PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1101 + 5101 + 5508Stereoscope,vision Testing

Mast Keystone Inc Dba Mast Development Company · NSN 6540-00-082-1657 · FSC 6540 · No Item Name Available
Verified by PartsTable
NSN 6540-00-082-1657 — this item is cataloged by the U.S. Government under National Stock Number 6540-00-082-1657. Primary manufacturer part number: 1101 + 5101 + 5508.
Features
  • Stereoscope,vision Testing — FSC 6540
  • Current Type: AC
  • Lens Quantity: 2
  • Furnished Items and Quantity: CARRYING CASE,1; DUST COVER,1; RECORD FORMS,1000; TEST STEREOGRAMS AND MANUALS,SETS,9
  • Lamp Quantity: 1
  • 4 verified cross-references
  • Primary manufacturer: Mast Keystone Inc Dba Mast Development Company
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Stereoscope,vision Testing, cataloged under National Stock Number 6540-00-082-1657, is classified within Federal Supply Class 6540 (No Item Name Available) of the Medical, Dental, and Veterinary Equipment group. The primary manufacturer of record is Mast Keystone Inc Dba Mast Development Company. Government technical data includes 4 verified specifications, 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6540-00-082-1657
Primary Part Number1101 + 5101 + 5508
Item NameStereoscope,vision Testing
FSC / FSG6540 / 65 — No Item Name Available
ManufacturerMast Keystone Inc Dba Mast Development Company
StatusACTIVE
Current TypeAC
Lens Quantity2
Furnished Items and QuantityCARRYING CASE,1; DUST COVER,1; RECORD FORMS,1000; TEST STEREOGRAMS AND MANUALS,SETS,9
Lamp Quantity1
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5996-00-143-4783591 INTERCHANGEABLE
Amplifier,electronic Control
Power Control Devices, Inc.
9540-00-148-4793 INTERCHANGEABLE
Beam,structural
2540-00-248-4603104-18 INTERCHANGEABLE
Blade,windshield Wiper
Trico Products Corporation
2920-00-351-6756AS681L INTERCHANGEABLE
Sleeve,ignition Terminal
Renk America Llc Div Renk America
6650-00-408-31052218 INTERCHANGEABLE
Lens,optical Instrument
Aerosonic Llc
9540-00-640-4229 INTERCHANGEABLE
Beam,structural
4720-00-967-8997 INTERCHANGEABLE
Hose,nonmetallic
5331-01-005-8367 INTERCHANGEABLE
O-Ring
5331-01-071-8790BACP11L218 INTERCHANGEABLE
O-Ring
The Boeing Company Div Commercial
4730-01-115-15182218 INTERCHANGEABLE
Strainer,sediment
O. C. Keckley Company
Cross-Reference Index
Part NumberManufacturer
B7DE Sperian Protection Optical, Inc. Div Sperian Optical (USA)
1101 + 5101 + 5508 PRIMARY Mast Keystone Inc Dba Mast Development Company (USA)
22-18 PRIMARY Mast Keystone Inc Dba Mast Development Company (USA)
B7DE Honeywell Safety Products Usa, Inc. (USA)
Related Parts
5996-00-143-4783INTERCHANGEABLE
AMPLIFIER,ELECTRONIC CONTROL
591
9540-00-148-4793INTERCHANGEABLE
BEAM,STRUCTURAL
2540-00-248-4603INTERCHANGEABLE
BLADE,WINDSHIELD WIPER
104-18
2920-00-351-6756INTERCHANGEABLE
SLEEVE,IGNITION TERMINAL
AS681L
6650-00-408-3105INTERCHANGEABLE
LENS,OPTICAL INSTRUMENT
2218
9540-00-640-4229INTERCHANGEABLE
BEAM,STRUCTURAL
4720-00-967-8997INTERCHANGEABLE
HOSE,NONMETALLIC
5331-01-005-8367INTERCHANGEABLE
O-RING
5331-01-071-8790INTERCHANGEABLE
O-RING
BACP11L218
4730-01-115-1518INTERCHANGEABLE
STRAINER,SEDIMENT
2218
5310-01-187-5867INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
2218
6220-01-201-2666INTERCHANGEABLE
STOP LIGHT-TAILLIGHT,VEHICULAR
4018

Frequently Asked Questions

What is NSN 6540-00-082-1657?

NSN 6540-00-082-1657 is a Stereoscope,vision Testing, manufactured by Mast Keystone Inc Dba Mast Development Company, classified under FSC 6540 (No Item Name Available). Status: active.

What are the part numbers for NSN 6540-00-082-1657?

NSN 6540-00-082-1657 has 4 cross-referenced part numbers: B7DE (Sperian Protection Optical, Inc. Div Sperian Optical), 1101 + 5101 + 5508 (Mast Keystone Inc Dba Mast Development Company), 22-18 (Mast Keystone Inc Dba Mast Development Company), B7DE (Honeywell Safety Products Usa, Inc.).

What NSN replaces 6540-00-082-1657?

There are 12 known substitutes for 6540-00-082-1657: 5996-00-143-4783, 9540-00-148-4793, 2540-00-248-4603 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1101 + 5101 + 5508?

Key specifications for 1101 + 5101 + 5508: Current Type: AC; Special Features: BUILT-IN ILLUMINATION SOURCE; W/ROTATING WAND AND DIAL POINTER; W/HEAD REST AND FIXATION TARGET; DRIVER TESTING,PORTABLE 115 V,60 HZ,AC,25WATTS; FOR REPLACEMENT LAMP ORDER ACCORDING TO MANUFACTURER AND MODEL V; Lens Quantity: 2; Furnished Items and Quantity: CARRYING CASE,1; DUST COVER,1; RECORD FORMS,1000; TEST STEREOGRAMS AND MANUALS,SETS,9. 6 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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