PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

124UClock,digital

E S Enterprises · NSN 6645-01-013-6254 · FSC 6645 · No Item Name Available
Verified by PartsTable
NSN 6645-01-013-6254 — this item is cataloged by the U.S. Government under National Stock Number 6645-01-013-6254. Primary manufacturer part number: 124U.
Features
  • Clock,digital — FSC 6645
  • General Characteristics Item Description: 24 HOUR CLOCK,6 DIGITS,3 CONTROLS FOR SETTING FAST ADVANCE,SLOW ADVANCE AND HOLD,SOLID STATE MTD ON PRINTED CIRCUIT BOARD,7 SEGMENT TUBES FOR DISPLAY,117 VAC,50/60 HZ,10 WATTS MAX OPERATING VOLTAGE,O/A DIM. 8.000 IN. LG,5.625 IN. W,2.750 IN. H,CASE ALUMINUM VAC
  • 4 verified cross-references
  • Primary manufacturer: E S Enterprises
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Clock,digital, cataloged under National Stock Number 6645-01-013-6254, is classified within Federal Supply Class 6645 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is E S Enterprises. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6645-01-013-6254
Primary Part Number124U
Item NameClock,digital
FSC / FSG6645 / 66 — No Item Name Available
ManufacturerE S Enterprises
StatusACTIVE
General Characteristics Item Description24 HOUR CLOCK,6 DIGITS,3 CONTROLS FOR SETTING FAST ADVANCE,SLOW ADVANCE AND HOLD,SOLID STATE MTD ON PRINTED CIRCUIT BOARD,7 SEGMENT TUBES FOR DISPLAY,117 VAC,50/60 HZ,10 WATTS MAX OPERATING VOLTAGE,O/A DIM. 8.000 IN. LG,5.625 IN. W,2.750 IN. H,CASE ALUMINUM VAC
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
4730-00-288-9930157221 INTERCHANGEABLE
Adapter,straight,pipe to Tube
U S Army Tank Automotive Command Amsta-Im-Mm
6640-00-501-549631262 INTERCHANGEABLE
Oven,laboratory
Precision Scientific Petroleum Instruments Co
5210-00-813-6644124A INTERCHANGEABLE
Caliper,micrometer,inside
L.s. Starrett Company (the) Div Tool Division
5996-01-037-2084 INTERCHANGEABLE
Amplifier,audio-Radio Frequency
6240-01-100-12171816UNB INTERCHANGEABLE
Lamp,incandescent
Chicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron
6530-01-345-7845124A INTERCHANGEABLE
Table,utility,hospital
S and S X-Ray Products Inc
3431-01-533-8337I-24A INTERCHANGEABLE
Feeder,wire,welding
Miller Electric Mfg. Llc
5340-01-585-2311124A INTERCHANGEABLE
Handle,manual Control
T and S Brass and Bronze Works Inc
Cross-Reference Index
Part NumberManufacturer
124A Naval Electronic Systems Engineering Center (USA)
124U PRIMARY E S Enterprises (USA)
ES-124UE Mod-Electronics, Inc (USA)
124E E S Enterprises (USA)
Related Parts
4730-00-288-9930INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO TUBE
157221
6640-00-501-5496INTERCHANGEABLE
OVEN,LABORATORY
31262
5210-00-813-6644INTERCHANGEABLE
CALIPER,MICROMETER,INSIDE
124A
5996-01-037-2084INTERCHANGEABLE
AMPLIFIER,AUDIO-RADIO FREQUENCY
6240-01-100-1217INTERCHANGEABLE
LAMP,INCANDESCENT
1816UNB
6530-01-345-7845INTERCHANGEABLE
TABLE,UTILITY,HOSPITAL
124A
3431-01-533-8337INTERCHANGEABLE
FEEDER,WIRE,WELDING
I-24A
5340-01-585-2311INTERCHANGEABLE
HANDLE,MANUAL CONTROL
124A

Frequently Asked Questions

What is NSN 6645-01-013-6254?

NSN 6645-01-013-6254 is a Clock,digital, manufactured by E S Enterprises, classified under FSC 6645 (No Item Name Available). Status: active.

What are the part numbers for NSN 6645-01-013-6254?

NSN 6645-01-013-6254 has 4 cross-referenced part numbers: 124A (Naval Electronic Systems Engineering Center), 124U (E S Enterprises), ES-124UE (Mod-Electronics, Inc), 124E (E S Enterprises).

What NSN replaces 6645-01-013-6254?

There are 8 known substitutes for 6645-01-013-6254: 4730-00-288-9930, 6640-00-501-5496, 5210-00-813-6644 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 124U?

Key specifications for 124U: General Characteristics Item Description: 24 HOUR CLOCK,6 DIGITS,3 CONTROLS FOR SETTING FAST ADVANCE,SLOW ADVANCE AND HOLD,SOLID STATE MTD ON PRINTED CIRCUIT BOARD,7 SEGMENT TUBES FOR DISPLAY,117 VAC,50/60 HZ,10 WATTS MAX OPERATING VOLTAGE,O/A DIM. 8.000 IN. LG,5.625 IN. W,2.750 IN. H,CASE ALUMINUM VAC. 1 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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