PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4108Ring,crystal Lock

Wakmann Watch Company Inc · NSN 6645-00-727-1554 · FSC 6645 · No Item Name Available
Verified by PartsTable
NSN 6645-00-727-1554 — this item is cataloged by the U.S. Government under National Stock Number 6645-00-727-1554. Primary manufacturer part number: 4108.
Features
  • Ring,crystal Lock — FSC 6645
  • 1 verified cross-reference
  • Primary manufacturer: Wakmann Watch Company Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Ring,crystal Lock, cataloged under National Stock Number 6645-00-727-1554, is classified within Federal Supply Class 6645 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Wakmann Watch Company Inc. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameRing,crystal Lock
FSC / FSG6645 — No Item Name Available (FSG 66)
ManufacturersWakmann Watch Company Inc (CAGE 98429)
Technical Specifications
ParameterValue
NSN6645-00-727-1554
Primary Part Number4108
Item NameRing,crystal Lock
FSC / FSG6645 / 66 — No Item Name Available
ManufacturerWakmann Watch Company Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
4730-00-011-46274-060110B INTERCHANGEABLE
Nut,tube Coupling
Sae International Dba Sae International
4030-00-243-4440 INTERCHANGEABLE
Clamp,wire Rope,saddled
5315-00-424-00344108 INTERCHANGEABLE
Pin,spring
Tyco Fire Products Lp
5355-00-667-62781444168 INTERCHANGEABLE
Knob
Naval Ship Systems Command
5940-00-761-1765410-GP-08 INTERCHANGEABLE
Terminal Board
Regal Beloit America, Inc
4460-00-908-5977 INTERCHANGEABLE
Air Purifier,dehydr
4930-01-005-4595 INTERCHANGEABLE
Lubricator,airline
9330-01-006-44477100022317 INTERCHANGEABLE
Plastic Strip,pressure Sensitive
3m Company
7510-01-016-0417 INTERCHANGEABLE
Tape,pressure Sensitive Adhesive
5940-01-461-62634108 INTERCHANGEABLE
Post,binding,electrical
Keystone Electronics Corp
Cross-Reference Index
Part NumberManufacturer
4108 PRIMARY Wakmann Watch Company Inc (USA)
Related Parts
4730-00-011-4627INTERCHANGEABLE
NUT,TUBE COUPLING
4-060110B
4030-00-243-4440INTERCHANGEABLE
CLAMP,WIRE ROPE,SADDLED
5315-00-424-0034INTERCHANGEABLE
PIN,SPRING
4108
5355-00-667-6278INTERCHANGEABLE
KNOB
1444168
5940-00-761-1765INTERCHANGEABLE
TERMINAL BOARD
410-GP-08
4460-00-908-5977INTERCHANGEABLE
AIR PURIFIER,DEHYDR
4930-01-005-4595INTERCHANGEABLE
LUBRICATOR,AIRLINE
9330-01-006-4447INTERCHANGEABLE
PLASTIC STRIP,PRESSURE SENSITIVE
7100022317
7510-01-016-0417INTERCHANGEABLE
TAPE,PRESSURE SENSITIVE ADHESIVE
5940-01-461-6263INTERCHANGEABLE
POST,BINDING,ELECTRICAL
4108
5440-01-623-3723INTERCHANGEABLE
SCAFFOLDING,UPPER SECTION
4108

Frequently Asked Questions

What is NSN 6645-00-727-1554?

NSN 6645-00-727-1554 is a Ring,crystal Lock, manufactured by Wakmann Watch Company Inc, classified under FSC 6645 (No Item Name Available). Status: active.

What are the part numbers for NSN 6645-00-727-1554?

NSN 6645-00-727-1554 has 1 cross-referenced part number: 4108 (Wakmann Watch Company Inc).

What NSN replaces 6645-00-727-1554?

There are 11 known substitutes for 6645-00-727-1554: 4730-00-011-4627, 4030-00-243-4440, 5315-00-424-0034 and 8 more. Verify interchangeability with system specifications before substitution.

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