PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

56M023P1Reflector,indicating,clearance

Mack Trucks Inc Parts Opn · NSN 9905-00-202-3639 · FSC 9905 · No Item Name Available
Verified by PartsTable
NSN 9905-00-202-3639 — this item is cataloged by the U.S. Government under National Stock Number 9905-00-202-3639. Primary manufacturer part number: 56M023P1.
Features
  • Reflector,indicating,clearance — FSC 9905
  • Lens Effective Diameter: 3.015 INCHES IN
  • Mounting Hole Diameter: 0.281 INCHES NOMINAL IN
  • Mounting Type: FLUSH
  • Overall Thickness: 0.625 INCHES NOMINAL IN
  • Lens Color: AMBER
  • Material: PLASTIC LENS
  • Lens Effective Diameter: 3.015 INCHES IN
Applications
  • Applications requiring Plastic Lens construction
General Description

The Reflector,indicating,clearance, cataloged under National Stock Number 9905-00-202-3639, is classified within Federal Supply Class 9905 (No Item Name Available) of the Miscellaneous group. The primary manufacturer of record is Mack Trucks Inc Parts Opn. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 50 commercial cross-references from 36 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN9905-00-202-3639
Primary Part Number56M023P1
Item NameReflector,indicating,clearance
FSC / FSG9905 / 99 — No Item Name Available
ManufacturerMack Trucks Inc Parts Opn
StatusCANCELLED
Lens Effective Diameter3.015 INCHES IN
Mounting Hole Diameter0.281 INCHES NOMINAL IN
Mounting TypeFLUSH
Overall Thickness0.625 INCHES NOMINAL IN
Lens ColorAMBER
MaterialPLASTIC LENS
Lens Effective Diameter3.015 INCHES IN
Lens TypeREFLEX
Lens ShapeROUND
Hole Spacing DimensionSPACED 180 DEG APART ON 3.937 IN. BOLT CIRCLE OF HOLES IN
Hole Spacing DimensionSPACED 180 DEG APART ON 3.937 IN. BOLT CIRCLE OF HOLES IN
Mounting Hole Quantity2
Lens ColorAMBER
MaterialPLASTIC LENS
Mounting Hole Quantity2
Lens TypeREFLEX
Overall Thickness0.625 INCHES NOMINAL IN
Mounting Hole Diameter0.281 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5930-00-004-3905 INTERCHANGEABLE
Switch,push-Pull
5910-00-076-010616252 INTERCHANGEABLE
Capacitor Assembly
Drs Advanced Isr, Llc
1660-00-083-423316252 INTERCHANGEABLE
Parts Kit,regulator
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
6625-00-089-4227 INTERCHANGEABLE
Analyzer,spectrum
5330-00-104-0004 INTERCHANGEABLE
Seal,plain Encased
3110-00-117-0774MS17169-15 INTERCHANGEABLE
Bearing,roller,thrust
American Society for Testing and Materials Dba Astm International
5310-00-148-880925412 INTERCHANGEABLE
Nut,plain,hexagon
John Deer Consumer Products Inc
3110-00-156-5355177009-34 INTERCHANGEABLE
Bearing,ball,annular
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5940-00-156-7430115691-004 INTERCHANGEABLE
Terminal,lug
Bae Systems Information and Electronic Systems Integration Inc. Dba Bae Systems
6145-00-163-7493293-3922 INTERCHANGEABLE
Cable,radio Frequency
Te Connectivity Corporation Dba Microdot Products
Cross-Reference Index
Part NumberManufacturer
MS35387-2 Tiffin Metal Products Co. (USA)
506102 Army Weapons Command Attn Amswe-Ree-S (USA)
40618A General Motors Corp (USA)
56M023P1 PRIMARY Mack Trucks Inc Parts Opn (USA)
D7740-3-3 PRIMARY Chief of Engineers Dept of Army (USA)
122921HA PRIMARY Navistar Intl Corp Melrose Park Engine Plant Location /melrose Park/ (USA)
16T1872 PRIMARY Chief of Engineers Dept of Army (USA)
333A Concord Instruments Corp (USA)
06838 PRIMARY Parker Hannifin Corporation Div Cylinder Division (USA)
MILR12144 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
333AMBER Concord Instruments Corp (USA)
2F2656 PRIMARY Caterpillar Inc Div Caterpillar Defense (USA)
T11A PRIMARY Bay City Shovels, Inc (USA)
899212 General Motors Corp (USA)
333-8-1-303 Concord Instruments Corp (USA)
7348221 PRIMARY U S Army Tank Automotive Command Amsta-Im-Mm (USA)
29-31-27 PRIMARY Trailmobile Inc Sub of the Pullman Co (USA)
911-3A Aqua-Chem Inc Cleaver-Brooks Div (USA)
US233 Rivinius Inc Littleford Machinery Div (USA)
8011716-30 PRIMARY Garwood/feller Inc Garwood Winch Div (USA)
Related Parts
5930-00-004-3905INTERCHANGEABLE
SWITCH,PUSH-PULL
5910-00-076-0106INTERCHANGEABLE
CAPACITOR ASSEMBLY
16252
1660-00-083-4233INTERCHANGEABLE
PARTS KIT,REGULATOR
16252
6625-00-089-4227INTERCHANGEABLE
ANALYZER,SPECTRUM
5330-00-104-0004INTERCHANGEABLE
SEAL,PLAIN ENCASED
3110-00-117-0774INTERCHANGEABLE
BEARING,ROLLER,THRUST
MS17169-15
5310-00-148-8809INTERCHANGEABLE
NUT,PLAIN,HEXAGON
25412
3110-00-156-5355INTERCHANGEABLE
BEARING,BALL,ANNULAR
177009-34
5940-00-156-7430INTERCHANGEABLE
TERMINAL,LUG
115691-004
6145-00-163-7493INTERCHANGEABLE
CABLE,RADIO FREQUENCY
293-3922
1650-00-166-0437INTERCHANGEABLE
CAP,VALVE
25412
5325-00-200-5358INTERCHANGEABLE
RING,RETAINING
320602

Frequently Asked Questions

What is NSN 9905-00-202-3639?

NSN 9905-00-202-3639 is a Reflector,indicating,clearance, manufactured by Mack Trucks Inc Parts Opn, classified under FSC 9905 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 9905-00-202-3639?

NSN 9905-00-202-3639 has 50 cross-referenced part numbers: MS35387-2 (Tiffin Metal Products Co.), 506102 (Army Weapons Command Attn Amswe-Ree-S), 40618A (General Motors Corp), 56M023P1 (Mack Trucks Inc Parts Opn), D7740-3-3 (Chief of Engineers Dept of Army) and 45 more.

What NSN replaces 9905-00-202-3639?

There are 12 known substitutes for 9905-00-202-3639: 5930-00-004-3905, 5910-00-076-0106, 1660-00-083-4233 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 56M023P1?

Key specifications for 56M023P1: Lens Effective Diameter: 3.015 INCHES IN; Mounting Hole Diameter: 0.281 INCHES NOMINAL IN; Mounting Type: FLUSH; Overall Width: 3.625 INCHES NOMINAL IN. 22 total characteristics are documented in the Federal Logistics Information System.

Is NSN 9905-00-202-3639 still in active supply?

NSN 9905-00-202-3639 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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