PartsTable
Technical Data Sheet
491-257 ✓ 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

The 491-257 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6685-00-883-3731, 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
491-257
NSN: 6685-00-883-3731
FSC: 6685
CAGE: 80145 — LFE INSTRUMENTS A MARK IV CO (USA)
SPECIFICATIONS
Part Number491-257
NSN6685-00-883-3731
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available 491-257 TITLE COMPONENT PN 491-257 MFR 491-257
KEY FEATURES
POINTER/PEN TYPE AND QUANTITY: 1 INDICATING SINGLE
SCALE TYPE: ECCENTRIC
TECHNICAL CHARACTERISTICS (FLIS)
POINTER/PEN TYPE AND QUANTITY1 INDICATING SINGLE
SCALE TYPEECCENTRIC
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
3N177PC102Interchangeable
interchangeable cross-reference
interchangeable
120377Interchangeable
interchangeable cross-reference
interchangeable
3N135PC102Interchangeable
interchangeable cross-reference
interchangeable
000948 ITEM 12Interchangeable
interchangeable cross-reference
interchangeable
6008-2RSInterchangeable
interchangeable cross-reference
interchangeable
21202Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 491-257?
491-257 is a 491-257.
What parts can replace 491-257?
There are 17 known substitutes for 491-257: 3N177PC102, 120377, 3N135PC102 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 491-257?
491-257 is cataloged in the Federal Logistics Information System (FLIS) under NSN 6685-00-883-3731. This indicates validated use in U.S. government and defense supply chains.
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