PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5187-3Back Assembly,seat

Lockheed Martin Corp · NSN 1680-00-858-0431 · FSC 1680 · No Item Name Available
Verified by PartsTable
NSN 1680-00-858-0431 — this item is cataloged by the U.S. Government under National Stock Number 1680-00-858-0431. Primary manufacturer part number: 5187-3.
Features
  • Back Assembly,seat — FSC 1680
  • 4 verified cross-references
  • Primary manufacturer: Lockheed Martin Corp
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Back Assembly,seat, cataloged under National Stock Number 1680-00-858-0431, is classified within Federal Supply Class 1680 (No Item Name Available) of the Aircraft Components and Accessories group. The primary manufacturer of record is Lockheed Martin Corp. This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameBack Assembly,seat
FSC / FSG1680 — No Item Name Available (FSG 16)
ManufacturersThe Conrad Company Dba Conrad Co (CAGE 22539); Lockheed Martin Corp (CAGE 98897); Hyland Industries Inc (CAGE 0TGT9)
Technical Specifications
ParameterValue
NSN1680-00-858-0431
Primary Part Number5187-3
Item NameBack Assembly,seat
FSC / FSG1680 / 16 — No Item Name Available
ManufacturerLockheed Martin Corp
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
1610-00-119-716151873 INTERCHANGEABLE
Plate
Hamilton Sundstrand Corporation Dba Collins Aerospace
4730-00-328-53155187-3 INTERCHANGEABLE
Coupling Half,quick Disconnect
Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupler Division
5360-00-598-4991SCB69326-26 INTERCHANGEABLE
Spring,helical,extension
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
1420-00-621-7708 INTERCHANGEABLE
Block,heater
1680-00-858-45054858 INTERCHANGEABLE
Head Rest,seat
Lockheed Martin Corp
3815-01-503-114651873 INTERCHANGEABLE
Fastline,sheave Case Kit
Allied Systems Company Dba Allied Systems Co
6532-01-588-867851873 INTERCHANGEABLE
Shoe,vinyl Cast
Bsn Medical Inc
4730-01-640-670051873 INTERCHANGEABLE
Plug,pipe
Lowes Companies Inc Dba Lowes Div Lowes of Madison
5325-01-734-115151873 INTERCHANGEABLE
Ring,retaining
Vigor Works Llc
Cross-Reference Index
Part NumberManufacturer
5187-3 The Conrad Company Dba Conrad Co (USA)
5187-3 PRIMARY Lockheed Martin Corp (USA)
7-79288-3 The Conrad Company Dba Conrad Co (USA)
7-79288-3 Hyland Industries Inc (USA)
Related Parts
1610-00-119-7161INTERCHANGEABLE
PLATE
51873
4730-00-328-5315INTERCHANGEABLE
COUPLING HALF,QUICK DISCONNECT
5187-3
5360-00-598-4991INTERCHANGEABLE
SPRING,HELICAL,EXTENSION
SCB69326-26
1420-00-621-7708INTERCHANGEABLE
BLOCK,HEATER
1680-00-858-4505INTERCHANGEABLE
HEAD REST,SEAT
4858
3815-01-503-1146INTERCHANGEABLE
FASTLINE,SHEAVE CASE KIT
51873
6532-01-588-8678INTERCHANGEABLE
SHOE,VINYL CAST
51873
4730-01-640-6700INTERCHANGEABLE
PLUG,PIPE
51873
5325-01-734-1151INTERCHANGEABLE
RING,RETAINING
51873

Frequently Asked Questions

What is NSN 1680-00-858-0431?

NSN 1680-00-858-0431 is a Back Assembly,seat, manufactured by Lockheed Martin Corp, classified under FSC 1680 (No Item Name Available). Status: active.

What are the part numbers for NSN 1680-00-858-0431?

NSN 1680-00-858-0431 has 4 cross-referenced part numbers: 5187-3 (The Conrad Company Dba Conrad Co), 5187-3 (Lockheed Martin Corp), 7-79288-3 (The Conrad Company Dba Conrad Co), 7-79288-3 (Hyland Industries Inc).

What NSN replaces 1680-00-858-0431?

There are 9 known substitutes for 1680-00-858-0431: 1610-00-119-7161, 4730-00-328-5315, 5360-00-598-4991 and 6 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com