PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1908-3Test Set,signal Summing Unit

Safe Flight Instrument, Llc · NSN 4920-01-029-7641 · FSC 4920 · No Item Name Available
Verified by PartsTable
NSN 4920-01-029-7641 — this item is cataloged by the U.S. Government under National Stock Number 4920-01-029-7641. Primary manufacturer part number: 1908-3.
Features
  • Test Set,signal Summing Unit — FSC 4920
  • Reference Data and Literature: TO 5F22-14-3H
  • 1 verified cross-reference
  • Primary manufacturer: Safe Flight Instrument, Llc
Applications
  • Maintenance depot operations
  • Field repair and servicing
  • Vehicle maintenance facilities
General Description

The Test Set,signal Summing Unit, cataloged under National Stock Number 4920-01-029-7641, is classified within Federal Supply Class 4920 (No Item Name Available) of the Maintenance and Repair Shop Equipment group. The primary manufacturer of record is Safe Flight Instrument, Llc. Government technical data includes 1 verified specification, 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. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4920-01-029-7641
Primary Part Number1908-3
Item NameTest Set,signal Summing Unit
FSC / FSG4920 / 49 — No Item Name Available
ManufacturerSafe Flight Instrument, Llc
StatusACTIVE
Reference Data and LiteratureTO 5F22-14-3H
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5360-00-008-213219083 INTERCHANGEABLE
Spring,helical,compression
Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division
5305-00-088-9044 INTERCHANGEABLE
Screw,machine
3455-00-109-474519083 INTERCHANGEABLE
Reamer,shell,fluted
Briggs and Stratton Corp
3110-00-144-8826 INTERCHANGEABLE
Bearing,ball,annular
1670-00-721-52151.9083 INTERCHANGEABLE
Canopy,ejection Seat
Life Support International Inc
2530-01-311-8410A23105G1151 INTERCHANGEABLE
Parts Kit,brake Adjuster
Meritor Heavy Vehicle Systems, Llc
6550-01-343-562119-083 INTERCHANGEABLE
Bacteria Culture Control Discs
Remel Inc.
5998-01-353-631419084 INTERCHANGEABLE
Circuit Card Assembly
Creating Technology Solutions, Llc Dba Technology Research Corp Div Technology Research Corp
1005-01-713-929419083 INTERCHANGEABLE
Cover Assembly,machine Gun
Barrett Firearms Manufacturing, Inc. Dba Barrett Firearms Manufacturing Inc
Cross-Reference Index
Part NumberManufacturer
1908-3 PRIMARY Safe Flight Instrument, Llc (USA)
Related Parts
5360-00-008-2132INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
19083
5305-00-088-9044INTERCHANGEABLE
SCREW,MACHINE
3455-00-109-4745INTERCHANGEABLE
REAMER,SHELL,FLUTED
19083
3110-00-144-8826INTERCHANGEABLE
BEARING,BALL,ANNULAR
1670-00-721-5215INTERCHANGEABLE
CANOPY,EJECTION SEAT
1.9083
2530-01-311-8410INTERCHANGEABLE
PARTS KIT,BRAKE ADJUSTER
A23105G1151
6550-01-343-5621INTERCHANGEABLE
BACTERIA CULTURE CONTROL DISCS
19-083
5998-01-353-6314INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
19084
1005-01-713-9294INTERCHANGEABLE
COVER ASSEMBLY,MACHINE GUN
19083

Frequently Asked Questions

What is NSN 4920-01-029-7641?

NSN 4920-01-029-7641 is a Test Set,signal Summing Unit, manufactured by Safe Flight Instrument, Llc, classified under FSC 4920 (No Item Name Available). Status: active.

What are the part numbers for NSN 4920-01-029-7641?

NSN 4920-01-029-7641 has 1 cross-referenced part number: 1908-3 (Safe Flight Instrument, Llc).

What NSN replaces 4920-01-029-7641?

There are 9 known substitutes for 4920-01-029-7641: 5360-00-008-2132, 5305-00-088-9044, 3455-00-109-4745 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1908-3?

Key specifications for 1908-3: Reference Data and Literature: TO 5F22-14-3H; Part Name Assigned by Controlling Agency: SIGNAL SUMMING UNIT TEST SET; End Item Identification: E-3A AWACS SIGNAL SUMMING UNIT C-07206, C-07406, C-07606 A. 3 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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