PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

52-22Front,spectacle

Square D Co Monroe Plant · NSN 6540-01-158-3606 · FSC 6540 · No Item Name Available
Verified by PartsTable
NSN 6540-01-158-3606 — this item is cataloged by the U.S. Government under National Stock Number 6540-01-158-3606. Primary manufacturer part number: 52-22.
Features
  • Front,spectacle — FSC 6540
  • Eye Wire Maximum Horizontal Inside Diameter: 52.0 MILLIMETERS MM
  • End Piece Type: DOUBLE SCREW
  • Color: BROWN
  • Bridge Width: 22.0 MILLIMETERS MM
  • Style Designator: KEYHOLE BRIDGE WITH RIGID NOSE PADS
  • 1 verified cross-reference
  • Primary manufacturer: Square D Co Monroe Plant
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Front,spectacle, cataloged under National Stock Number 6540-01-158-3606, 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 Square D Co Monroe Plant. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, 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
NSN6540-01-158-3606
Primary Part Number52-22
Item NameFront,spectacle
FSC / FSG6540 / 65 — No Item Name Available
ManufacturerSquare D Co Monroe Plant
StatusACTIVE
Eye Wire Maximum Horizontal Inside Diameter52.0 MILLIMETERS MM
End Piece TypeDOUBLE SCREW
ColorBROWN
Bridge Width22.0 MILLIMETERS MM
Style DesignatorKEYHOLE BRIDGE WITH RIGID NOSE PADS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
Handle,bail
3110-00-156-53965222 INTERCHANGEABLE
Bearing,ball,annular
Federal-Mogul Corp Government Sales Dept
3110-00-156-7997 INTERCHANGEABLE
Bearing,ball,annular
4510-00-273-1220 INTERCHANGEABLE
Handle,faucet
5975-00-482-2664HBL5222 INTERCHANGEABLE
Plate,wall,electrical
Hubbell Incorporated (delaware) Dba Wiring Device-Kellems Division
5330-00-765-2915G8-055041 INTERCHANGEABLE
Gasket
Norwalk Compreseer Company Inc Dba Norwalk Compressor Company
4730-00-849-0552 INTERCHANGEABLE
Strainer Element,sediment
4130-01-018-8225714975-1 INTERCHANGEABLE
Boot,air Conditioning
Raytheon Company Div Rmd Strategic
2530-01-123-87904271395 INTERCHANGEABLE
Caliper,disc Brake
Chrysler Corp Service and Parts Opns
5120-01-399-9540 INTERCHANGEABLE
Socket,socket Wrench
Cross-Reference Index
Part NumberManufacturer
52-22 PRIMARY Square D Co Monroe Plant (USA)
Related Parts
5340-00-163-2639SUCCESSOR
HANDLE,BAIL
3110-00-156-5396INTERCHANGEABLE
BEARING,BALL,ANNULAR
5222
3110-00-156-7997INTERCHANGEABLE
BEARING,BALL,ANNULAR
4510-00-273-1220INTERCHANGEABLE
HANDLE,FAUCET
5975-00-482-2664INTERCHANGEABLE
PLATE,WALL,ELECTRICAL
HBL5222
5330-00-765-2915INTERCHANGEABLE
GASKET
G8-055041
4730-00-849-0552INTERCHANGEABLE
STRAINER ELEMENT,SEDIMENT
4130-01-018-8225INTERCHANGEABLE
BOOT,AIR CONDITIONING
714975-1
2530-01-123-8790INTERCHANGEABLE
CALIPER,DISC BRAKE
4271395
5120-01-399-9540INTERCHANGEABLE
SOCKET,SOCKET WRENCH
3820-01-537-2492INTERCHANGEABLE
DRILL ROD,ROCK DRILL
5222
6625-01-571-6897INTERCHANGEABLE
MONITOR,WAVEFORM
5222

Frequently Asked Questions

What is NSN 6540-01-158-3606?

NSN 6540-01-158-3606 is a Front,spectacle, manufactured by Square D Co Monroe Plant, classified under FSC 6540 (No Item Name Available). Status: active.

What are the part numbers for NSN 6540-01-158-3606?

NSN 6540-01-158-3606 has 1 cross-referenced part number: 52-22 (Square D Co Monroe Plant).

What NSN replaces 6540-01-158-3606?

There are 12 known substitutes for 6540-01-158-3606: 5340-00-163-2639, 3110-00-156-5396, 3110-00-156-7997 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 52-22?

Key specifications for 52-22: Eye Wire Maximum Horizontal Inside Diameter: 52.0 MILLIMETERS MM; Part Name Assigned by Controlling Agency: FRONT SPECTACLE FEMALE STYLE CELLULOSE ACET BROWN 52EYE 22BRIDGE; End Piece Type: DOUBLE SCREW; Color: BROWN. 7 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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