The Paper,filter, cataloged under National Stock Number 6640-01-581-0004, is classified within Federal Supply Class 6640 (Laboratory Equipment and Supplies) of the Instruments and Laboratory 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1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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
6640-01-581-0004
Item Name
Paper,filter
FSC / FSG
6640 / 66 — Laboratory Equipment and Supplies
Status
ACTIVE
Diameter
24.000 CENTIMETERS NOMINAL CM
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
Z241806-1PAK
3/9Design control — primary reference
Sigma Chemical Co
No interchangeability data on file.
Other items in FSC 6640 — Laboratory Equipment and Supplies
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
6640-00-001-3348
6640-00-001-3348 · Item name not on file
6640-00-001-6670
LID,ANAEROBIC CULTURE APPARATUS
6640-00-001-6868
CONTROLLER,TIME AND TEMPERATURE,
6640-00-001-6871
6640-00-001-6871 · Item name not on file
6640-00-001-8928
6640-00-001-8928 · Item name not on file
6640-00-001-9167
6640-00-001-9167 · Item name not on file
6640-00-001-9168
6640-00-001-9168 · Item name not on file
6640-00-003-4362
6640-00-003-4362 · Item name not on file
Frequently Asked Questions
What is NSN 6640-01-581-0004?
NSN 6640-01-581-0004 is a Paper,filter, classified under FSC 6640, Laboratory Equipment and Supplies. Status: active.
What are the specifications of 6640-01-581-0004?
Key specifications for 6640-01-581-0004: Diameter: 24.000 CENTIMETERS NOMINAL CM; Special Features: PKG OF 100, GRADE 50, 6 PSI WET BURST; 0.015 PCT ASH, LAB FILTRATION PAPERS, SLOW FLOW RATE W/GOOD PARTICLE RETENTION; 0.12 MM THICKNESS; 2.7UM PORE SIZE MM. 1 specification is documented in the U.S. Government catalog.
Is NSN 6640-01-581-0004 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.