PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3724-20Inserter,screw Thread Insert

Stanley Engineered Fastening Llc · NSN 5120-01-032-4050 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-032-4050 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-032-4050. Primary manufacturer part number: 3724-20.
Features
  • Inserter,screw Thread Insert — FSC 5120
  • Thread Size and Series/type Designator: 1-1/4-7 UNIFIED NATIONAL COARSE (UNC)
  • Nondefinitive Spec/std Data: 3 TYPE AND 2 CLASS AND B STYLE
  • Unit Type: MANDREL
  • 5 verified cross-references
  • Primary manufacturer: Stanley Engineered Fastening Llc
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Inserter,screw Thread Insert, cataloged under National Stock Number 5120-01-032-4050, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Stanley Engineered Fastening Llc. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-032-4050
Primary Part Number3724-20
Item NameInserter,screw Thread Insert
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerStanley Engineered Fastening Llc
StatusACTIVE
Thread Size and Series/type Designator1-1/4-7 UNIFIED NATIONAL COARSE (UNC)
Nondefinitive Spec/std Data3 TYPE AND 2 CLASS AND B STYLE
Unit TypeMANDREL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5120-00-555-9497 INTERCHANGEABLE
Inserter,screw Thread Insert
3040-00-608-8792372420 INTERCHANGEABLE
Shaft,shouldered
Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix
5120-00-804-6052 INTERCHANGEABLE
Inserter,screw Thread Insert
5120-00-804-6053 INTERCHANGEABLE
Inserter,screw Thread Insert
5120-00-804-6054 INTERCHANGEABLE
Inserter,screw Thread Insert
Cross-Reference Index
Part NumberManufacturer
3724-20 PRIMARY Stanley Engineered Fastening Llc (USA)
A-A-59158 TY3CL2STB General Services Administration Federal Supply Service (USA)
A-A-59158 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
MIL-T-21309 TY3CL2STB General Services Administration Federal Supply Service (USA)
MIL-T-21309 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5120-00-555-9497INTERCHANGEABLE
INSERTER,SCREW THREAD INSERT
3040-00-608-8792INTERCHANGEABLE
SHAFT,SHOULDERED
372420
5120-00-804-6052INTERCHANGEABLE
INSERTER,SCREW THREAD INSERT
5120-00-804-6053INTERCHANGEABLE
INSERTER,SCREW THREAD INSERT
5120-00-804-6054INTERCHANGEABLE
INSERTER,SCREW THREAD INSERT

Frequently Asked Questions

What is NSN 5120-01-032-4050?

NSN 5120-01-032-4050 is a Inserter,screw Thread Insert, manufactured by Stanley Engineered Fastening Llc, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-032-4050?

NSN 5120-01-032-4050 has 5 cross-referenced part numbers: 3724-20 (Stanley Engineered Fastening Llc), A-A-59158 TY3CL2STB (General Services Administration Federal Supply Service), A-A-59158 (Federal Commercial Item Description Promulgated by General Services Administration Washington DC), MIL-T-21309 TY3CL2STB (General Services Administration Federal Supply Service), MIL-T-21309 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5120-01-032-4050?

There are 5 known substitutes for 5120-01-032-4050: 5120-00-555-9497, 3040-00-608-8792, 5120-00-804-6052 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3724-20?

Key specifications for 3724-20: Thread Size and Series/type Designator: 1-1/4-7 UNIFIED NATIONAL COARSE (UNC); Nondefinitive Spec/std Data: 3 TYPE AND 2 CLASS AND B STYLE; Unit Type: MANDREL. 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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