The Optical Flat Set, cataloged under National Stock Number 5210-00-028-9208, is classified within Federal Supply Class 5210 (Measuring Tools, Craftsmen's) of the Measuring Tools 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1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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
5210-00-028-9208
Item Name
Optical Flat Set
FSC / FSG
5210 / 52 — Measuring Tools, Craftsmen's
Status
ACTIVE
Nondefinitive Spec/std Data
1 TYPE AND 2 CLASS
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
⇄Related Items5
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5210-00-203-53713X5-8POSSIBLE MATCH
OPTICAL FLAT
Possible match (shared part number)Russell Optics, Llc
5210-00-213-9058157-109 & 157-111POSSIBLE MATCH
OPTICAL FLAT SET
Possible match (shared part number)Mitutoyo America Corp
5210-00-265-706924-10-8INDIA1-5-16INTHKPOSSIBLE MATCH
OPTICAL FLAT
Possible match (shared part number)Van Keuren
5210-00-762-8966D617-10Q1SPOSSIBLE MATCH
OPTICAL FLAT
Possible match (shared part number)Davidson Optronics Inc. Dba Doi Venture
5210-00-947-6293POSSIBLE MATCH
OPTICAL FLAT
Possible match (shared part number)
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
GG0635
4/1Identification reference
U.S. Government activity
Related Parts
5210-00-203-5371POSSIBLE MATCH
OPTICAL FLAT
3X5-8
5210-00-213-9058POSSIBLE MATCH
OPTICAL FLAT SET
157-109 & 157-111
5210-00-265-7069POSSIBLE MATCH
OPTICAL FLAT
24-10-8INDIA1-5-16INTHK
5210-00-762-8966POSSIBLE MATCH
OPTICAL FLAT
D617-10Q1S
5210-00-947-6293POSSIBLE MATCH
OPTICAL FLAT
Frequently Asked Questions
What is NSN 5210-00-028-9208?
NSN 5210-00-028-9208 is a Optical Flat Set, classified under FSC 5210, Measuring Tools, Craftsmen's. Status: active.
What NSN replaces 5210-00-028-9208?
5 possible matches (shared part number, not a government interchangeability claim): 5210-00-203-5371, 5210-00-213-9058, 5210-00-265-7069. Verify interchangeability with system specifications before substitution.
What are the specifications of 5210-00-028-9208?
Key specifications for 5210-00-028-9208: Nondefinitive Spec/std Data: 1 TYPE AND 2 CLASS; Special Features: 3) FUSED QUARTZ,REFERENCE TYPE,DOUBLE SURFACE,3 IN. DIA.,0.625 IN. THK,0.000001 IN. FLATNESS ACCURACY,WITH WOODEN CASE,SURFACE ANGLE SHALL B 10 TO 15 MINUTES OF ARC TO EACH OTHER IN. 1 specification is documented in the U.S. Government catalog.
Is NSN 5210-00-028-9208 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.