PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B-21Screwdriver,flat Tip

Ngk Metals Corporation Dba N G K Berylco · NSN 5120-01-278-4820 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-278-4820 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-278-4820. Primary manufacturer part number: B-21.
Features
  • Screwdriver,flat Tip — FSC 5120
  • Length: 10.000 INCHES NOMINAL BLADE IN
  • Material: PLASTIC HANDLE
  • Width: 0.125 INCHES NOMINAL TIP IN
  • Diameter: 0.188 INCHES NOMINAL SHANK IN
  • Material: COPPER ALLOY BLADE
  • Shank Shape: ROUND
  • Features Provided: NONSPARKING AND NONMAGNETIC
Applications
  • Applications requiring Plastic Handle construction
General Description

The Screwdriver,flat Tip, cataloged under National Stock Number 5120-01-278-4820, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Ngk Metals Corporation Dba N G K Berylco. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-278-4820
Primary Part NumberB-21
Item NameScrewdriver,flat Tip
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerNgk Metals Corporation Dba N G K Berylco
StatusACTIVE
Length10.000 INCHES NOMINAL BLADE IN
MaterialPLASTIC HANDLE
Width0.125 INCHES NOMINAL TIP IN
Diameter0.188 INCHES NOMINAL SHANK IN
MaterialCOPPER ALLOY BLADE
Shank ShapeROUND
Features ProvidedNONSPARKING AND NONMAGNETIC
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4730-00-014-2434SAE J512 7 040110B INTERCHANGEABLE
Inverted Nut,tube Coupling
Sae International Dba Sae International
5999-00-045-6309B2-1 INTERCHANGEABLE
Heater,thermal Release
Schneider Electric Usa, Inc.
5910-00-196-0084 INTERCHANGEABLE
Capacitor,fixed,ceramic Dielectr
7320-00-336-5641B21 INTERCHANGEABLE
Shaft Assy
Insinger Machine Co
6680-00-394-7334B21 INTERCHANGEABLE
Tip,triangular
Schulze Mfg., Inc.
5999-00-419-0228B21 INTERCHANGEABLE
Heater,thermal Release
Ward Leonard Ct Llc
5365-00-685-7023402265-2 INTERCHANGEABLE
Shim
Raytheon Company Dba Raytheon
4310-00-829-5001B21 INTERCHANGEABLE
Pin,piston
Gardner Denver Inc.
3110-01-070-7981 INTERCHANGEABLE
Bearing,ball,annular
3110-01-164-1107B-21 INTERCHANGEABLE
Collar,bearing
United States Monorail Corp Stanspec Div
Cross-Reference Index
Part NumberManufacturer
B-21-2328 Ngk Metals Corporation Dba N G K Berylco (USA)
B-21 PRIMARY Ngk Metals Corporation Dba N G K Berylco (USA)
Related Parts
4730-00-014-2434INTERCHANGEABLE
INVERTED NUT,TUBE COUPLING
SAE J512 7 040110B
5999-00-045-6309INTERCHANGEABLE
HEATER,THERMAL RELEASE
B2-1
5910-00-196-0084INTERCHANGEABLE
CAPACITOR,FIXED,CERAMIC DIELECTR
7320-00-336-5641INTERCHANGEABLE
SHAFT ASSY
B21
6680-00-394-7334INTERCHANGEABLE
TIP,TRIANGULAR
B21
5999-00-419-0228INTERCHANGEABLE
HEATER,THERMAL RELEASE
B21
5365-00-685-7023INTERCHANGEABLE
SHIM
402265-2
4310-00-829-5001INTERCHANGEABLE
PIN,PISTON
B21
3110-01-070-7981INTERCHANGEABLE
BEARING,BALL,ANNULAR
3110-01-164-1107INTERCHANGEABLE
COLLAR,BEARING
B-21
3010-01-284-5849INTERCHANGEABLE
DISC
B 21
5355-01-379-7666INTERCHANGEABLE
KNOB

Frequently Asked Questions

What is NSN 5120-01-278-4820?

NSN 5120-01-278-4820 is a Screwdriver,flat Tip, manufactured by Ngk Metals Corporation Dba N G K Berylco, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-278-4820?

NSN 5120-01-278-4820 has 2 cross-referenced part numbers: B-21-2328 (Ngk Metals Corporation Dba N G K Berylco), B-21 (Ngk Metals Corporation Dba N G K Berylco).

What NSN replaces 5120-01-278-4820?

There are 12 known substitutes for 5120-01-278-4820: 4730-00-014-2434, 5999-00-045-6309, 5910-00-196-0084 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of B-21?

Key specifications for B-21: Length: 10.000 INCHES NOMINAL BLADE IN; Overall Length: 13.000 INCHES NOMINAL IN; Material: PLASTIC HANDLE; Width: 0.125 INCHES NOMINAL TIP IN. 8 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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