PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

68121Circuit Card Assembly

Espey Mfg and Electronics Corp · NSN 5998-01-494-4452 · FSC 5998 · Circuit Card Assembly
Verified by PartsTable
NSN 5998-01-494-4452 — this item is cataloged by the U.S. Government under National Stock Number 5998-01-494-4452. Primary manufacturer part number: 68121.
Features
  • Circuit Card Assembly — FSC 5998
  • 2 verified cross-references
  • Primary manufacturer: Espey Mfg and Electronics Corp
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Circuit Card Assembly, cataloged under National Stock Number 5998-01-494-4452, is classified within Federal Supply Class 5998 (Circuit Card Assembly) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Espey Mfg and Electronics Corp. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5998-01-494-4452
Primary Part Number68121
Item NameCircuit Card Assembly
FSC / FSG5998 / 59 — Circuit Card Assembly
ManufacturerEspey Mfg and Electronics Corp
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5950-00-456-8441 INTERCHANGEABLE
Transformer,power
1660-00-593-51756812-1 INTERCHANGEABLE
Screen,regulator in
Avox Systems Inc Dba Avox Systems Inc
5340-00-807-240768121 INTERCHANGEABLE
Strap,retaining
Cummins Inc.
6515-01-350-3568681.21 INTERCHANGEABLE
Knife,eye
Grieshaber and Co Inc
3040-01-366-73136812-1 INTERCHANGEABLE
Connecting Link,rigid
Tyee Aircraft Inc Div Tyee Aircraft
5940-01-408-398768121 INTERCHANGEABLE
Terminal Junction Block,sectiona
Mersen Canada Toronto Inc
Cross-Reference Index
Part NumberManufacturer
68121 Espey Mfg and Electronics Corp (USA)
68121 Espey Mfg. & Electronics Corp. (USA)
Related Parts
5950-00-456-8441INTERCHANGEABLE
TRANSFORMER,POWER
1660-00-593-5175INTERCHANGEABLE
SCREEN,REGULATOR IN
6812-1
5340-00-807-2407INTERCHANGEABLE
STRAP,RETAINING
68121
6515-01-350-3568INTERCHANGEABLE
KNIFE,EYE
681.21
3040-01-366-7313INTERCHANGEABLE
CONNECTING LINK,RIGID
6812-1
5940-01-408-3987INTERCHANGEABLE
TERMINAL JUNCTION BLOCK,SECTIONA
68121

Frequently Asked Questions

What is NSN 5998-01-494-4452?

NSN 5998-01-494-4452 is a Circuit Card Assembly, manufactured by Espey Mfg and Electronics Corp, classified under FSC 5998 (Circuit Card Assembly). Status: active.

What are the part numbers for NSN 5998-01-494-4452?

NSN 5998-01-494-4452 has 2 cross-referenced part numbers: 68121 (Espey Mfg and Electronics Corp), 68121 (Espey Mfg. & Electronics Corp.).

What NSN replaces 5998-01-494-4452?

There are 6 known substitutes for 5998-01-494-4452: 5950-00-456-8441, 1660-00-593-5175, 5340-00-807-2407 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 68121?

Key specifications for 68121: Part Name Assigned by Controlling Agency: CIRCUIT CARD ASSEMBLY, A1; End Item Identification: VARIABLE BOOST TEST BOX, RAT 31SL, ESPEY MFG AND ELECTRONICS CORP; Part Name Assigned by Controlling Agency: CIRCUIT CARD ASSEMBLY, A1; End Item Identification: VARIABLE BOOST TEST BOX, RAT 31SL, ESPEY MFG AND ELECTRONICS CORP. 4 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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