PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

RS300Stopwatch

Faehr Electronic Timers Inc · NSN 6645-01-378-2996 · FSC 6645 · No Item Name Available
Verified by PartsTable
NSN 6645-01-378-2996 — this item is cataloged by the U.S. Government under National Stock Number 6645-01-378-2996. Primary manufacturer part number: RS300.
Features
  • Stopwatch — FSC 6645
  • Material: PLASTIC CASE
  • Display Type: LIQUID CRYSTAL
  • Sweep Hand Quantity: 0
  • Control Method: PUSH BUTTON ON SIDE OF CASE
  • Maximum Running Time: 40.0 HOURS
  • 2 verified cross-references
  • Primary manufacturer: Faehr Electronic Timers Inc
Applications
  • Applications requiring Plastic Case construction
General Description

The Stopwatch, cataloged under National Stock Number 6645-01-378-2996, is classified within Federal Supply Class 6645 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Faehr Electronic Timers Inc. Government technical data includes 5 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6645-01-378-2996
Primary Part NumberRS300
Item NameStopwatch
FSC / FSG6645 / 66 — No Item Name Available
ManufacturerFaehr Electronic Timers Inc
StatusACTIVE
MaterialPLASTIC CASE
Display TypeLIQUID CRYSTAL
Sweep Hand Quantity0
Control MethodPUSH BUTTON ON SIDE OF CASE
Maximum Running Time40.0 HOURS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5325-00-857-5033 INTERCHANGEABLE
Ring,retaining
6625-00-950-4477 INTERCHANGEABLE
Multimeter
6645-01-106-4302 INTERCHANGEABLE
Stopwatch
6645-01-376-2329S602XE INTERCHANGEABLE
Stopwatch
Accusplit Inc
6645-01-376-2330AX725BK INTERCHANGEABLE
Stopwatch
Accusplit Inc
6645-01-376-2331A601XBK INTERCHANGEABLE
Stopwatch
Accusplit Inc
6645-01-376-2335AX605 INTERCHANGEABLE
Stopwatch
Accusplit Inc
6645-01-376-2336S3MAGXLBK INTERCHANGEABLE
Stopwatch
Accusplit Inc
6645-01-380-0946LC5000 INTERCHANGEABLE
Stopwatch
Faehr Electronic Timers Inc
6645-01-380-0990 INTERCHANGEABLE
Stopwatch
Cross-Reference Index
Part NumberManufacturer
RS300 Faehr Electronic Timers Inc (USA)
CVC STOPWATCH Dla Aviation Engineering Div Department of Defense (USA)
Related Parts
5325-00-857-5033INTERCHANGEABLE
RING,RETAINING
6625-00-950-4477INTERCHANGEABLE
MULTIMETER
6645-01-106-4302INTERCHANGEABLE
STOPWATCH
6645-01-376-2329INTERCHANGEABLE
STOPWATCH
S602XE
6645-01-376-2330INTERCHANGEABLE
STOPWATCH
AX725BK
6645-01-376-2331INTERCHANGEABLE
STOPWATCH
A601XBK
6645-01-376-2335INTERCHANGEABLE
STOPWATCH
AX605
6645-01-376-2336INTERCHANGEABLE
STOPWATCH
S3MAGXLBK
6645-01-380-0946INTERCHANGEABLE
STOPWATCH
LC5000
6645-01-380-0990INTERCHANGEABLE
STOPWATCH
6645-01-380-1075INTERCHANGEABLE
STOPWATCH
RS500
6645-01-380-1172INTERCHANGEABLE
STOPWATCH

Frequently Asked Questions

What is NSN 6645-01-378-2996?

NSN 6645-01-378-2996 is a Stopwatch, manufactured by Faehr Electronic Timers Inc, classified under FSC 6645 (No Item Name Available). Status: active.

What are the part numbers for NSN 6645-01-378-2996?

NSN 6645-01-378-2996 has 2 cross-referenced part numbers: RS300 (Faehr Electronic Timers Inc), CVC STOPWATCH (Dla Aviation Engineering Div Department of Defense).

What NSN replaces 6645-01-378-2996?

There are 12 known substitutes for 6645-01-378-2996: 5325-00-857-5033, 6625-00-950-4477, 6645-01-106-4302 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of RS300?

Key specifications for RS300: Material: PLASTIC CASE; Display Type: LIQUID CRYSTAL; Sweep Hand Quantity: 0; Control Method: PUSH BUTTON ON SIDE OF CASE. 6 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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