PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

250 PB2Bit,screwdriver

Qualtool Inc · NSN 5120-01-400-4021 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-400-4021 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-400-4021. Primary manufacturer part number: 250 PB2.
Features
  • Bit,screwdriver — FSC 5120
  • Shank Width Across Wrench Flats: 0.250 INCHES NOMINAL IN
  • Drive Shank Type: HEXAGON
  • Tip Type: PHILLIPS CROSS
  • Tip Size Designation: 2
  • 2 verified cross-references
  • Primary manufacturer: Qualtool Inc
Applications
  • Field maintenance and repair
  • Facility maintenance operations
  • General-purpose hand tools
General Description

The Bit,screwdriver, cataloged under National Stock Number 5120-01-400-4021, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Qualtool Inc. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5120-01-400-4021
Primary Part Number250 PB2
Item NameBit,screwdriver
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerQualtool Inc
StatusCANCELLED
Shank Width Across Wrench Flats0.250 INCHES NOMINAL IN
Drive Shank TypeHEXAGON
Tip TypePHILLIPS CROSS
Tip Size Designation2
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 10
3110-00-100-0743 INTERCHANGEABLE
Cone and Rollers,tapered Roller
1560-00-104-9246216-30604-1 INTERCHANGEABLE
Radome
Triumph Aerostructures, Llc Dba Triumph Aerostructures - Vought Integrated Programs Division
5340-00-126-8140SC-B-31336 INTERCHANGEABLE
Holder,spring
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
4320-00-148-0987 INTERCHANGEABLE
Shaft,transmission,pump
2010-00-213-04872548 INTERCHANGEABLE
Block,brake
Eaton Corporation Dba Airflex Div Div Airflex
5977-00-604-77452548 INTERCHANGEABLE
Holder,electrical Contact Brush
Carbone of America Corporation Div Superior Carbon Products Division
5975-00-685-9927 INTERCHANGEABLE
Box Connector,electrical
4730-00-931-7799AS1007D0406 INTERCHANGEABLE
Union,tube
Sae International Dba Sae International
4730-00-969-0546 INTERCHANGEABLE
Nipple,boss
5307-01-467-4241E-4952-TU INTERCHANGEABLE
Stud,bonded
Euclid Industries Inc
Cross-Reference Index
Part NumberManufacturer
250 PB2 PRIMARY Qualtool Inc (USA)
2548 PRIMARY Sioux Tools Inc (USA)
Related Parts
3110-00-100-0743INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
1560-00-104-9246INTERCHANGEABLE
RADOME
216-30604-1
5340-00-126-8140INTERCHANGEABLE
HOLDER,SPRING
SC-B-31336
4320-00-148-0987INTERCHANGEABLE
SHAFT,TRANSMISSION,PUMP
2010-00-213-0487INTERCHANGEABLE
BLOCK,BRAKE
2548
5977-00-604-7745INTERCHANGEABLE
HOLDER,ELECTRICAL CONTACT BRUSH
2548
5975-00-685-9927INTERCHANGEABLE
BOX CONNECTOR,ELECTRICAL
4730-00-931-7799INTERCHANGEABLE
UNION,TUBE
AS1007D0406
4730-00-969-0546INTERCHANGEABLE
NIPPLE,BOSS
5307-01-467-4241INTERCHANGEABLE
STUD,BONDED
E-4952-TU

Frequently Asked Questions

What is NSN 5120-01-400-4021?

NSN 5120-01-400-4021 is a Bit,screwdriver, manufactured by Qualtool Inc, classified under FSC 5120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5120-01-400-4021?

NSN 5120-01-400-4021 has 2 cross-referenced part numbers: 250 PB2 (Qualtool Inc), 2548 (Sioux Tools Inc).

What NSN replaces 5120-01-400-4021?

There are 10 known substitutes for 5120-01-400-4021: 3110-00-100-0743, 1560-00-104-9246, 5340-00-126-8140 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 250 PB2?

Key specifications for 250 PB2: Overall Length: 1.000 INCHES MAXIMUM IN; Shank Width Across Wrench Flats: 0.250 INCHES NOMINAL IN; Drive Shank Type: HEXAGON; Tip Type: PHILLIPS CROSS. 5 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-01-400-4021 still in active supply?

NSN 5120-01-400-4021 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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