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Technical Data Sheet
4521 ✓ Verified by PartsTable
· MRO · MRO_GENERAL
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

The RESISTOR,FIXED,WIRE WOUND is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, grip_length: 1.000 INCHES MINIMUM AND 1.040 INCHES MAXIMUM IN, actuation_type: PULL AND PUSH, style_designator: RING HANDLE, surface_treatment: ZINC AND CHROMATE OVERALL, ring_handle_diameter: 0.875 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 6625-01-087-7307, 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
MRO MRO_GENERAL 4521
NSN: 6625-01-087-7307
FSC: 6625
CAGE: 70998 — BIRD ELECTRONIC CORPORATION DIV BIRD ELECTRONIC CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
grip_length1.000 INCHES MINIMUM AND 1.040 INCHES MAXIMUM IN
actuation_typePULL AND PUSH
detent_quantity1
style_designatorRING HANDLE
surface_treatmentZINC AND CHROMATE OVERALL
ring_handle_diameter0.875 INCHES NOMINAL IN
end_item_identification3930-01-599-9978
detent_to_tapered_end_distance0.194 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN
part_name_assigned_by_controlling_agencyPIN, RING DETENT
NSN6625-01-087-7307
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RESISTOR,FIXED,WIRE WOUND TITLE COMPONENT PN 4521 MFR RESISTOR,FIXED,WIRE WO
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
T6355978PC1Interchangeable
interchangeable cross-reference
interchangeable
424401PC6Interchangeable
interchangeable cross-reference
interchangeable
4521Interchangeable
interchangeable cross-reference
interchangeable
HB6018Interchangeable
interchangeable cross-reference
interchangeable
3-6018Interchangeable
interchangeable cross-reference
interchangeable
P23574Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4521?
4521 is a RESISTOR,FIXED,WIRE WOUND. It is classified as a MRO (MRO_GENERAL).
What parts can replace 4521?
There are 18 known substitutes for 4521: T6355978PC1, 424401PC6, 4521 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4521?
4521 is cataloged in the Federal Logistics Information System (FLIS) under NSN 6625-01-087-7307. This indicates validated use in U.S. government and defense supply chains.
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