Thickness: 0.687 INCHES MINIMUM AND 0.850 INCHES MAXIMUM IN
Case: PROVIDED
Identification
NSN: 5210-01-307-3881
NIIN: 013073881
FSC: 5210 — Measuring Tools, Craftsmen's
FSG: 52 — Measuring Tools
General Description
The Optical Flat, cataloged under National Stock Number 5210-01-307-3881, is classified within Federal Supply Class 5210 (Measuring Tools, Craftsmen's) of the Measuring Tools 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5 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
5210-01-307-3881
Item Name
Optical Flat
FSC / FSG
5210 / 52 — Measuring Tools, Craftsmen's
Status
ACTIVE
Design Type
WORKING DOUBLE
Diameter
3.000 INCHES NOMINAL IN
Material
QUARTZ
Thickness
0.687 INCHES MINIMUM AND 0.850 INCHES MAXIMUM IN
Case
PROVIDED
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
D-617-3-Q-1-D
3/2Design control — primary reference
U.S. Government activity
No interchangeability data on file.
Other items in FSC 5210 — Measuring Tools, Craftsmen's
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5210-00-001-2645
5210-00-001-2645 · Item name not on file
5210-00-003-2896
5210-00-003-2896 · Item name not on file
5210-00-003-3046
5210-00-003-3046 · Item name not on file
5210-00-003-7501
5210-00-003-7501 · Item name not on file
5210-00-003-7532
5210-00-003-7532 · Item name not on file
5210-00-003-9939
5210-00-003-9939 · Item name not on file
5210-00-003-9941
GAGE,THICKNESS
5210-00-004-0663
BLADE,THICKNESS GAGE
Frequently Asked Questions
What is NSN 5210-01-307-3881?
NSN 5210-01-307-3881 is a Optical Flat, classified under FSC 5210, Measuring Tools, Craftsmen's. Status: active.
What are the specifications of 5210-01-307-3881?
Key specifications for 5210-01-307-3881: Design Type: WORKING DOUBLE; Diameter: 3.000 INCHES NOMINAL IN; Special Features: WORKING SURFACE FLATNESS ACCURACY 0.00000100 INCHES NOMINAL. ACTION ID 45471555 IN; Material: QUARTZ. 5 specifications are documented in the U.S. Government catalog.
Is NSN 5210-01-307-3881 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.