PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1251-1556Contact,electrical

Keysight Technologies Inc · NSN 5999-00-165-0403 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-00-165-0403 — this item is cataloged by the U.S. Government under National Stock Number 5999-00-165-0403. Primary manufacturer part number: 1251-1556.
Features
  • Contact,electrical — FSC 5999
  • Mounting Method: TERMINAL
  • Overall Diameter: 0.059 INCHES MAXIMUM IN
  • Precious Material and Weight: 0.005 GOLD GRAINS, TROY
  • Precious Material and Location: BODY AND CONTACT SURFACES GOLD
  • Material: COPPER ALLOY 836 AND COPPER BODY AND CONTACT
  • Surface Treatment: GOLD AND NICKEL BODY AND CONTACT
  • Style Designator: CYLINDRICAL SHAPE
Applications
  • Applications requiring Copper Alloy 836 and Copper Body and Contact construction
General Description

The Contact,electrical, cataloged under National Stock Number 5999-00-165-0403, 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 Keysight Technologies Inc. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 7 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5999-00-165-0403
Primary Part Number1251-1556
Item NameContact,electrical
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerKeysight Technologies Inc
StatusACTIVE
Mounting MethodTERMINAL
Overall Diameter0.059 INCHES MAXIMUM IN
Precious Material and Weight0.005 GOLD GRAINS, TROY
Precious Material and LocationBODY AND CONTACT SURFACES GOLD
MaterialCOPPER ALLOY 836 AND COPPER BODY AND CONTACT
Surface TreatmentGOLD AND NICKEL BODY AND CONTACT
Style DesignatorCYLINDRICAL SHAPE
Precious MaterialGOLD
Mounting MethodTERMINAL
Overall Diameter0.059 INCHES MAXIMUM IN
Precious Material and Weight0.005 GOLD GRAINS, TROY
Precious Material and LocationBODY AND CONTACT SURFACES GOLD
MaterialCOPPER ALLOY 836 AND COPPER BODY AND CONTACT
Surface TreatmentGOLD AND NICKEL BODY AND CONTACT
Style DesignatorCYLINDRICAL SHAPE
Precious MaterialGOLD
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality CodeQ
Unit of IssueEA
SMR CodeDZ
Weight0.0200 lbs
Cube0.0006 cu ft
Verified Substitutes 1
4730-01-301-368721278 INTERCHANGEABLE
Repair Kit,pipe,emergency Damage
Indumar Products Inc
Cross-Reference Index
Part NumberManufacturer
1251-1556 Hewlett-Packard Company Dba HP (USA)
006-4844 Itt Cannon Rf Products (USA)
1251-1556 PRIMARY Keysight Technologies Inc (USA)
2112-00-0009 Wavetek Rf Products, Inc (USA)
6-330808-5 Te Connectivity Corporation (USA)
1251-1556 Keysight Technologies, Inc. (USA)
018-001738-005 Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple (USA)
Related Parts
4730-01-301-3687INTERCHANGEABLE
REPAIR KIT,PIPE,EMERGENCY DAMAGE
21278

Frequently Asked Questions

What is NSN 5999-00-165-0403?

NSN 5999-00-165-0403 is a Contact,electrical, manufactured by Keysight Technologies Inc, classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-00-165-0403?

NSN 5999-00-165-0403 has 7 cross-referenced part numbers: 1251-1556 (Hewlett-Packard Company Dba HP), 006-4844 (Itt Cannon Rf Products), 1251-1556 (Keysight Technologies Inc), 2112-00-0009 (Wavetek Rf Products, Inc), 6-330808-5 (Te Connectivity Corporation) and 2 more.

What NSN replaces 5999-00-165-0403?

There is 1 known substitute for 5999-00-165-0403: 4730-01-301-3687. Verify interchangeability with system specifications before substitution.

What are the specifications of 1251-1556?

Key specifications for 1251-1556: Mounting Method: TERMINAL; Overall Diameter: 0.059 INCHES MAXIMUM IN; Overall Length: 0.134 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN; Precious Material and Weight: 0.005 GOLD GRAINS, TROY. 18 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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