NSN 5975-01-644-3987 · NIIN 016443987 · Part number 3991AS256-1
Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier · FSC 5975 — Electrical Hardware and Supplies · FSG 59 — Electrical and Electronic Equipment Components · CAGE 30003
Government record, cited
NSN 5975-01-644-3987 — this item is cataloged by the U.S. Government under National Stock Number 5975-01-644-3987. Manufacturer of record part number: 3991AS256-1.
Also searched as5975-01-644-3987 ·
5975016443987 ·
NIIN 016443987 ·
01-644-3987 ·
FSC 5975 Electrical Hardware and Supplies · CAGE 30003 · 3991AS256-1 · F80030F
Manufacturer of record: Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
Identification
NSN: 5975-01-644-3987
NIIN: 016443987
FSC: 5975 — Electrical Hardware and Supplies
FSG: 59 — Electrical and Electronic Equipment Components
Primary part number: 3991AS256-1
Manufacturer: Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
General Description
The Rack,electrical Equipment, cataloged under National Stock Number 5975-01-644-3987, is classified within Federal Supply Class 5975 (Electrical Hardware and Supplies) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 10 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Catalog Facts
Item Name
Rack,electrical Equipment
FSC / FSG
5975 — Electrical Hardware and Supplies (FSG 59)
Manufacturers
Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (CAGE 30003)
Technical Specifications
Parameter
Value
NSN
5975-01-644-3987
Primary Part Number
3991AS256-1
Item Name
Rack,electrical Equipment
FSC / FSG
5975 / 59 — Electrical Hardware and Supplies
Manufacturer
Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
Possible hazard — SDS may be required (DLA HMIC P)
Criticality Code
X
⇄Related Items10
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
NSN 5975-01-644-3987 is a Rack,electrical Equipment, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 5975, Electrical Hardware and Supplies. Status: active.
What part numbers are listed for NSN 5975-01-644-3987?
NSN 5975-01-644-3987 has 1 manufacturer part number on file: 3991AS256-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
What NSN replaces 5975-01-644-3987?
10 possible matches (shared part number, not a government interchangeability claim): 3950-01-644-4482, 3010-01-644-4541, 3010-01-644-4546. Verify interchangeability with system specifications before substitution.
Is NSN 5975-01-644-3987 hazardous material?
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
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.