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Technical Data Sheet
ST5M1291B2 ✓ 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

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include body_style: STRAIGHT SHAPE, EXTERNAL COUPLING, shell_type: SOLID, thread_class: 2A A, terminal_type: SOLDER WELL SINGLE MATING END SINGLE CONTACT GROUPING, overall_length: 1.512 INCHES NOMINAL IN, shell_material: STEEL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5935-00-550-9983, 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
ST5M1291B2
NSN: 5935-00-550-9983
FSC: 5935
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
body_styleSTRAIGHT SHAPE, EXTERNAL COUPLING
shell_typeSOLID
thread_class2A A
terminal_typeSOLDER WELL SINGLE MATING END SINGLE CONTACT GROUPING
overall_length1.512 INCHES NOMINAL IN
shell_materialSTEEL
contact_materialNICKEL ALLOY SINGLE MATING END SINGLE CONTACT GROUPING
overall_diameter1.110 INCHES MINIMUM AND 1.120 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
precious_materialGOLD AND SILVER
terminal_locationBACK SINGLE MATING END SINGLE CONTACT GROUPING
mating_end_quantity1
NSN5935-00-550-9983
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CONNECTOR,RECEPTACLE,ELECTRICAL TITLE COMPONENT PN ST5M1291B2 MFR CONNECTOR,RECEPTACLE,E
KEY FEATURES
OVERALL DIAMETER: 1.110 INCHES MINIMUM AND 1.120 INCHES MAXIMUM IN
CONTACT REMOVABILITY: NONREMOVABLE SINGLE MATING END SINGLE CONTACT GROUPING
NOMINAL THREAD SIZE: 0.688 INCHES IN
THREAD SERIES DESIGNATOR: UNEF
PRECIOUS MATERIAL AND WEIGHT: 0.013 GOLD GRAINS, TROY AND 0.013 SILVER GRAINS, TROY
CONTACT SURFACE TREATMENT: GOLD AND SILVER SINGLE MATING END SINGLE CONTACT GROUPING
SHELL MATERIAL: STEEL
INCLUDED CONTACT QUANTITY: 13 SINGLE MATING END SINGLE CONTACT GROUPING
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL DIAMETER1.110 INCHES MINIMUM AND 1.120 INCHES MAXIMUM IN
CONTACT REMOVABILITYNONREMOVABLE SINGLE MATING END SINGLE CONTACT GROUPING
NOMINAL THREAD SIZE0.688 INCHES IN
THREAD SERIES DESIGNATORUNEF
PRECIOUS MATERIAL AND WEIGHT0.013 GOLD GRAINS, TROY AND 0.013 SILVER GRAINS, TROY
CONTACT SURFACE TREATMENTGOLD AND SILVER SINGLE MATING END SINGLE CONTACT GROUPING
SHELL MATERIALSTEEL
INCLUDED CONTACT QUANTITY13 SINGLE MATING END SINGLE CONTACT GROUPING
SHELL SURFACE TREATMENTCADMIUM AND CHROMATE
SHELL TYPESOLID
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
18504Interchangeable
interchangeable cross-reference
interchangeable
R18504Interchangeable
interchangeable cross-reference
interchangeable
SK65-3173AInterchangeable
interchangeable cross-reference
interchangeable
5867653173Interchangeable
interchangeable cross-reference
interchangeable
65-3173Interchangeable
interchangeable cross-reference
interchangeable
18504-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ST5M1291B2?
ST5M1291B2 is a CONNECTOR,RECEPTACLE,ELECTRICAL.
What parts can replace ST5M1291B2?
There are 11 known substitutes for ST5M1291B2: 18504, R18504, SK65-3173A and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ST5M1291B2?
ST5M1291B2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5935-00-550-9983. This indicates validated use in U.S. government and defense supply chains.
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