FSG: 42 — Fire Fighting, Rescue, and Safety Equipment
General Description
The Kit,inlet Valve Repair, cataloged under National Stock Number 4240-01-221-0391, is classified within Federal Supply Class 4240 (Safety and Rescue Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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
4240-01-221-0391
Item Name
Kit,inlet Valve Repair
FSC / FSG
4240 / 42 — Safety and Rescue Equipment
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
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
5-1-1758
3/2Design control — primary reference
U.S. Government activity
No interchangeability data on file.
Other items in FSC 4240 — Safety and Rescue Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4240-00-001-1515
4240-00-001-1515 · Item name not on file
4240-00-001-2684
4240-00-001-2684 · Item name not on file
4240-00-006-0022
HOSE,EVACUATION
4240-00-007-4576
4240-00-007-4576 · Item name not on file
4240-00-007-8182
4240-00-007-8182 · Item name not on file
4240-00-007-8183
4240-00-007-8183 · Item name not on file
4240-00-007-8184
4240-00-007-8184 · Item name not on file
4240-00-007-8185
4240-00-007-8185 · Item name not on file
Frequently Asked Questions
What is NSN 4240-01-221-0391?
NSN 4240-01-221-0391 is a Kit,inlet Valve Repair, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
What are the specifications of 4240-01-221-0391?
Key specifications for 4240-01-221-0391: Special Features: POLYTETRAFLUOROETHYLENE WASHER,PN 5-1-1377; CUP SEAL,PN 5-1-1353; O-RINGS,PNS 5-1-131,9-1 AND -2; E-RING,PN MS16633-4017;INLET VALVE DISK,PN 5-1-1366; CHECK VALVE,PN 5-1-1403;WASHER,THRUST,PN 5-1-1451; RETAINING RINGS,PNS MS16624-4025 AND -4037.. 0 specifications are documented in the U.S. Government catalog.
Is NSN 4240-01-221-0391 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.