PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

66-166-AScrewdriver,flat Tip

The Stanley Works Dba Stanley Proto · NSN 5120-01-603-8291 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-603-8291 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-603-8291. Primary manufacturer part number: 66-166-A.
Features
  • Screwdriver,flat Tip — FSC 5120
  • Material: PLASTIC HANDLE
  • Specification/standard Data: 05047-ASME B107.600 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Nondefinitive Spec/std Data: 1 TYPE AND 1 CLASS AND B STYLE
  • Material: STEEL BLADE
  • Length: 6.000 INCHES NOMINAL BLADE IN
  • Color: BLACK AND YELLOW HANDLE
  • Diameter: 0.313 INCHES NOMINAL SHANK IN
Applications
  • Applications requiring Plastic Handle construction
General Description

The Screwdriver,flat Tip, cataloged under National Stock Number 5120-01-603-8291, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is The Stanley Works Dba Stanley Proto. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-603-8291
Primary Part Number66-166-A
Item NameScrewdriver,flat Tip
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerThe Stanley Works Dba Stanley Proto
StatusACTIVE
MaterialPLASTIC HANDLE
Specification/standard Data05047-ASME B107.600 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Nondefinitive Spec/std Data1 TYPE AND 1 CLASS AND B STYLE
MaterialSTEEL BLADE
Length6.000 INCHES NOMINAL BLADE IN
ColorBLACK AND YELLOW HANDLE
Diameter0.313 INCHES NOMINAL SHANK IN
Features ProvidedFLARED TIP SIDE AND STRAIGHT FLUTED HANDLE
Width0.313 INCHES NOMINAL TIP IN
Surface TreatmentCHROMIUM BLADE
Shank ShapeROUND
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5955-00-483-4447538002-6 INTERCHANGEABLE
Crystal Unit,quartz
Raytheon Company Dba Raytheon
4320-00-928-2445066-07659-000 INTERCHANGEABLE
Ring,wearing
Aqua-Chem, Inc. Dba Aqua-Chem Inc
Cross-Reference Index
Part NumberManufacturer
66-166-A PRIMARY The Stanley Works Dba Stanley Proto (USA)
66-166 The Stanley Works Dba Stanley Proto (USA)
66-166 Stanley Tools Div of Stanley Works (USA)
B107.600 The American Society of Mechanical Engineers (USA)
B107.600 TY1CL1STB General Services Administration Federal Supply Service (USA)
66-166-A PRIMARY Stanley Tools Div of Stanley Works (USA)
Related Parts
5955-00-483-4447INTERCHANGEABLE
CRYSTAL UNIT,QUARTZ
538002-6
4320-00-928-2445INTERCHANGEABLE
RING,WEARING
066-07659-000

Frequently Asked Questions

What is NSN 5120-01-603-8291?

NSN 5120-01-603-8291 is a Screwdriver,flat Tip, manufactured by The Stanley Works Dba Stanley Proto, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-603-8291?

NSN 5120-01-603-8291 has 6 cross-referenced part numbers: 66-166-A (The Stanley Works Dba Stanley Proto), 66-166 (The Stanley Works Dba Stanley Proto), 66-166 (Stanley Tools Div of Stanley Works), B107.600 (The American Society of Mechanical Engineers), B107.600 TY1CL1STB (General Services Administration Federal Supply Service) and 1 more.

What NSN replaces 5120-01-603-8291?

There are 2 known substitutes for 5120-01-603-8291: 5955-00-483-4447, 4320-00-928-2445. Verify interchangeability with system specifications before substitution.

What are the specifications of 66-166-A?

Key specifications for 66-166-A: Material: PLASTIC HANDLE; Specification/standard Data: 05047-ASME B107.600 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD; Nondefinitive Spec/std Data: 1 TYPE AND 1 CLASS AND B STYLE; Material: STEEL BLADE. 12 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com