PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

22300056Hammer Assembly,low

Waltham Aircraft Clock Corp · NSN 6645-00-535-4376 · FSC 6645 · No Item Name Available
Verified by PartsTable
NSN 6645-00-535-4376 — this item is cataloged by the U.S. Government under National Stock Number 6645-00-535-4376. Primary manufacturer part number: 22300056.
Features
  • Hammer Assembly,low — 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 Hammer Assembly,low, cataloged under National Stock Number 6645-00-535-4376, 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. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameHammer Assembly,low
FSC / FSG6645 — No Item Name Available (FSG 66)
ManufacturersWaltham Clock Co Inc (CAGE 79300); Waltham Aircraft Clock Corp (CAGE 0Y4A4)
Technical Specifications
ParameterValue
NSN6645-00-535-4376
Primary Part Number22300056
Item NameHammer Assembly,low
FSC / FSG6645 / 66 — No Item Name Available
ManufacturerWaltham Aircraft Clock Corp
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5340-00-090-475523037 INTERCHANGEABLE
Clamp,loop
Vse Aviation, Inc.
3110-00-151-8615495AX INTERCHANGEABLE
Cone and Rollers,tapered Roller
Rbc Bearings Incorporated Div West Trenton Division
5920-00-811-8879251002 INTERCHANGEABLE
Fuse,cartridge
Littelfuse, Inc.
4320-01-040-883823037 INTERCHANGEABLE
Impeller,pump,centrifugal
Industrial Technologies and Services Llc
5306-01-198-8058400-26280 ITEM 21 INTERCHANGEABLE
Bolt,machine
Moog Inc. Dba Ampac-Isp Corp
5330-01-556-458023037 INTERCHANGEABLE
Gasket and Seal Set
Parker-Hannifin Corporation Dba Racor Division Div Racor Division
Cross-Reference Index
Part NumberManufacturer
22300056 Waltham Clock Co Inc (USA)
22300056 PRIMARY Waltham Aircraft Clock Corp (USA)
23037 Waltham Clock Co Inc (USA)
Related Parts
5340-00-090-4755INTERCHANGEABLE
CLAMP,LOOP
23037
3110-00-151-8615INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
495AX
5920-00-811-8879INTERCHANGEABLE
FUSE,CARTRIDGE
251002
4320-01-040-8838INTERCHANGEABLE
IMPELLER,PUMP,CENTRIFUGAL
23037
5306-01-198-8058INTERCHANGEABLE
BOLT,MACHINE
400-26280 ITEM 21
5330-01-556-4580INTERCHANGEABLE
GASKET AND SEAL SET
23037

Frequently Asked Questions

What is NSN 6645-00-535-4376?

NSN 6645-00-535-4376 is a Hammer Assembly,low, manufactured by Waltham Aircraft Clock Corp, classified under FSC 6645 (No Item Name Available). Status: active.

What are the part numbers for NSN 6645-00-535-4376?

NSN 6645-00-535-4376 has 3 cross-referenced part numbers: 22300056 (Waltham Clock Co Inc), 22300056 (Waltham Aircraft Clock Corp), 23037 (Waltham Clock Co Inc).

What NSN replaces 6645-00-535-4376?

There are 6 known substitutes for 6645-00-535-4376: 5340-00-090-4755, 3110-00-151-8615, 5920-00-811-8879 and 3 more. Verify interchangeability with system specifications before substitution.

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