PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-T-21309Tang Breakoff Tool,screw Thread

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5120-01-329-7537 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-329-7537 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-329-7537. Primary manufacturer part number: MIL-T-21309.
Features
  • Tang Breakoff Tool,screw Thread — FSC 5120
  • Thread Size and Series/type Designator: 10-24 UNIFIED NATIONAL COARSE (UNC) AND 10-32 UNF
  • Unit Type: SOLID PUNCH
  • Nondefinitive Spec/std Data: 4 TYPE AND 3 CLASS AND 10 SIZE
  • 2 verified cross-references
  • Primary manufacturer: Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Tang Breakoff Tool,screw Thread, cataloged under National Stock Number 5120-01-329-7537, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-329-7537
Primary Part NumberMIL-T-21309
Item NameTang Breakoff Tool,screw Thread
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Thread Size and Series/type Designator10-24 UNIFIED NATIONAL COARSE (UNC) AND 10-32 UNF
Unit TypeSOLID PUNCH
Nondefinitive Spec/std Data4 TYPE AND 3 CLASS AND 10 SIZE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5120-00-776-7263 INTERCHANGEABLE
Tang Breakoff Tool,screw Thread
5120-00-776-7266 INTERCHANGEABLE
Tang Breakoff Tool,screw Thread
5120-00-777-3814 INTERCHANGEABLE
Tang Breakoff Tool,screw Thread
Cross-Reference Index
Part NumberManufacturer
MIL-T-21309 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-T-21309 TY4CL3 General Services Administration Federal Supply Service (USA)
Related Parts
5120-00-776-7263INTERCHANGEABLE
TANG BREAKOFF TOOL,SCREW THREAD
5120-00-776-7266INTERCHANGEABLE
TANG BREAKOFF TOOL,SCREW THREAD
5120-00-777-3814INTERCHANGEABLE
TANG BREAKOFF TOOL,SCREW THREAD

Frequently Asked Questions

What is NSN 5120-01-329-7537?

NSN 5120-01-329-7537 is a Tang Breakoff Tool,screw Thread, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-329-7537?

NSN 5120-01-329-7537 has 2 cross-referenced part numbers: MIL-T-21309 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-T-21309 TY4CL3 (General Services Administration Federal Supply Service).

What NSN replaces 5120-01-329-7537?

There are 3 known substitutes for 5120-01-329-7537: 5120-00-776-7263, 5120-00-776-7266, 5120-00-777-3814. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-T-21309?

Key specifications for MIL-T-21309: Thread Size and Series/type Designator: 10-24 UNIFIED NATIONAL COARSE (UNC) AND 10-32 UNF; Unit Type: SOLID PUNCH; Nondefinitive Spec/std Data: 4 TYPE AND 3 CLASS AND 10 SIZE. 3 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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