General Characteristics Item Description: 7.000 IN. BORE SIZE;CONSISTS OF 2 BACKUP WASHERFOR @CYLINDER BODY O-RING;2CYLINDER BODY TO HEAD AND CAP SEAL O-RING;2 BACKUP WASHER,PISTON;2 LIPSEAL,PISTON IN
Identification
NSN: 3040-00-421-9525
NIIN: 004219525
FSC: 3040 — Miscellaneous Power Transmission Equipment
FSG: 30 — Mechanical Power Transmission Equipment
General Description
The Parts Kit,piston, cataloged under National Stock Number 3040-00-421-9525, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
3040-00-421-9525
Item Name
Parts Kit,piston
FSC / FSG
3040 / 30 — Miscellaneous Power Transmission Equipment
Status
ACTIVE
General Characteristics Item Description
7.000 IN. BORE SIZE;CONSISTS OF 2 BACKUP WASHERFOR @CYLINDER BODY O-RING;2CYLINDER BODY TO HEAD AND CAP SEAL O-RING;2 BACKUP WASHER,PISTON;2 LIPSEAL,PISTON IN
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
PK702HLL05
3/2Design control — primary reference
U.S. Government activity
No interchangeability data on file.
Other items in FSC 3040 — Miscellaneous Power Transmission Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3040-00-001-0046
3040-00-001-0046 · Item name not on file
3040-00-001-0047
3040-00-001-0047 · Item name not on file
3040-00-001-0048
3040-00-001-0048 · Item name not on file
3040-00-001-0068
3040-00-001-0068 · Item name not on file
3040-00-001-0077
3040-00-001-0077 · Item name not on file
3040-00-001-0078
3040-00-001-0078 · Item name not on file
3040-00-001-0089
3040-00-001-0089 · Item name not on file
3040-00-001-1224
3040-00-001-1224 · Item name not on file
Frequently Asked Questions
What is NSN 3040-00-421-9525?
NSN 3040-00-421-9525 is a Parts Kit,piston, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
What are the specifications of 3040-00-421-9525?
Key specifications for 3040-00-421-9525: General Characteristics Item Description: 7.000 IN. BORE SIZE;CONSISTS OF 2 BACKUP WASHERFOR @CYLINDER BODY O-RING;2CYLINDER BODY TO HEAD AND CAP SEAL O-RING;2 BACKUP WASHER,PISTON;2 LIPSEAL,PISTON IN. 1 specification is documented in the U.S. Government catalog.
Is NSN 3040-00-421-9525 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.
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.