PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

66-255Screwdriver,flat Tip

Apex Tool Group, Llc Dba Nicholson · NSN 5120-01-646-7760 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-646-7760 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-646-7760. Primary manufacturer part number: 66-255.
Features
  • Screwdriver,flat Tip — FSC 5120
  • Nondefinitive Spec/std Data: 1 TYPE AND 1 CLASS AND A STYLE
  • Length: 4.000 INCHES NOMINAL BLADE IN
  • Material: PLASTIC HANDLE
  • Width: 0.125 INCHES NOMINAL TIP IN
  • Features Provided: STRAIGHT TIP SIDES AND STRAIGHT FLUTED HANDLE
  • Specification/standard Data: 05047-ASME B107.600 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Shank Shape: ROUND
Applications
  • Applications requiring Plastic Handle construction
General Description

The Screwdriver,flat Tip, cataloged under National Stock Number 5120-01-646-7760, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Apex Tool Group, Llc Dba Nicholson. 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-646-7760
Primary Part Number66-255
Item NameScrewdriver,flat Tip
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerApex Tool Group, Llc Dba Nicholson
StatusACTIVE
Nondefinitive Spec/std Data1 TYPE AND 1 CLASS AND A STYLE
Length4.000 INCHES NOMINAL BLADE IN
MaterialPLASTIC HANDLE
Width0.125 INCHES NOMINAL TIP IN
Features ProvidedSTRAIGHT TIP SIDES AND STRAIGHT FLUTED HANDLE
Specification/standard Data05047-ASME B107.600 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Shank ShapeROUND
Thickness0.020 INCHES NOMINAL TIP IN
ColorBLACK AND BLUE HANDLE
MaterialSTEEL BLADE
Surface TreatmentCHROMIUM BLADE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5970-00-852-748720S840 INTERCHANGEABLE
Insulator,suspension
Ngk-Locke, Inc.
5330-01-266-8487 INTERCHANGEABLE
Gasket
5325-01-270-835466255 INTERCHANGEABLE
Ring,retaining
Eaton Aerospace, Llc Dba Jackson South
5950-01-649-476666255 INTERCHANGEABLE
Transformer,current
Generac Mobile Products, Llc
Cross-Reference Index
Part NumberManufacturer
66-255 Apex Tool Group, Llc Dba Nicholson (USA)
B107.600 TY1CL1STA General Services Administration Federal Supply Service (USA)
B107.600 The American Society of Mechanical Engineers (USA)
B107.15 TY1 General Services Administration Federal Supply Service (USA)
B107.15 The American Society of Mechanical Engineers (USA)
66-255 Armstrong Bros Tool Co (USA)
Related Parts
5970-00-852-7487INTERCHANGEABLE
INSULATOR,SUSPENSION
20S840
5330-01-266-8487INTERCHANGEABLE
GASKET
5325-01-270-8354INTERCHANGEABLE
RING,RETAINING
66255
5950-01-649-4766INTERCHANGEABLE
TRANSFORMER,CURRENT
66255

Frequently Asked Questions

What is NSN 5120-01-646-7760?

NSN 5120-01-646-7760 is a Screwdriver,flat Tip, manufactured by Apex Tool Group, Llc Dba Nicholson, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-646-7760?

NSN 5120-01-646-7760 has 6 cross-referenced part numbers: 66-255 (Apex Tool Group, Llc Dba Nicholson), B107.600 TY1CL1STA (General Services Administration Federal Supply Service), B107.600 (The American Society of Mechanical Engineers), B107.15 TY1 (General Services Administration Federal Supply Service), B107.15 (The American Society of Mechanical Engineers) and 1 more.

What NSN replaces 5120-01-646-7760?

There are 4 known substitutes for 5120-01-646-7760: 5970-00-852-7487, 5330-01-266-8487, 5325-01-270-8354 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 66-255?

Key specifications for 66-255: Nondefinitive Spec/std Data: 1 TYPE AND 1 CLASS AND A STYLE; Length: 4.000 INCHES NOMINAL BLADE IN; Material: PLASTIC HANDLE; Width: 0.125 INCHES NOMINAL TIP IN. 13 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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