PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21-326Contact,electrical

Eaton Corp Opns & Technical Center · NSN 5999-00-035-7980 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-00-035-7980 — this item is cataloged by the U.S. Government under National Stock Number 5999-00-035-7980. Primary manufacturer part number: 21-326.
Features
  • Contact,electrical — FSC 5999
  • Material: COPPER ALLOY CONTACT
  • Surface Treatment: GOLD BODY
  • Precious Material: SILVER
  • Precious Material and Location: EXTERNAL SURFACE SILVER
  • Precious Material and Weight: 0.005 SILVER GRAINS, TROY
  • Mounting Method: UNTHREADED HOLE(S)
  • Voltage Rating in Volts: 110.0 AC
Applications
  • Applications requiring Copper Alloy Contact construction
General Description

The Contact,electrical, cataloged under National Stock Number 5999-00-035-7980, 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 Eaton Corp Opns & Technical Center. Government technical data includes 28 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5999-00-035-7980
Primary Part Number21-326
Item NameContact,electrical
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerEaton Corp Opns & Technical Center
StatusACTIVE
MaterialCOPPER ALLOY CONTACT
Surface TreatmentGOLD BODY
Precious MaterialSILVER
Precious Material and LocationEXTERNAL SURFACE SILVER
Precious Material and Weight0.005 SILVER GRAINS, TROY
Mounting MethodUNTHREADED HOLE(S)
Voltage Rating in Volts110.0 AC
Mounting Facility Quantity1
Current Rating in Amps10.0
Unthreaded Mounting Hole Diameter0.180 INCHES NOMINAL IN
Style DesignatorLEAF TAP CONTACT W/ ROUND FIXED POINT
Surface TreatmentGOLD CONTACT
Point Diameter0.125 INCHES NOMINAL IN
MaterialCOPPER ALLOY BODY
MaterialCOPPER ALLOY CONTACT
Surface TreatmentGOLD BODY
Precious MaterialSILVER
Precious Material and LocationEXTERNAL SURFACE SILVER
Precious Material and Weight0.005 SILVER GRAINS, TROY
Mounting MethodUNTHREADED HOLE(S)
Voltage Rating in Volts110.0 AC
Mounting Facility Quantity1
Current Rating in Amps10.0
Unthreaded Mounting Hole Diameter0.180 INCHES NOMINAL IN
Style DesignatorLEAF TAP CONTACT W/ ROUND FIXED POINT
Surface TreatmentGOLD CONTACT
Point Diameter0.125 INCHES NOMINAL IN
MaterialCOPPER ALLOY BODY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Unit of IssueEA
SMR CodeX
Verified Substitutes 6
4320-00-374-9845912021 INTERCHANGEABLE
Vane Set,rotary
Eaton Aerospace, Llc Dba Jackson South
9540-00-540-594110133-0701 INTERCHANGEABLE
Angle,structural
Transtar Metals Corp
5950-00-824-0739VT2 INTERCHANGEABLE
Transformer,power
Ohmite Holding, L.l.c. Dba Ohmite Manufacturing
5840-01-098-838721326 INTERCHANGEABLE
Sub Panel Assembly
Smiths Aerospace, Inc., Electronic Systems-Grand Rapids
3010-01-191-782721326 INTERCHANGEABLE
Insert,flexible Coupling
Moog Inc. Dba Ampac-Isp Corp
4820-01-417-190721326-001 INTERCHANGEABLE
Valve,linear,directional Control
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
Cross-Reference Index
Part NumberManufacturer
21-326 PRIMARY Eaton Corp Opns & Technical Center (USA)
Related Parts
4320-00-374-9845INTERCHANGEABLE
VANE SET,ROTARY
912021
9540-00-540-5941INTERCHANGEABLE
ANGLE,STRUCTURAL
10133-0701
5950-00-824-0739INTERCHANGEABLE
TRANSFORMER,POWER
VT2
5840-01-098-8387INTERCHANGEABLE
SUB PANEL ASSEMBLY
21326
3010-01-191-7827INTERCHANGEABLE
INSERT,FLEXIBLE COUPLING
21326
4820-01-417-1907INTERCHANGEABLE
VALVE,LINEAR,DIRECTIONAL CONTROL
21326-001

Frequently Asked Questions

What is NSN 5999-00-035-7980?

NSN 5999-00-035-7980 is a Contact,electrical, manufactured by Eaton Corp Opns & Technical Center, classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-00-035-7980?

NSN 5999-00-035-7980 has 1 cross-referenced part number: 21-326 (Eaton Corp Opns & Technical Center).

What NSN replaces 5999-00-035-7980?

There are 6 known substitutes for 5999-00-035-7980: 4320-00-374-9845, 9540-00-540-5941, 5950-00-824-0739 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21-326?

Key specifications for 21-326: Material: COPPER ALLOY CONTACT; Surface Treatment: GOLD BODY; Precious Material: SILVER; Precious Material and Location: EXTERNAL SURFACE SILVER. 30 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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