PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1221643Mounting Kit

General Motors Corp Delco Electronics Div · NSN 5961-00-421-5571 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-00-421-5571 — this item is cataloged by the U.S. Government under National Stock Number 5961-00-421-5571. Primary manufacturer part number: 1221643.
Features
  • Mounting Kit — FSC 5961
  • General Characteristics Item Description: CONSISTS OF 1 MICA INSULATOR,1 INSULATING BUSHING,1 MICA WASHER,1 METALWASHER,1 SOLDER LUG,1 HEX NUT,APPLICABLE TO TO-36 CASE
  • 2 verified cross-references
  • Primary manufacturer: General Motors Corp Delco Electronics Div
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Mounting Kit, cataloged under National Stock Number 5961-00-421-5571, 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 General Motors Corp Delco Electronics Div. Government technical data includes 1 verified specification, 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5961-00-421-5571
Primary Part Number1221643
Item NameMounting Kit
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerGeneral Motors Corp Delco Electronics Div
StatusACTIVE
General Characteristics Item DescriptionCONSISTS OF 1 MICA INSULATOR,1 INSULATING BUSHING,1 MICA WASHER,1 METALWASHER,1 SOLDER LUG,1 HEX NUT,APPLICABLE TO TO-36 CASE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
4940-00-555-2073F2000 INTERCHANGEABLE
Degreaser
Randall Mfg. Co., Inc.
5220-01-264-9699NCG030 INTERCHANGEABLE
Gage,profile
Little Rhody Machine Repair Inc
Cross-Reference Index
Part NumberManufacturer
1221643 General Motors Corp Delco Electronics Div (USA)
MK30 Freescale Semiconductor, Inc. (USA)
Related Parts
4940-00-555-2073INTERCHANGEABLE
DEGREASER
F2000
5220-01-264-9699INTERCHANGEABLE
GAGE,PROFILE
NCG030

Frequently Asked Questions

What is NSN 5961-00-421-5571?

NSN 5961-00-421-5571 is a Mounting Kit, manufactured by General Motors Corp Delco Electronics Div, classified under FSC 5961 (No Item Name Available). Status: active.

What are the part numbers for NSN 5961-00-421-5571?

NSN 5961-00-421-5571 has 2 cross-referenced part numbers: 1221643 (General Motors Corp Delco Electronics Div), MK30 (Freescale Semiconductor, Inc.).

What NSN replaces 5961-00-421-5571?

There are 2 known substitutes for 5961-00-421-5571: 4940-00-555-2073, 5220-01-264-9699. Verify interchangeability with system specifications before substitution.

What are the specifications of 1221643?

Key specifications for 1221643: General Characteristics Item Description: CONSISTS OF 1 MICA INSULATOR,1 INSULATING BUSHING,1 MICA WASHER,1 METALWASHER,1 SOLDER LUG,1 HEX NUT,APPLICABLE TO TO-36 CASE. 1 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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