PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21657Modem,communications

Motorola/codex Corp Sub of Motorola Inc · NSN 5895-01-384-5623 · FSC 5895 · No Item Name Available
Verified by PartsTable
NSN 5895-01-384-5623 — this item is cataloged by the U.S. Government under National Stock Number 5895-01-384-5623. Primary manufacturer part number: 21657.
Features
  • Modem,communications — FSC 5895
  • Type/model Designation: 3345
  • Type/model Designation: 3345
  • 2 verified cross-references
  • Primary manufacturer: Motorola/codex Corp Sub of Motorola Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Modem,communications, cataloged under National Stock Number 5895-01-384-5623, is classified within Federal Supply Class 5895 (No Item Name Available) of the Communication, Detection, and Coherent Radiation Equipment group. The primary manufacturer of record is Motorola/codex Corp Sub of Motorola Inc. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5895-01-384-5623
Primary Part Number21657
Item NameModem,communications
FSC / FSG5895 / 58 — No Item Name Available
ManufacturerMotorola/codex Corp Sub of Motorola Inc
StatusACTIVE
Type/model Designation3345
Type/model Designation3345
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5905-00-115-7216 INTERCHANGEABLE
Resistor,variable,wire Wound,non
2530-00-350-64925590650 INTERCHANGEABLE
Filter,fluid
U S Army Tank Automotive Command Amsta-Im-Mm
6685-00-488-5591 INTERCHANGEABLE
Thermometer,self-Indicating,bime
5330-00-997-1909 INTERCHANGEABLE
Packing,preformed
4730-01-036-9487 INTERCHANGEABLE
Adapter,straight,pipe to Boss
5310-01-327-906421657 INTERCHANGEABLE
Washer,spring Tension
Parker Hannifin Corporation Div Hydraulic Systems Division
5310-01-413-899621657 INTERCHANGEABLE
Washer,spring Tension
Industrial Technologies and Services Llc
4720-01-434-7947 INTERCHANGEABLE
Hose Assembly,nonmetallic
4140-01-545-680021657 INTERCHANGEABLE
Fan,circulating
Itw Gse Inc.
5963-01-652-9908 INTERCHANGEABLE
Electronic Module,standardized
Cross-Reference Index
Part NumberManufacturer
28984W/OPT26958 Motorola/codex Corp Sub of Motorola Inc (USA)
21657 PRIMARY Motorola/codex Corp Sub of Motorola Inc (USA)
Related Parts
5905-00-115-7216INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,NON
2530-00-350-6492INTERCHANGEABLE
FILTER,FLUID
5590650
6685-00-488-5591INTERCHANGEABLE
THERMOMETER,SELF-INDICATING,BIME
5330-00-997-1909INTERCHANGEABLE
PACKING,PREFORMED
4730-01-036-9487INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO BOSS
5310-01-327-9064INTERCHANGEABLE
WASHER,SPRING TENSION
21657
5310-01-413-8996INTERCHANGEABLE
WASHER,SPRING TENSION
21657
4720-01-434-7947INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC
4140-01-545-6800INTERCHANGEABLE
FAN,CIRCULATING
21657
5963-01-652-9908INTERCHANGEABLE
ELECTRONIC MODULE,STANDARDIZED

Frequently Asked Questions

What is NSN 5895-01-384-5623?

NSN 5895-01-384-5623 is a Modem,communications, manufactured by Motorola/codex Corp Sub of Motorola Inc, classified under FSC 5895 (No Item Name Available). Status: active.

What are the part numbers for NSN 5895-01-384-5623?

NSN 5895-01-384-5623 has 2 cross-referenced part numbers: 28984W/OPT26958 (Motorola/codex Corp Sub of Motorola Inc), 21657 (Motorola/codex Corp Sub of Motorola Inc).

What NSN replaces 5895-01-384-5623?

There are 10 known substitutes for 5895-01-384-5623: 5905-00-115-7216, 2530-00-350-6492, 6685-00-488-5591 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21657?

Key specifications for 21657: Special Features: BASE UNIT HAS 2 CHANNELS; WITH A 4 CHANNEL OPTION; Type/model Designation: 3345; Special Features: BASE UNIT HAS 2 CHANNELS; WITH A 4 CHANNEL OPTION; Type/model Designation: 3345. 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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