NSN 1680-01-055-4130 — this item is cataloged by the U.S. Government under National Stock Number 1680-01-055-4130. Manufacturer of record part number: B2731-1B.
Also searched as1680-01-055-4130 ·
1680010554130 ·
NIIN 010554130 ·
01-055-4130 ·
FSC 1680 Miscellaneous Aircraft Accessories and Components · CAGE 54184 · B2731-1B
General Characteristics Item Description: STEEL ESR ARMOR 4340; 6.540 IN. LG,1.000 IN. W,0.375 IN. THK IN
1 manufacturer part number on file
Manufacturer of record: Ara, Inc
Identification
NSN: 1680-01-055-4130
NIIN: 010554130
FSC: 1680 — Miscellaneous Aircraft Accessories and Components
FSG: 16 — Aircraft Components and Accessories
Primary part number: B2731-1B
Manufacturer: Ara, Inc
General Description
The Block,support,seat, cataloged under National Stock Number 1680-01-055-4130, is classified within Federal Supply Class 1680 (Miscellaneous Aircraft Accessories and Components) of the Aircraft Components and Accessories group. The manufacturer of record is Ara, Inc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
1680-01-055-4130
Primary Part Number
B2731-1B
Item Name
Block,support,seat
FSC / FSG
1680 / 16 — Miscellaneous Aircraft Accessories and Components
Manufacturer
Ara, Inc
Status
ACTIVE
General Characteristics Item Description
STEEL ESR ARMOR 4340; 6.540 IN. LG,1.000 IN. W,0.375 IN. THK IN
Other items in FSC 1680 — Miscellaneous Aircraft Accessories and Components
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
1680-00-001-1736
DUCT ASSEMBLY,BRANCHED
1680-00-003-3721
1680-00-003-3721 · Item name not on file
1680-00-009-3782
PISTON,EJECTOR,INNER
1680-00-009-6180
1680-00-009-6180 · Item name not on file
1680-00-475-0002
TIP,RUBBER CONTROL
1680-00-696-6170
ADAPTER,SCREW END A
1680-00-867-7158
COVER,GEARCASE
1680-00-885-0923
KNOB ASSY,LANDING G
Frequently Asked Questions
What is NSN 1680-01-055-4130?
NSN 1680-01-055-4130 is a Block,support,seat, manufactured by Ara, Inc, classified under FSC 1680, Miscellaneous Aircraft Accessories and Components. Status: active.
What part numbers are listed for NSN 1680-01-055-4130?
NSN 1680-01-055-4130 has 1 manufacturer part number on file: B2731-1B (Ara, Inc).
What are the specifications of B2731-1B?
Key specifications for B2731-1B: General Characteristics Item Description: STEEL ESR ARMOR 4340; 6.540 IN. LG,1.000 IN. W,0.375 IN. THK IN; End Item Identification: MODEL CH-46E AIRCRAFT. 1 specification is documented in the U.S. Government catalog.
Is NSN 1680-01-055-4130 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
What is the DEMIL code for NSN 1680-01-055-4130?
NSN 1680-01-055-4130 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.