PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-B-13656BBinocular

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 6650-00-734-3985 · FSC 6650 · No Item Name Available
Verified by PartsTable
NSN 6650-00-734-3985 — this item is cataloged by the U.S. Government under National Stock Number 6650-00-734-3985. Primary manufacturer part number: MIL-B-13656B.
Features
  • Binocular — FSC 6650
  • Field View Coverage: 7 DEG 16 MIN TRUE
  • Eyepiece Focusing Type: INDIVIDUAL
  • Carrying Case: PROVIDED
  • Nondefinitive Spec/std Data: -17A1 TYPE
  • Objective Aperture Diameter: 50.0 MILLIMETERS NOMINAL MM
  • Reticle Identifying Number: FSN6650-530-0974 AND DWG. NO. 6702518
  • Accessory Components and Quantity: NECK STRAP 1;SHOULDER STRAP 1
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Binocular, cataloged under National Stock Number 6650-00-734-3985, is classified within Federal Supply Class 6650 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 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
NSN6650-00-734-3985
Primary Part NumberMIL-B-13656B
Item NameBinocular
FSC / FSG6650 / 66 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Field View Coverage7 DEG 16 MIN TRUE
Eyepiece Focusing TypeINDIVIDUAL
Carrying CasePROVIDED
Nondefinitive Spec/std Data-17A1 TYPE
Objective Aperture Diameter50.0 MILLIMETERS NOMINAL MM
Reticle Identifying NumberFSN6650-530-0974 AND DWG. NO. 6702518
Accessory Components and QuantityNECK STRAP 1;SHOULDER STRAP 1
Optical Device TypePRISM
Reticle LocationRIGHT EYEPIECE
FSC Application DataBINOCULAR,EXCEPT FIRE CONTROL
Interpupillary Adjustment FeaturePROVIDED
Magnification7X NOMINAL
Diopter ScaleINCLUDED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5310-00-009-3838400122 INTERCHANGEABLE
Nut,duct Coupling
Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution
4140-00-944-7318020297 INTERCHANGEABLE
Fan,vaneaxial
Rotron Incorporated
5905-01-276-550540-0122 INTERCHANGEABLE
Resistor,fixed,film
Gas Tech, Inc
6750-01-427-4083 INTERCHANGEABLE
Film,photographic
5995-01-447-3276400-122 INTERCHANGEABLE
Cable Assembly,special Purpose,e
Ge Intelligent Embedded Systems Inc
5930-01-652-7184400-122 INTERCHANGEABLE
Guard,switch
Msp Aviation, Inc. Dba Msp Maufacturing
5930-01-671-0521400122 INTERCHANGEABLE
Switch,toggle
Stinar, Llc
5995-01-685-4488 INTERCHANGEABLE
Cable Assembly,special Purpose,e
5930-01-687-6550 INTERCHANGEABLE
Guard,switch
Cross-Reference Index
Part NumberManufacturer
MIL-B-13656B Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
400122 Hubbell Harvey Inc Kellems Div (USA)
Related Parts
5310-00-009-3838INTERCHANGEABLE
NUT,DUCT COUPLING
400122
4140-00-944-7318INTERCHANGEABLE
FAN,VANEAXIAL
020297
5905-01-276-5505INTERCHANGEABLE
RESISTOR,FIXED,FILM
40-0122
6750-01-427-4083INTERCHANGEABLE
FILM,PHOTOGRAPHIC
5995-01-447-3276INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
400-122
5930-01-652-7184INTERCHANGEABLE
GUARD,SWITCH
400-122
5930-01-671-0521INTERCHANGEABLE
SWITCH,TOGGLE
400122
5995-01-685-4488INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
5930-01-687-6550INTERCHANGEABLE
GUARD,SWITCH

Frequently Asked Questions

What is NSN 6650-00-734-3985?

NSN 6650-00-734-3985 is a Binocular, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 6650 (No Item Name Available). Status: active.

What are the part numbers for NSN 6650-00-734-3985?

NSN 6650-00-734-3985 has 2 cross-referenced part numbers: MIL-B-13656B (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 400122 (Hubbell Harvey Inc Kellems Div).

What NSN replaces 6650-00-734-3985?

There are 9 known substitutes for 6650-00-734-3985: 5310-00-009-3838, 4140-00-944-7318, 5905-01-276-5505 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-B-13656B?

Key specifications for MIL-B-13656B: Special Features: W/FILLER; Field View Coverage: 7 DEG 16 MIN TRUE; Eyepiece Focusing Type: INDIVIDUAL; Carrying Case: PROVIDED. 14 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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