PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1221Clip,electrical

Littelfuse, Inc. · NSN 5999-00-194-7747 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-00-194-7747 — this item is cataloged by the U.S. Government under National Stock Number 5999-00-194-7747. Primary manufacturer part number: 1221.
Features
  • Clip,electrical — FSC 5999
  • Precious Material and Weight: 0.005 SILVER GRAINS, TROY
  • Style Designator: FERRULE CLIP W/STOP
  • Precious Material: SILVER
  • Material: COPPER ALLOY BODY
  • Surface Treatment: SILVER BODY
  • Unthreaded Mounting Hole Diameter: 0.265 INCHES NOMINAL IN
  • Mounting Facility Quantity: 1
Applications
  • Applications requiring Copper Alloy Body construction
General Description

The Clip,electrical, cataloged under National Stock Number 5999-00-194-7747, is classified within Federal Supply Class 5999 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Littelfuse, Inc.. Government technical data includes 24 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 11 commercial cross-references from 8 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5999-00-194-7747
Primary Part Number1221
Item NameClip,electrical
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerLittelfuse, Inc.
StatusCANCELLED
Precious Material and Weight0.005 SILVER GRAINS, TROY
Style DesignatorFERRULE CLIP W/STOP
Precious MaterialSILVER
MaterialCOPPER ALLOY BODY
Surface TreatmentSILVER BODY
Unthreaded Mounting Hole Diameter0.265 INCHES NOMINAL IN
Mounting Facility Quantity1
Current Rating in Amps30.0
Voltage Rating in Volts250.0 DC
Hole Accommodation Diameter0.812 INCHES NOMINAL IN
Mounting MethodUNTHREADED HOLE(S)
Precious Material and LocationBODY SURFACE SILVER
Precious Material and Weight0.005 SILVER GRAINS, TROY
Style DesignatorFERRULE CLIP W/STOP
Precious MaterialSILVER
MaterialCOPPER ALLOY BODY
Surface TreatmentSILVER BODY
Unthreaded Mounting Hole Diameter0.265 INCHES NOMINAL IN
Mounting Facility Quantity1
Current Rating in Amps30.0
Voltage Rating in Volts250.0 DC
Hole Accommodation Diameter0.812 INCHES NOMINAL IN
Mounting MethodUNTHREADED HOLE(S)
Precious Material and LocationBODY SURFACE SILVER
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Shelf Life Code0
Criticality CodeQ
Unit of IssueEA
SMR CodeJZ
Weight0.0100 lbs
Cube0.0017 cu ft
Verified Substitutes 12
No Item Name Available
3110-00-198-2234 INTERCHANGEABLE
Cam Follower,needle Bearing
6625-00-278-6884122-1 INTERCHANGEABLE
Plug-in Unit,electrical-Electron
Sypris Electronics, Llc Div Sypris Electronics, Llc - Colorado Field Services
6145-00-335-13364016206-0701 INTERCHANGEABLE
Braid,wire
Raytheon Company Dba Raytheon Co
6675-00-378-9400 INTERCHANGEABLE
Insulation,vertical
5340-00-458-75301290-01 INTERCHANGEABLE
Seat,helical Compression Spring
Norgren C a Co
1005-00-803-638812-9001 INTERCHANGEABLE
Chute,ejection
Sai Industries Div Standard Armament Inc.
5920-00-840-7974L5621A INTERCHANGEABLE
Fuse,cartridge
Ets Lindgren Limited
5950-00-898-020060028 INTERCHANGEABLE
Transformer,audio Frequency
Dynalec Corporation
4720-00-990-168726523 INTERCHANGEABLE
Hose,preformed
Gates Corporation
Cross-Reference Index
Part NumberManufacturer
1221 PRIMARY Littelfuse, Inc. (USA)
215-509 Itt Industries Inc Itt Aerospace Communications Div East (USA)
E3SP Kolton Electric Mfg Co (USA)
129-001 Littelfuse, Inc. (USA)
101-055-3 Atlee of Delaware, Incorporated (USA)
M58 Barker & Williamson (USA)
JC0023 Rauland-Borg Corp (USA)
76A007 Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple (USA)
129-100 Barker & Williamson (USA)
129001 PRIMARY Littelfuse, Inc. (USA)
FC-1023-3 Bae Systems Information and Electronic Systems Integration Inc. (USA)
Related Parts
5999-00-501-5642SUCCESSOR
NO ITEM NAME AVAILABLE
3110-00-198-2234INTERCHANGEABLE
CAM FOLLOWER,NEEDLE BEARING
6625-00-278-6884INTERCHANGEABLE
PLUG-IN UNIT,ELECTRICAL-ELECTRON
122-1
6145-00-335-1336INTERCHANGEABLE
BRAID,WIRE
4016206-0701
6675-00-378-9400INTERCHANGEABLE
INSULATION,VERTICAL
5340-00-458-7530INTERCHANGEABLE
SEAT,HELICAL COMPRESSION SPRING
1290-01
1005-00-803-6388INTERCHANGEABLE
CHUTE,EJECTION
12-9001
5920-00-840-7974INTERCHANGEABLE
FUSE,CARTRIDGE
L5621A
5950-00-898-0200INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
60028
4720-00-990-1687INTERCHANGEABLE
HOSE,PREFORMED
26523
5855-01-027-3639INTERCHANGEABLE
HOUSING ASSEMBLY ENTRANCE WINDOW
SM-D-771333-1
6680-01-031-9659INTERCHANGEABLE
INDICATOR,SIGHT,LIQUID
M58

Frequently Asked Questions

What is NSN 5999-00-194-7747?

NSN 5999-00-194-7747 is a Clip,electrical, manufactured by Littelfuse, Inc., classified under FSC 5999 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5999-00-194-7747?

NSN 5999-00-194-7747 has 11 cross-referenced part numbers: 1221 (Littelfuse, Inc.), 215-509 (Itt Industries Inc Itt Aerospace Communications Div East), E3SP (Kolton Electric Mfg Co), 129-001 (Littelfuse, Inc.), 101-055-3 (Atlee of Delaware, Incorporated) and 6 more.

What NSN replaces 5999-00-194-7747?

There are 12 known substitutes for 5999-00-194-7747: 5999-00-501-5642, 3110-00-198-2234, 6625-00-278-6884 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1221?

Key specifications for 1221: Overall Width: 0.875 INCHES NOMINAL IN; Precious Material and Weight: 0.005 SILVER GRAINS, TROY; Style Designator: FERRULE CLIP W/STOP; Precious Material: SILVER. 30 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5999-00-194-7747 still in active supply?

NSN 5999-00-194-7747 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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