PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

C421Semiconductor Device,diode

Howell Instruments, Inc. Dba Howell Instruments Inc · NSN 5961-00-948-9231 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-00-948-9231 — this item is cataloged by the U.S. Government under National Stock Number 5961-00-948-9231. Primary manufacturer part number: C421.
Features
  • Semiconductor Device,diode — FSC 5961
  • 3 verified cross-references
  • Primary manufacturer: Howell Instruments, Inc. Dba Howell Instruments Inc
Applications
  • Circuit regulation and filtering
  • Signal conditioning
  • Power supply stabilization
General Description

The Semiconductor Device,diode, cataloged under National Stock Number 5961-00-948-9231, is classified within Federal Supply Class 5961 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Howell Instruments, Inc. Dba Howell Instruments Inc. This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Catalog Facts
Item NameSemiconductor Device,diode
FSC / FSG5961 — No Item Name Available (FSG 59)
ManufacturersHowell Instruments, Inc. Dba Howell Instruments Inc (CAGE 98869); Freescale Semiconductor, Inc. (CAGE 04713); Motorola Inc. Dba Integrated Information Systems Group (CAGE 94990)
Technical Specifications
ParameterValue
NSN5961-00-948-9231
Primary Part NumberC421
Item NameSemiconductor Device,diode
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerHowell Instruments, Inc. Dba Howell Instruments Inc
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 5
9150-00-261-8294C-421 INTERCHANGEABLE
Grease,plug Valve
Flowserve Us Inc. Dba Flowserve Div Flow Control - Oil and Gas Sector
3895-00-424-0576 INTERCHANGEABLE
Shaft,pulley
2920-00-455-5414353 INTERCHANGEABLE
Spark Plug
Allied-Signal Inc Autolite Div
5315-01-230-3699 INTERCHANGEABLE
Pin,grooved,headless
5999-01-609-2837C4-2-1 INTERCHANGEABLE
Control Unit,specia
Carlisle & Finch Co
Cross-Reference Index
Part NumberManufacturer
C421 PRIMARY Howell Instruments, Inc. Dba Howell Instruments Inc (USA)
SZ388 Freescale Semiconductor, Inc. (USA)
SZ388 Motorola Inc. Dba Integrated Information Systems Group (USA)
Related Parts
9150-00-261-8294INTERCHANGEABLE
GREASE,PLUG VALVE
C-421
3895-00-424-0576INTERCHANGEABLE
SHAFT,PULLEY
2920-00-455-5414INTERCHANGEABLE
SPARK PLUG
353
5315-01-230-3699INTERCHANGEABLE
PIN,GROOVED,HEADLESS
5999-01-609-2837INTERCHANGEABLE
CONTROL UNIT,SPECIA
C4-2-1

Frequently Asked Questions

What is NSN 5961-00-948-9231?

NSN 5961-00-948-9231 is a Semiconductor Device,diode, manufactured by Howell Instruments, Inc. Dba Howell Instruments Inc, classified under FSC 5961 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5961-00-948-9231?

NSN 5961-00-948-9231 has 3 cross-referenced part numbers: C421 (Howell Instruments, Inc. Dba Howell Instruments Inc), SZ388 (Freescale Semiconductor, Inc.), SZ388 (Motorola Inc. Dba Integrated Information Systems Group).

What NSN replaces 5961-00-948-9231?

There are 5 known substitutes for 5961-00-948-9231: 9150-00-261-8294, 3895-00-424-0576, 2920-00-455-5414 and 2 more. Verify interchangeability with system specifications before substitution.

Is NSN 5961-00-948-9231 still in active supply?

NSN 5961-00-948-9231 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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