PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-T-21309Extractor,screw Thread Insert

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5120-00-251-1527 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-251-1527 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-251-1527. Primary manufacturer part number: MIL-T-21309.
Features
  • Extractor,screw Thread Insert — FSC 5120
  • Environmental Attribute Code: PLASTICS REMOVAL IN THE MARINE ENVIRONMENT (PRIME) PRODUCT
  • Thread Size and Series/type Designator: 7/16 TO 1 UNIFIED NATIONAL COARSE (UNC) OR 7/16 TO 1 UNF
  • Material: STEEL
  • Specification/standard Data: 0U583-SAE AS59158 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Nondefinitive Spec/std Data: 5 TYPE
  • 16 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
  • Applications requiring Steel construction
General Description

The Extractor,screw Thread Insert, cataloged under National Stock Number 5120-00-251-1527, 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 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 16 commercial cross-references from 13 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5120-00-251-1527
Primary Part NumberMIL-T-21309
Item NameExtractor,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
StatusCANCELLED
Environmental Attribute CodePLASTICS REMOVAL IN THE MARINE ENVIRONMENT (PRIME) PRODUCT
Thread Size and Series/type Designator7/16 TO 1 UNIFIED NATIONAL COARSE (UNC) OR 7/16 TO 1 UNF
MaterialSTEEL
Specification/standard Data0U583-SAE AS59158 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Nondefinitive Spec/std Data5 TYPE
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 8
5180-00-054-7519 INTERCHANGEABLE
Tool Kit,screw Thread Insert
5120-00-138-6803 INTERCHANGEABLE
Extractor,screw Thread Insert
5120-00-245-9539 INTERCHANGEABLE
Extractor,screw Thread Insert
5120-00-723-6833ET10 INTERCHANGEABLE
Extractor,screw Thread Insert
Helical Wire Inc
5120-00-804-6059 INTERCHANGEABLE
Extractor,screw Thread Insert
2540-01-197-4588122716PS INTERCHANGEABLE
Seat,vehicular
Seats Inc Div Seats Incorporated
6515-01-443-683612-2716 INTERCHANGEABLE
Pin,fixation,orthopedic
Smith and Nephew Inc
4730-01-678-217729-86 INTERCHANGEABLE
Adapter,straight,pipe to Hose
Alkon Corporation
Cross-Reference Index
Part NumberManufacturer
MIL-T-21309 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
5120PL0911688 Jednolity Indeks Materialowy - Uniform Material Index (POL)
AS59158 TY5 General Services Administration Federal Supply Service (USA)
MIL-T-21309 TY5 General Services Administration Federal Supply Service (USA)
64595 Textron Lycoming Inc Williamsport Plant (USA)
5120002511527 E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales
A-A-59158 TY5 General Services Administration Federal Supply Service (USA)
AS59158 Society of Automotive Engineers Inc (USA)
10086319 Nimikkeistokeskus Ncb Finland (FIN)
7751056 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
A-A-59158 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
5120004855129 E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales
64595 Satair A/s (DNK)
1709063 Turbo-Union Ltd (GBR)
1227-16 Stanley Engineered Fastening Llc (USA)
AS59158 Sae International Dba Sae International (USA)
Related Parts
5180-00-054-7519INTERCHANGEABLE
TOOL KIT,SCREW THREAD INSERT
5120-00-138-6803INTERCHANGEABLE
EXTRACTOR,SCREW THREAD INSERT
5120-00-245-9539INTERCHANGEABLE
EXTRACTOR,SCREW THREAD INSERT
5120-00-723-6833INTERCHANGEABLE
EXTRACTOR,SCREW THREAD INSERT
ET10
5120-00-804-6059INTERCHANGEABLE
EXTRACTOR,SCREW THREAD INSERT
2540-01-197-4588INTERCHANGEABLE
SEAT,VEHICULAR
122716PS
6515-01-443-6836INTERCHANGEABLE
PIN,FIXATION,ORTHOPEDIC
12-2716
4730-01-678-2177INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO HOSE
29-86

Frequently Asked Questions

What is NSN 5120-00-251-1527?

NSN 5120-00-251-1527 is a Extractor,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: cancelled.

What are the part numbers for NSN 5120-00-251-1527?

NSN 5120-00-251-1527 has 16 cross-referenced part numbers: MIL-T-21309 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 5120PL0911688 (Jednolity Indeks Materialowy - Uniform Material Index), AS59158 TY5 (General Services Administration Federal Supply Service), MIL-T-21309 TY5 (General Services Administration Federal Supply Service), 64595 (Textron Lycoming Inc Williamsport Plant) and 11 more.

What NSN replaces 5120-00-251-1527?

There are 8 known substitutes for 5120-00-251-1527: 5180-00-054-7519, 5120-00-138-6803, 5120-00-245-9539 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-T-21309?

Key specifications for MIL-T-21309: Environmental Attribute Code: PLASTICS REMOVAL IN THE MARINE ENVIRONMENT (PRIME) PRODUCT; Special Features: 5-1/16 INCHES OAL IN; Thread Size and Series/type Designator: 7/16 TO 1 UNIFIED NATIONAL COARSE (UNC) OR 7/16 TO 1 UNF; Material: STEEL. 6 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-00-251-1527 still in active supply?

NSN 5120-00-251-1527 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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