PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4251-1Seat,aircraft

Hardman Aircraft Inc · NSN 1680-00-986-3489 · FSC 1680 · No Item Name Available
Verified by PartsTable
NSN 1680-00-986-3489 — this item is cataloged by the U.S. Government under National Stock Number 1680-00-986-3489. Primary manufacturer part number: 4251-1.
Features
  • Seat,aircraft — FSC 1680
  • Seating Capacity: 1
  • Mounting Type: TRACK
  • 3 verified cross-references
  • Primary manufacturer: Hardman Aircraft Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Seat,aircraft, cataloged under National Stock Number 1680-00-986-3489, is classified within Federal Supply Class 1680 (No Item Name Available) of the Aircraft Components and Accessories group. The primary manufacturer of record is Hardman Aircraft Inc. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN1680-00-986-3489
Primary Part Number4251-1
Item NameSeat,aircraft
FSC / FSG1680 / 16 — No Item Name Available
ManufacturerHardman Aircraft Inc
StatusACTIVE
Seating Capacity1
Mounting TypeTRACK
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5310-00-167-5224 INTERCHANGEABLE
Nut,self-Locking,assembled Washe
5950-00-532-3247SM-C-2001898 INTERCHANGEABLE
Transformer,power
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5999-00-878-6659SM-A-544894 INTERCHANGEABLE
Shielding Gasket,electronic
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
6680-01-208-564342511 INTERCHANGEABLE
Transmitter,liquid Quantity
Setra Systems, Inc. Dba Gems Sensors
5950-01-279-809361709-205 INTERCHANGEABLE
Transformer,audio Frequency
Dynalec Corporation
5310-01-308-458842511 INTERCHANGEABLE
Nut,plate
Mirion Technologies (canberra), Inc.
3040-01-377-7071010-9039-H ITEM 28 INTERCHANGEABLE
Connecting Link,rigid
Tyco Fire Products Lp
1730-01-444-3876 INTERCHANGEABLE
Bottom Fork
Cross-Reference Index
Part NumberManufacturer
4251-1 Hardman Aircraft Inc (USA)
4251-1 B/e Aerospace Inc Dba Interturbine (USA)
651377-7 Lockheed Martin Corp (USA)
Related Parts
5310-00-167-5224INTERCHANGEABLE
NUT,SELF-LOCKING,ASSEMBLED WASHE
5950-00-532-3247INTERCHANGEABLE
TRANSFORMER,POWER
SM-C-2001898
5999-00-878-6659INTERCHANGEABLE
SHIELDING GASKET,ELECTRONIC
SM-A-544894
6680-01-208-5643INTERCHANGEABLE
TRANSMITTER,LIQUID QUANTITY
42511
5950-01-279-8093INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
61709-205
5310-01-308-4588INTERCHANGEABLE
NUT,PLATE
42511
3040-01-377-7071INTERCHANGEABLE
CONNECTING LINK,RIGID
010-9039-H ITEM 28
1730-01-444-3876INTERCHANGEABLE
BOTTOM FORK

Frequently Asked Questions

What is NSN 1680-00-986-3489?

NSN 1680-00-986-3489 is a Seat,aircraft, manufactured by Hardman Aircraft Inc, classified under FSC 1680 (No Item Name Available). Status: active.

What are the part numbers for NSN 1680-00-986-3489?

NSN 1680-00-986-3489 has 3 cross-referenced part numbers: 4251-1 (Hardman Aircraft Inc), 4251-1 (B/e Aerospace Inc Dba Interturbine), 651377-7 (Lockheed Martin Corp).

What NSN replaces 1680-00-986-3489?

There are 8 known substitutes for 1680-00-986-3489: 5310-00-167-5224, 5950-00-532-3247, 5999-00-878-6659 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4251-1?

Key specifications for 4251-1: Seating Capacity: 1; Mounting Type: TRACK. 2 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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