FSC: 1270 — Aircraft Gunnery Fire Control Components
FSG: 12 — Fire Control Equipment
General Description
The Gear Assy,spur,gear, cataloged under National Stock Number 1270-00-316-5658, is classified within Federal Supply Class 1270 (Aircraft Gunnery Fire Control Components) of the Fire Control Equipment group. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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.
Catalog Facts
Item Name
Gear Assy,spur,gear
FSC / FSG
1270 — Aircraft Gunnery Fire Control Components (FSG 12)
Technical Specifications
Parameter
Value
NSN
1270-00-316-5658
Item Name
Gear Assy,spur,gear
FSC / FSG
1270 / 12 — Aircraft Gunnery Fire Control Components
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL C — Remove/Demil Key Points
Hazard
No hazard code in the DLA record (HMIC N)
⇄Related Items4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4320-00-555-923839970POSSIBLE MATCH
PUMP,AXIAL PISTONS
Possible match (shared part number)Eaton Aerospace, Llc Dba Jackson South
2520-01-250-5540402541POSSIBLE MATCH
CLUTCH,POSITIVE,VEHICULAR
Possible match (shared part number)Austin-Westran Llc
5305-01-389-7210074065-001POSSIBLE MATCH
SCREW,CAP,HEXAGON HEAD
Possible match (shared part number)Ameridrives International Llc Dba Ameridrives International Llc
5305-01-650-3931402541POSSIBLE MATCH
SCREW,MACHINE
Possible match (shared part number)General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
402541
3/2Design control — primary reference
U.S. Government activity
Related Parts
4320-00-555-9238POSSIBLE MATCH
PUMP,AXIAL PISTONS
39970
2520-01-250-5540POSSIBLE MATCH
CLUTCH,POSITIVE,VEHICULAR
402541
5305-01-389-7210POSSIBLE MATCH
SCREW,CAP,HEXAGON HEAD
074065-001
5305-01-650-3931POSSIBLE MATCH
SCREW,MACHINE
402541
Frequently Asked Questions
What is NSN 1270-00-316-5658?
NSN 1270-00-316-5658 is a Gear Assy,spur,gear, classified under FSC 1270, Aircraft Gunnery Fire Control Components. Status: active.
What NSN replaces 1270-00-316-5658?
4 possible matches (shared part number, not a government interchangeability claim): 4320-00-555-9238, 2520-01-250-5540, 5305-01-389-7210. Verify interchangeability with system specifications before substitution.
Is NSN 1270-00-316-5658 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 1270-00-316-5658?
NSN 1270-00-316-5658 has DEMIL Code C. 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.