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TG77 ✓ 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

ISOLATOR,RADIO FREQUENCY REFLECT. Key specifications include material: STEEL METER CASE, case_type: CYLINDRICAL, tube_type: SPARK GAP, body_style: PLAIN, SOLID, bore_style: W/ KEYWAY BOTH ENDS, tooth_form: STANDARD. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3020-00-288-1375, 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
TG77
NSN: 3020-00-288-1375
FSC: 3020
CAGE: 98435 — MARMON GROUP INC THE ACTIVE GEAR CO DIV (USA)
SPECIFICATIONS
materialSTEEL METER CASE
case_typeCYLINDRICAL
tube_typeSPARK GAP
body_stylePLAIN, SOLID
bore_styleW/ KEYWAY BOTH ENDS
tooth_formSTANDARD
overall_height3.075 INCHES NOMINAL IN
pitch_diameter3.8330 INCHES NOMINAL IN
pressure_angle20.0000 DEGREES
teeth_quantity23
hardness_rating58.0 ROCKWELL C MINIMUM AND 63.0 ROCKWELL C MAXIMUM OVERALL
overall_diameter1.275 INCHES NOMINAL IN
NSN3020-00-288-1375
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available ISOLATOR,RADIO FREQUENCY REFLECT TITLE COMPONENT PN TG77 MFR ISOLATOR,RADIO FREQUEN
KEY FEATURES
•
PITCH DIAMETER: 3.8330 INCHES NOMINAL IN
•
TEETH QUANTITY: 23
•
BODY STYLE: PLAIN, SOLID
•
HARDNESS RATING: 58.0 ROCKWELL C MINIMUM AND 63.0 ROCKWELL C MAXIMUM OVERALL
•
HUB NOMINAL DIAMETER: 3.188 INCHES SECOND END IN
•
BORE STYLE: W/ KEYWAY BOTH ENDS
•
FACE NOMINAL WIDTH: 0.750 INCHES IN
•
BORE NOMINAL DIAMETER: 2.500 INCHES BOTH ENDS IN
TECHNICAL CHARACTERISTICS (FLIS)
PITCH DIAMETER3.8330 INCHES NOMINAL IN
TEETH QUANTITY23
BODY STYLEPLAIN, SOLID
HARDNESS RATING58.0 ROCKWELL C MINIMUM AND 63.0 ROCKWELL C MAXIMUM OVERALL
HUB NOMINAL DIAMETER3.188 INCHES SECOND END IN
BORE STYLEW/ KEYWAY BOTH ENDS
FACE NOMINAL WIDTH0.750 INCHES IN
BORE NOMINAL DIAMETER2.500 INCHES BOTH ENDS IN
NOMINAL OVERALL LENGTH1.781 INCHES IN
STYLE DESIGNATORPROTRUDING HUBS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
4915Interchangeable
interchangeable cross-reference
interchangeable
8682926Interchangeable
interchangeable cross-reference
interchangeable
D317Interchangeable
interchangeable cross-reference
interchangeable
77607Interchangeable
interchangeable cross-reference
interchangeable
268219-7Interchangeable
interchangeable cross-reference
interchangeable
118754Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is TG77?
TG77 is a ISOLATOR,RADIO FREQUENCY REFLECT.
What parts can replace TG77?
There are 27 known substitutes for TG77: 4915, 8682926, D317 and 24 more. Substitute compatibility should be verified for your specific system.
Is TG77 still available?
TG77 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026