FSC Application Data: ACFT GUNNERY FIRE CONTROL COMPONENT
Identification
NSN: 1270-00-021-5638
NIIN: 000215638
FSC: 1270 — Aircraft Gunnery Fire Control Components
FSG: 12 — Fire Control Equipment
General Description
The Optical Sight Unit, cataloged under National Stock Number 1270-00-021-5638, is classified within Federal Supply Class 1270 (Aircraft Gunnery Fire Control Components) of the Fire Control Equipment group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
1270-00-021-5638
Item Name
Optical Sight Unit
FSC / FSG
1270 / 12 — Aircraft Gunnery Fire Control Components
Status
ACTIVE
FSC Application Data
ACFT GUNNERY FIRE CONTROL COMPONENT
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL D — Destroy Item
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
1650-01-237-4425622308POSSIBLE MATCH
SHAFT,BLOCK AND PISTON ASSEMBLY
Possible match (shared part number)Eaton Aerospace, Llc Dba Jackson South
5315-01-375-22206-2-2308-20-94POSSIBLE MATCH
PIN,STRAIGHT,HEADED
Possible match (shared part number)W1d1 Natick Soldier Center Dba Us Army Ccdc Soldier Center Div Combat Capabilities Development Command - Soldier Center
3510-01-467-92246-2-2308POSSIBLE MATCH
SPOUT,DISCHARGE
Possible match (shared part number)W1d1 Natick Soldier Center Dba Us Army Ccdc Soldier Center Div Combat Capabilities Development Command - Soldier Center
5315-01-468-71616-2-2308-20-95POSSIBLE MATCH
PIN,STRAIGHT,HEADED
Possible match (shared part number)W1d1 Natick Soldier Center Dba Us Army Ccdc Soldier Center Div Combat Capabilities Development Command - Soldier Center
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
622308
5/9Secondary reference
Raytheon Technical Services Company
231E778G1
3/2Design control — primary reference
U.S. Government activity
622308
7/2Vendor item drawing reference
Cae Usa Inc.
Related Parts
1650-01-237-4425POSSIBLE MATCH
SHAFT,BLOCK AND PISTON ASSEMBLY
622308
5315-01-375-2220POSSIBLE MATCH
PIN,STRAIGHT,HEADED
6-2-2308-20-94
3510-01-467-9224POSSIBLE MATCH
SPOUT,DISCHARGE
6-2-2308
5315-01-468-7161POSSIBLE MATCH
PIN,STRAIGHT,HEADED
6-2-2308-20-95
Frequently Asked Questions
What is NSN 1270-00-021-5638?
NSN 1270-00-021-5638 is a Optical Sight Unit, classified under FSC 1270, Aircraft Gunnery Fire Control Components. Status: active.
What NSN replaces 1270-00-021-5638?
4 possible matches (shared part number, not a government interchangeability claim): 1650-01-237-4425, 5315-01-375-2220, 3510-01-467-9224. Verify interchangeability with system specifications before substitution.
What are the specifications of 1270-00-021-5638?
Key specifications for 1270-00-021-5638: FSC Application Data: ACFT GUNNERY FIRE CONTROL COMPONENT; End Item Identification: A/F 37U-T9. 1 specification is documented in the U.S. Government catalog.
Is NSN 1270-00-021-5638 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 1270-00-021-5638?
NSN 1270-00-021-5638 has DEMIL Code D. 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.