PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-R-81729Belt,aircraft Safety

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 1680-00-408-9781 · FSC 1680 · No Item Name Available
Verified by PartsTable
NSN 1680-00-408-9781 — this item is cataloged by the U.S. Government under National Stock Number 1680-00-408-9781. Primary manufacturer part number: MIL-R-81729.
Features
  • Belt,aircraft Safety — FSC 1680
  • Adjustability: ADJUSTABLE
  • Personnel Capacity: 1
  • Webbing Width: 3.000 INCHES NOMINAL IN
  • Adjustment Maximum Length: 46.000 INCHES IN
  • Fastener Material and Location: STEEL BUCKLE
  • 2 verified cross-references
  • Primary manufacturer: Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Belt,aircraft Safety, cataloged under National Stock Number 1680-00-408-9781, is classified within Federal Supply Class 1680 (No Item Name Available) of the Aircraft Components and Accessories 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 5 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. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN1680-00-408-9781
Primary Part NumberMIL-R-81729
Item NameBelt,aircraft Safety
FSC / FSG1680 / 16 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusCANCELLED
AdjustabilityADJUSTABLE
Personnel Capacity1
Webbing Width3.000 INCHES NOMINAL IN
Adjustment Maximum Length46.000 INCHES IN
Fastener Material and LocationSTEEL BUCKLE
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 5
1680-00-407-5335 INTERCHANGEABLE
Belt,aircraft Safety
1680-00-516-6550 INTERCHANGEABLE
Belt,aircraft Safety
1680-00-516-800062A126D1-1 INTERCHANGEABLE
Harness,aircraft Safety,shoulder
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
1680-01-098-5744 INTERCHANGEABLE
Belt,aircraft Safety
1680-01-133-9975 INTERCHANGEABLE
Belt,aircraft Safety
Cross-Reference Index
Part NumberManufacturer
MIL-R-81729 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MS22033-6 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
1680-00-407-5335INTERCHANGEABLE
BELT,AIRCRAFT SAFETY
1680-00-516-6550INTERCHANGEABLE
BELT,AIRCRAFT SAFETY
1680-00-516-8000INTERCHANGEABLE
HARNESS,AIRCRAFT SAFETY,SHOULDER
62A126D1-1
1680-01-098-5744INTERCHANGEABLE
BELT,AIRCRAFT SAFETY
1680-01-133-9975INTERCHANGEABLE
BELT,AIRCRAFT SAFETY

Frequently Asked Questions

What is NSN 1680-00-408-9781?

NSN 1680-00-408-9781 is a Belt,aircraft Safety, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 1680 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 1680-00-408-9781?

NSN 1680-00-408-9781 has 2 cross-referenced part numbers: MIL-R-81729 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MS22033-6 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 1680-00-408-9781?

There are 5 known substitutes for 1680-00-408-9781: 1680-00-407-5335, 1680-00-516-6550, 1680-00-516-8000 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-R-81729?

Key specifications for MIL-R-81729: Adjustability: ADJUSTABLE; Personnel Capacity: 1; Webbing Width: 3.000 INCHES NOMINAL IN; Adjustment Maximum Length: 46.000 INCHES IN. 5 total characteristics are documented in the Federal Logistics Information System.

Is NSN 1680-00-408-9781 still in active supply?

NSN 1680-00-408-9781 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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