The Test Paper and Color Chart,ph, cataloged under National Stock Number 6640-01-249-4499, is classified within Federal Supply Class 6640 (Laboratory Equipment and Supplies) of the Instruments and Laboratory Equipment group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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.
Technical Specifications
Parameter
Value
NSN
6640-01-249-4499
Item Name
Test Paper and Color Chart,ph
FSC / FSG
6640 / 66 — Laboratory Equipment and Supplies
Status
ACTIVE
Length
15.000 INCHES NOMINAL IN
Ph Value Range
+4.5 TO 7.5
Ph Color Chart Graduation
0.5
Physical Form
ROLL
Width
0.250 INCHES NOMINAL IN
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
⇄Related Items4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
2840-01-294-514037633POSSIBLE MATCH
HOUSING,ANTIFRICTION BEARING,AIR
Possible match (shared part number)Williams International Co., L.l.c.
3120-01-305-761803763BCE4POSSIBLE MATCH
BUSHING,SLEEVE
Possible match (shared part number)Leslie Controls, Inc. Dba Leslie Controls Inc
5930-01-331-506237633POSSIBLE MATCH
SWITCH,CROSS POINT
Possible match (shared part number)Raven Electronics Corp
3020-01-466-788437633POSSIBLE MATCH
GEAR RACK
Possible match (shared part number)Moog Inc. Dba Ampac-Isp Corp
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
376-33
3/2Design control — primary reference
U.S. Government activity
Related Parts
2840-01-294-5140POSSIBLE MATCH
HOUSING,ANTIFRICTION BEARING,AIR
37633
3120-01-305-7618POSSIBLE MATCH
BUSHING,SLEEVE
03763BCE4
5930-01-331-5062POSSIBLE MATCH
SWITCH,CROSS POINT
37633
3020-01-466-7884POSSIBLE MATCH
GEAR RACK
37633
Frequently Asked Questions
What is NSN 6640-01-249-4499?
NSN 6640-01-249-4499 is a Test Paper and Color Chart,ph, classified under FSC 6640, Laboratory Equipment and Supplies. Status: active.
What NSN replaces 6640-01-249-4499?
4 possible matches (shared part number, not a government interchangeability claim): 2840-01-294-5140, 3120-01-305-7618, 5930-01-331-5062. Verify interchangeability with system specifications before substitution.
What are the specifications of 6640-01-249-4499?
Key specifications for 6640-01-249-4499: Length: 15.000 INCHES NOMINAL IN; Ph Value Range: +4.5 TO 7.5; Ph Color Chart Graduation: 0.5; Physical Form: ROLL. 5 specifications are documented in the U.S. Government catalog.
Is NSN 6640-01-249-4499 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.