PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

X101Attenuator,variable

Telephonics Corp/prd Instruments · NSN 5985-00-910-9958 · FSC 5985 · No Item Name Available
Verified by PartsTable
NSN 5985-00-910-9958 — this item is cataloged by the U.S. Government under National Stock Number 5985-00-910-9958. Primary manufacturer part number: X101.
Features
  • Attenuator,variable — FSC 5985
  • Application Design: WAVEGUIDE
  • Mounting Facility Screw Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
  • Mounting Thread Quantity: 20 PER INCH
  • Terminal Type and Quantity: 2 FLANGE
  • Frequency Range: 8.200 GIGAHERTZ MINIMUM AND 12.400 GIGAHERTZ MAXIMUM
  • Mounting Facility Nominal Screw Thread Diameter: 0.250 INCHES IN
  • Overall Attenuation Range in Decibels: +0.0 TO 6.0
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Attenuator,variable, cataloged under National Stock Number 5985-00-910-9958, is classified within Federal Supply Class 5985 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Telephonics Corp/prd Instruments. Government technical data includes 12 verified specifications, 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. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5985-00-910-9958
Primary Part NumberX101
Item NameAttenuator,variable
FSC / FSG5985 / 59 — No Item Name Available
ManufacturerTelephonics Corp/prd Instruments
StatusACTIVE
Application DesignWAVEGUIDE
Mounting Facility Screw Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Mounting Thread Quantity20 PER INCH
Terminal Type and Quantity2 FLANGE
Frequency Range8.200 GIGAHERTZ MINIMUM AND 12.400 GIGAHERTZ MAXIMUM
Mounting Facility Nominal Screw Thread Diameter0.250 INCHES IN
Overall Attenuation Range in Decibels+0.0 TO 6.0
Mounting Facility Type and Quantity4 THREADED HOLE(S)
Voltage Standing Wave Ratio1.00 AND 1.15
Overall Attenuation Accuracy in Decibels-0.06 TO 0.06
Power Rating10.0 WATTS AVERAGE
Attenuation Variation MethodCONTINUOUS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
4730-00-021-918925060-34-6 INTERCHANGEABLE
Plug,pipe
Hdt Expeditionary Systems Inc
5120-00-116-3276 INTERCHANGEABLE
Die,crimping Tool
5120-00-240-8716 INTERCHANGEABLE
Screwdriver,cross Tip
4810-00-831-3158C2607E INTERCHANGEABLE
Indicator,valve Position
Griswold Industries Dba Cla-Val Co
5930-01-025-222460114 INTERCHANGEABLE
Switch,rotary
Dynalec Corporation
3950-01-067-0674SA28449-B INTERCHANGEABLE
Coil,brake
Kone Crane Dba Shepard Niles
4820-01-273-76939789801K INTERCHANGEABLE
Indicator,valve Opening
Griswold Industries Dba Cla-Val Co
5955-01-371-37365M1858-001 INTERCHANGEABLE
Oscillator,crystal Controlled
The Boeing Company Div Defense
8465-01-631-3767X101 INTERCHANGEABLE
Bag,specific Purpose,cloth (fabr
Exoskel Group Usa Inc
Cross-Reference Index
Part NumberManufacturer
X101 PRIMARY Telephonics Corp/prd Instruments (USA)
X101 Peraton Inc (USA)
Related Parts
4730-00-021-9189INTERCHANGEABLE
PLUG,PIPE
25060-34-6
5120-00-116-3276INTERCHANGEABLE
DIE,CRIMPING TOOL
5120-00-240-8716INTERCHANGEABLE
SCREWDRIVER,CROSS TIP
4810-00-831-3158INTERCHANGEABLE
INDICATOR,VALVE POSITION
C2607E
5930-01-025-2224INTERCHANGEABLE
SWITCH,ROTARY
60114
3950-01-067-0674INTERCHANGEABLE
COIL,BRAKE
SA28449-B
4820-01-273-7693INTERCHANGEABLE
INDICATOR,VALVE OPENING
9789801K
5955-01-371-3736INTERCHANGEABLE
OSCILLATOR,CRYSTAL CONTROLLED
5M1858-001
8465-01-631-3767INTERCHANGEABLE
BAG,SPECIFIC PURPOSE,CLOTH (FABR
X101

Frequently Asked Questions

What is NSN 5985-00-910-9958?

NSN 5985-00-910-9958 is a Attenuator,variable, manufactured by Telephonics Corp/prd Instruments, classified under FSC 5985 (No Item Name Available). Status: active.

What are the part numbers for NSN 5985-00-910-9958?

NSN 5985-00-910-9958 has 2 cross-referenced part numbers: X101 (Telephonics Corp/prd Instruments), X101 (Peraton Inc).

What NSN replaces 5985-00-910-9958?

There are 9 known substitutes for 5985-00-910-9958: 4730-00-021-9189, 5120-00-116-3276, 5120-00-240-8716 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of X101?

Key specifications for X101: Application Design: WAVEGUIDE; Mounting Facility Screw Thread Series Designator: UNIFIED NATIONAL COARSE (UNC); Mounting Thread Quantity: 20 PER INCH; Overall Width: 6.375 INCHES NOMINAL IN. 15 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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