PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4-4021Measuring Instrument,multi-Funct

Geier & Bluhm, Inc. · NSN 6695-01-691-2651 · FSC 6695 · No Item Name Available
Verified by PartsTable
NSN 6695-01-691-2651 — this item is cataloged by the U.S. Government under National Stock Number 6695-01-691-2651. Primary manufacturer part number: 4-4021.
Features
  • Measuring Instrument,multi-Funct — FSC 6695
  • Display Type: GAS DISCHARGE TUBE
  • Scale Type: STATIONARY
  • Scale Name: INCHES
  • 3 verified cross-references
  • Primary manufacturer: Geier & Bluhm, Inc.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Measuring Instrument,multi-Funct, cataloged under National Stock Number 6695-01-691-2651, is classified within Federal Supply Class 6695 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Geier & Bluhm, Inc.. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6695-01-691-2651
Primary Part Number4-4021
Item NameMeasuring Instrument,multi-Funct
FSC / FSG6695 / 66 — No Item Name Available
ManufacturerGeier & Bluhm, Inc.
StatusACTIVE
Display TypeGAS DISCHARGE TUBE
Scale TypeSTATIONARY
Scale NameINCHES
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5133-00-243-9613 INTERCHANGEABLE
Drill,twist
5930-00-296-646619H397-1 INTERCHANGEABLE
Switch,push
Westinghouse Electric Corp
5360-00-530-840522012A INTERCHANGEABLE
Spring,helical,compression
Brinkley Technology Group Llc Dba Hercules Manufacturing
5355-00-543-7183MS91531-2N2B INTERCHANGEABLE
Knob
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5999-00-795-478144021 INTERCHANGEABLE
Contact,electrical
L3harris Technologies, Inc. Div Space and Airborne Systems
2520-01-036-07964003833 INTERCHANGEABLE
Clutch Assembly,friction
Funk Mfg Co Sub of Deere and Co
5340-01-371-76544402-1 INTERCHANGEABLE
Bracket,angle
Tech Resources, Inc
6625-01-461-394444021 INTERCHANGEABLE
Ammeter
Exceltec Intl Corp
1420-01-486-49772215442-1 INTERCHANGEABLE
Cover,access,guided Missile
Raytheon Company
Cross-Reference Index
Part NumberManufacturer
4003833-1 Gichner Systems Group, Inc. Div C5isr Division (USA)
4003833 Gichner Systems Group, Inc. Div C5isr Division (USA)
4-4021 PRIMARY Geier & Bluhm, Inc. (USA)
Related Parts
5133-00-243-9613INTERCHANGEABLE
DRILL,TWIST
5930-00-296-6466INTERCHANGEABLE
SWITCH,PUSH
19H397-1
5360-00-530-8405INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
22012A
5355-00-543-7183INTERCHANGEABLE
KNOB
MS91531-2N2B
5999-00-795-4781INTERCHANGEABLE
CONTACT,ELECTRICAL
44021
2520-01-036-0796INTERCHANGEABLE
CLUTCH ASSEMBLY,FRICTION
4003833
5340-01-371-7654INTERCHANGEABLE
BRACKET,ANGLE
4402-1
6625-01-461-3944INTERCHANGEABLE
AMMETER
44021
1420-01-486-4977INTERCHANGEABLE
COVER,ACCESS,GUIDED MISSILE
2215442-1

Frequently Asked Questions

What is NSN 6695-01-691-2651?

NSN 6695-01-691-2651 is a Measuring Instrument,multi-Funct, manufactured by Geier & Bluhm, Inc., classified under FSC 6695 (No Item Name Available). Status: active.

What are the part numbers for NSN 6695-01-691-2651?

NSN 6695-01-691-2651 has 3 cross-referenced part numbers: 4003833-1 (Gichner Systems Group, Inc. Div C5isr Division), 4003833 (Gichner Systems Group, Inc. Div C5isr Division), 4-4021 (Geier & Bluhm, Inc.).

What NSN replaces 6695-01-691-2651?

There are 9 known substitutes for 6695-01-691-2651: 5133-00-243-9613, 5930-00-296-6466, 5360-00-530-8405 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4-4021?

Key specifications for 4-4021: Display Type: GAS DISCHARGE TUBE; Part Name Assigned by Controlling Agency: LEVEL, TUBULAR; Scale Type: STATIONARY; End Item Identification: SPACE RADAR. 5 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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