PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-T-21309Inserter,screw Thread Insert

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5120-00-797-2403 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-797-2403 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-797-2403. Primary manufacturer part number: MIL-T-21309.
Features
  • Inserter,screw Thread Insert — FSC 5120
  • Thread Size and Series/type Designator: 7/16-14 UNIFIED NATIONAL COARSE (UNC)
  • Specification/standard Data: 0U583-SAE AS59158 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Unit Type: PREWINDER
  • Nondefinitive Spec/std Data: 3 TYPE AND 1 CLASS AND A STYLE
  • 9 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 Inserter,screw Thread Insert, cataloged under National Stock Number 5120-00-797-2403, 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 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-00-797-2403
Primary Part NumberMIL-T-21309
Item NameInserter,screw Thread Insert
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 Designator7/16-14 UNIFIED NATIONAL COARSE (UNC)
Specification/standard Data0U583-SAE AS59158 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Unit TypePREWINDER
Nondefinitive Spec/std Data3 TYPE AND 1 CLASS AND A STYLE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5120-00-050-9731 INTERCHANGEABLE
Inserter,screw Thread Insert
2810-00-118-552235517 INTERCHANGEABLE
Adapter Assembly,vacuum Pump Dri
Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
5815-00-125-499575517 INTERCHANGEABLE
Guide
Lucent Technologies Inc Corporate Headquarters
5120-00-237-4669 INTERCHANGEABLE
Inserter,screw Thread Insert
5120-00-244-1710 INTERCHANGEABLE
Inserter,screw Thread Insert
5120-00-672-8897HIT1220 INTERCHANGEABLE
Inserter,screw Thread Insert
Helical Wire Inc
5120-00-710-7435 INTERCHANGEABLE
Inserter,screw Thread Insert
5120-00-710-7437 INTERCHANGEABLE
Inserter,screw Thread Insert
5120-00-797-2402 INTERCHANGEABLE
Inserter,screw Thread Insert
5120-00-797-2404 INTERCHANGEABLE
Inserter,screw Thread Insert
Cross-Reference Index
Part NumberManufacturer
MIL-T-21309 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
AS59158 Sae International Dba Sae International (USA)
A-A-59158 TY3CL1STA General Services Administration Federal Supply Service (USA)
7551-7 Stanley Engineered Fastening Llc (USA)
AS59158 TY3CL1STA General Services Administration Federal Supply Service (USA)
AS59158 Society of Automotive Engineers Inc (USA)
3551-7 Stanley Engineered Fastening Llc (USA)
MIL-T-21309 TY3CL1STA General Services Administration Federal Supply Service (USA)
A-A-59158 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
Related Parts
5120-00-050-9731INTERCHANGEABLE
INSERTER,SCREW THREAD INSERT
2810-00-118-5522INTERCHANGEABLE
ADAPTER ASSEMBLY,VACUUM PUMP DRI
35517
5815-00-125-4995INTERCHANGEABLE
GUIDE
75517
5120-00-237-4669INTERCHANGEABLE
INSERTER,SCREW THREAD INSERT
5120-00-244-1710INTERCHANGEABLE
INSERTER,SCREW THREAD INSERT
5120-00-672-8897INTERCHANGEABLE
INSERTER,SCREW THREAD INSERT
HIT1220
5120-00-710-7435INTERCHANGEABLE
INSERTER,SCREW THREAD INSERT
5120-00-710-7437INTERCHANGEABLE
INSERTER,SCREW THREAD INSERT
5120-00-797-2402INTERCHANGEABLE
INSERTER,SCREW THREAD INSERT
5120-00-797-2404INTERCHANGEABLE
INSERTER,SCREW THREAD INSERT
5120-00-797-2405INTERCHANGEABLE
INSERTER,SCREW THREAD INSERT
5120-00-797-2407INTERCHANGEABLE
INSERTER,SCREW THREAD INSERT

Frequently Asked Questions

What is NSN 5120-00-797-2403?

NSN 5120-00-797-2403 is a Inserter,screw Thread Insert, 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 5120-00-797-2403?

NSN 5120-00-797-2403 has 9 cross-referenced part numbers: MIL-T-21309 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), AS59158 (Sae International Dba Sae International), A-A-59158 TY3CL1STA (General Services Administration Federal Supply Service), 7551-7 (Stanley Engineered Fastening Llc), AS59158 TY3CL1STA (General Services Administration Federal Supply Service) and 4 more.

What NSN replaces 5120-00-797-2403?

There are 12 known substitutes for 5120-00-797-2403: 5120-00-050-9731, 2810-00-118-5522, 5815-00-125-4995 and 9 more. 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: 7/16-14 UNIFIED NATIONAL COARSE (UNC); Specification/standard Data: 0U583-SAE AS59158 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD; Unit Type: PREWINDER; Nondefinitive Spec/std Data: 3 TYPE AND 1 CLASS AND A STYLE. 4 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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