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Technical Data Sheet
MIL-T-21309 TY1CL3 ✓ 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

TANG BREAKOFF TOOL,SCREW THREAD. Key specifications include length: 0.625 INCHES NOMINAL SQUARE END IN, material: STEEL OVERALL, thread_length: 1.812 INCHES NOMINAL IN, overall_length: 4.031 INCHES NOMINAL IN, shank_diameter: 0.542 INCHES MAXIMUM IN, special_features: FINISHING TAP FOR SCREW THREAD INSERT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5136-00-123-6790, 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
MIL-T-21309 TY1CL3
NSN: 5136-00-123-6790
FSC: 5136
CAGE: 80244 — GENERAL SERVICES ADMINISTRATION FEDERAL SUPPLY SERVICE (USA)
SPECIFICATIONS
length0.625 INCHES NOMINAL SQUARE END IN
materialSTEEL OVERALL
thread_length1.812 INCHES NOMINAL IN
flute_quantity4
overall_length4.031 INCHES NOMINAL IN
shank_diameter0.542 INCHES MAXIMUM IN
special_featuresFINISHING TAP FOR SCREW THREAD INSERT
style_designatorSTRAIGHT FLUTE
thread_directionRIGHT-HAND
thread_structureREGULAR
width_across_flats0.406 INCHES NOMINAL IN
starting_chamfer_typeBOTTOMING
NSN5136-00-123-6790
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available TANG BREAKOFF TOOL,SCREW THREAD TITLE COMPONENT PN MIL-T-21309 TY1CL3 MFR TANG BREAKOFF TOOL,SCR
KEY FEATURES
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND 3 CLASS
FLUTE QUANTITY: 3
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 0.250-28 STI
STARTING CHAMFER TYPE: BOTTOMING
MATERIAL: STEEL OVERALL
THREAD STRUCTURE: REGULAR
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATA1 TYPE AND 3 CLASS
SPECIAL FEATURESFINISHING TAP FOR SCREW THREAD INSERT
FLUTE QUANTITY3
THREAD SIZE AND SERIES/TYPE DESIGNATOR0.250-28 STI
STARTING CHAMFER TYPEBOTTOMING
MATERIALSTEEL OVERALL
THREAD STRUCTUREREGULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
4FBAInterchangeable
Same NIIN cross-reference
interchangeable
MIL-T-21309Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-T-21309 TY1CL3?
MIL-T-21309 TY1CL3 is a TANG BREAKOFF TOOL,SCREW THREAD.
What parts can replace MIL-T-21309 TY1CL3?
There are 2 known substitutes for MIL-T-21309 TY1CL3: 4FBA, MIL-T-21309. Substitute compatibility should be verified for your specific system.
What is the NSN for MIL-T-21309 TY1CL3?
MIL-T-21309 TY1CL3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5136-00-123-6790. This indicates validated use in U.S. government and defense supply chains.
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