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Technical Data Sheet
76B681 ✓ Verified by PartsTable
· COMPONENT
WHAT YOU NEED TO KNOW
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Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The RETAINER,ELECTRON TUBE is a the manufacturer industrial component. Key specifications include material: STEEL, thread_class: 2A SINGLE MOUNTING FACILITY A, overall_height: 2.375 INCHES NOMINAL IN, overall_length: 1.438 INCHES NOMINAL IN, overall_diameter: 0.812 INCHES NOMINAL IN, style_designator: PLAIN CAP HOLD DOWN W/ SCREW. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5960-00-246-4622, 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
76B681
NSN: 5960-00-246-4622
FSC: 5960
CAGE: 26916 — NORTHROP GRUMMAN SYSTEMS CORPORATION DBA NORTHROP GRUMMAN SYSTEMS CORP DIV MULTIPLE (USA)
SPECIFICATIONS
materialSTEEL
thread_class2A SINGLE MOUNTING FACILITY A
overall_height2.375 INCHES NOMINAL IN
overall_length1.438 INCHES NOMINAL IN
overall_diameter0.812 INCHES NOMINAL IN
style_designatorPLAIN CAP HOLD DOWN W/ SCREW
surface_treatmentPASSIVATE
nominal_thread_size0.164 INCHES SINGLE MOUNTING FACILITY IN
mounting_stud_length2.375 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
thread_quantity_per_inch32 SINGLE MOUNTING FACILITY
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
mounting_facility_type_and_quantity1 THREADED STUD(S) SINGLE MOUNTING FACILITY
NSN5960-00-246-4622
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RETAINER,ELECTRON TUBE TITLE COMPONENT PN 76B681 MFR RETAINER,ELECTRON TUBE
KEY FEATURES
OVERALL DIAMETER: 0.812 INCHES NOMINAL IN
SURFACE TREATMENT: PASSIVATE
ACCOMMODATED ITEM SECURING DEVICE TYPE: COMPRESSION RING
MATERIAL: STEEL
THREAD CLASS: 2A SINGLE MOUNTING FACILITY A
EIA ELECTRON TUBE ENVELOPE ACCOMMODATED: T5 1/2
MOUNTING FACILITY TYPE AND QUANTITY: 1 THREADED STUD(S) SINGLE MOUNTING FACILITY
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL DIAMETER0.812 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE
ACCOMMODATED ITEM SECURING DEVICE TYPECOMPRESSION RING
OVERALL LENGTH1.438 INCHES NOMINAL IN
MATERIALSTEEL
THREAD CLASS2A SINGLE MOUNTING FACILITY A
EIA ELECTRON TUBE ENVELOPE ACCOMMODATEDT5 1/2
MOUNTING FACILITY TYPE AND QUANTITY1 THREADED STUD(S) SINGLE MOUNTING FACILITY
DISTANCE FROM RETAINER CENTER TO CENTERLINE OF MOUNTING FACILITY0.688 INCHES NOMINAL IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
74378Interchangeable
interchangeable cross-reference
interchangeable
2411 1-7/32Interchangeable
interchangeable cross-reference
interchangeable
53578Interchangeable
interchangeable cross-reference
interchangeable
10603Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 76B681?
76B681 is a RETAINER,ELECTRON TUBE.
What parts can replace 76B681?
There are 4 known substitutes for 76B681: 74378, 2411 1-7/32, 53578 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 76B681?
76B681 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5960-00-246-4622. This indicates validated use in U.S. government and defense supply chains.
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