PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

22300900Regulator Assy,cloc

Waltham Aircraft Clock Corp · NSN 6645-00-536-1538 · FSC 6645 · No Item Name Available
Verified by PartsTable
NSN 6645-00-536-1538 — this item is cataloged by the U.S. Government under National Stock Number 6645-00-536-1538. Primary manufacturer part number: 22300900.
Features
  • Regulator Assy,cloc — FSC 6645
  • 3 verified cross-references
  • Primary manufacturer: Waltham Aircraft Clock Corp
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Regulator Assy,cloc, cataloged under National Stock Number 6645-00-536-1538, is classified within Federal Supply Class 6645 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Waltham Aircraft Clock Corp. This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6645-00-536-1538
Primary Part Number22300900
Item NameRegulator Assy,cloc
FSC / FSG6645 / 66 — No Item Name Available
ManufacturerWaltham Aircraft Clock Corp
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 8
5305-00-071-2087 INTERCHANGEABLE
Screw,machine
5133-00-227-5967 INTERCHANGEABLE
Drill,twist
3433-00-275-12363-112 SIZE 2 INTERCHANGEABLE
Tip,cutting Torch
Uniweld Products, Inc. Dba Uniweld Products Inc
5330-00-493-380923112 INTERCHANGEABLE
Gasket
Itt Marlow a Unit of Itt Pumps and Compressors Div
4720-00-540-27781540-12 INTERCHANGEABLE
Hose,nonmetallic
Danfoss Power Solutions II, Llc
5355-00-584-5908 INTERCHANGEABLE
Knob
5910-01-137-086723112 INTERCHANGEABLE
Capacitor,fixed,metallized,paper
Smiths Aerospace, Inc., Electronic Systems-Grand Rapids
4820-01-417-582523112 INTERCHANGEABLE
Sleeve,directional Control Linea
Parker Hannifin Corporation Div Hydraulic Systems Division
Cross-Reference Index
Part NumberManufacturer
23112 Waltham Clock Co Inc (USA)
22300900 PRIMARY Waltham Aircraft Clock Corp (USA)
22300900 Waltham Clock Co Inc (USA)
Related Parts
5305-00-071-2087INTERCHANGEABLE
SCREW,MACHINE
5133-00-227-5967INTERCHANGEABLE
DRILL,TWIST
3433-00-275-1236INTERCHANGEABLE
TIP,CUTTING TORCH
3-112 SIZE 2
5330-00-493-3809INTERCHANGEABLE
GASKET
23112
4720-00-540-2778INTERCHANGEABLE
HOSE,NONMETALLIC
1540-12
5355-00-584-5908INTERCHANGEABLE
KNOB
5910-01-137-0867INTERCHANGEABLE
CAPACITOR,FIXED,METALLIZED,PAPER
23112
4820-01-417-5825INTERCHANGEABLE
SLEEVE,DIRECTIONAL CONTROL LINEA
23112

Frequently Asked Questions

What is NSN 6645-00-536-1538?

NSN 6645-00-536-1538 is a Regulator Assy,cloc, manufactured by Waltham Aircraft Clock Corp, classified under FSC 6645 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6645-00-536-1538?

NSN 6645-00-536-1538 has 3 cross-referenced part numbers: 23112 (Waltham Clock Co Inc), 22300900 (Waltham Aircraft Clock Corp), 22300900 (Waltham Clock Co Inc).

What NSN replaces 6645-00-536-1538?

There are 8 known substitutes for 6645-00-536-1538: 5305-00-071-2087, 5133-00-227-5967, 3433-00-275-1236 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 22300900?

Key specifications for 22300900: Part Name Assigned by Controlling Agency: REGULATOR ASSY. 1 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6645-00-536-1538 still in active supply?

NSN 6645-00-536-1538 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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