PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

666642Cap,electrical

Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier · NSN 5999-00-257-7684 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-00-257-7684 — this item is cataloged by the U.S. Government under National Stock Number 5999-00-257-7684. Primary manufacturer part number: 666642.
Features
  • Cap,electrical — FSC 5999
  • Diameter: 1.172 INCHES NOMINAL IN
  • Insert: INCLUDED
  • Length: 1.063 INCHES NOMINAL IN
  • Mounting Method: FORCE FIT
  • Usage Design: CAP FOR SOCKET
  • Chain: NOT INCLUDED
  • Material: STEEL BODY
Applications
  • Applications requiring Steel Body construction
General Description

The Cap,electrical, cataloged under National Stock Number 5999-00-257-7684, 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 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 12 commercial cross-references from 9 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
NSN5999-00-257-7684
Primary Part Number666642
Item NameCap,electrical
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerNavair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
StatusCANCELLED
Diameter1.172 INCHES NOMINAL IN
InsertINCLUDED
Length1.063 INCHES NOMINAL IN
Mounting MethodFORCE FIT
Usage DesignCAP FOR SOCKET
ChainNOT INCLUDED
MaterialSTEEL BODY
MaterialPAPER INSERT
Surface TreatmentZINC AND CHROMIUM
Diameter1.172 INCHES NOMINAL IN
InsertINCLUDED
Length1.063 INCHES NOMINAL IN
Mounting MethodFORCE FIT
Usage DesignCAP FOR SOCKET
ChainNOT INCLUDED
MaterialSTEEL BODY
MaterialPAPER INSERT
Surface TreatmentZINC AND CHROMIUM
Lifecycle & Compliance
Acquisition StatusCANCELLED
Successor6625-00-408-7345
HAZMATNo
Verified Substitutes 10
6625-00-305-1979317 SUCCESSOR
Oscillator Subassembly
Keysight Technologies Inc
Probe,test
6625-00-734-4416327-103 SUCCESSOR
Probe,test
Halsit Holdings Llc Div Halsit Holdings, Llc Dba Abbatron
6625-00-971-1236317 SUCCESSOR
Oscilloscope
Tektronix, Inc.
6810-00-247-0597 INTERCHANGEABLE
Potassium Thiocyanate
5360-00-291-51208994 INTERCHANGEABLE
Spring,helical,compression
Arvinmeritor Inc
6750-00-295-854486317 INTERCHANGEABLE
Paper,photographic
Rexham Graphics Inc
5365-01-307-4304 INTERCHANGEABLE
Spacer,sleeve
5950-01-597-7576666642 INTERCHANGEABLE
Transformer,power
General Electric Company
5355-01-729-5910148790 INTERCHANGEABLE
Window,dial
Mueller Co
Cross-Reference Index
Part NumberManufacturer
P3-17 Amphenol Corp Spectra-Strip/itd (USA)
BA28417ISSUE2 At and T Corp (USA)
666642 PRIMARY Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
3-17 Amphenol Corp Div Amphenol Aerospace Operations (USA)
697-012798 Viasys Respiratory Care Inc. Dba Biosys Healthcare (USA)
BA28417ISSUE2 Lucent Technologies Inc Advanced Technology Systems (USA)
8131858 PRIMARY Us Army Aviation and Missile Command (USA)
86-3-17 Almo Electronics Inc (USA)
3-17 Amphenol Corp Spectra-Strip/itd (USA)
108088-1 L3harris Technologies, Inc. Dba Harris Corp Div Antenna Products (USA)
P3-17 Amphenol Corp Div Amphenol Aerospace Operations (USA)
BA28417ISS2 At and T Corp (USA)
Related Parts
SUCCESSOR 6625-00-408-7345 Probe,test
6625-00-305-1979SUCCESSOR
OSCILLATOR SUBASSEMBLY
317
6625-00-734-4416SUCCESSOR
PROBE,TEST
327-103
6625-00-971-1236SUCCESSOR
OSCILLOSCOPE
317
6810-00-247-0597INTERCHANGEABLE
POTASSIUM THIOCYANATE
5360-00-291-5120INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
8994
6750-00-295-8544INTERCHANGEABLE
PAPER,PHOTOGRAPHIC
86317
5365-01-307-4304INTERCHANGEABLE
SPACER,SLEEVE
5950-01-597-7576INTERCHANGEABLE
TRANSFORMER,POWER
666642
5355-01-729-5910INTERCHANGEABLE
WINDOW,DIAL
148790

Frequently Asked Questions

What is NSN 5999-00-257-7684?

NSN 5999-00-257-7684 is a Cap,electrical, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 5999 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5999-00-257-7684?

NSN 5999-00-257-7684 has 12 cross-referenced part numbers: P3-17 (Amphenol Corp Spectra-Strip/itd), BA28417ISSUE2 (At and T Corp), 666642 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 3-17 (Amphenol Corp Div Amphenol Aerospace Operations), 697-012798 (Viasys Respiratory Care Inc. Dba Biosys Healthcare) and 7 more.

What NSN replaces 5999-00-257-7684?

There are 10 known substitutes for 5999-00-257-7684: 6625-00-305-1979, 6625-00-408-7345, 6625-00-734-4416 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 666642?

Key specifications for 666642: Diameter: 1.172 INCHES NOMINAL IN; Insert: INCLUDED; Length: 1.063 INCHES NOMINAL IN; Mounting Method: FORCE FIT. 18 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5999-00-257-7684 still in active supply?

NSN 5999-00-257-7684 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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