable
D3729Interchangeable
interchangeable cross-reference
interchangeable
B3524-7Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SK1521?
SK1521 is a HOLDER,ELECTRICAL CONTACT BRUSH.
What parts can replace SK1521?
There are 11 known substitutes for SK1521: 3729, 272SC210, 5120-00-152-2297 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SK1521?
SK1521 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5977-01-205-6251. 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