PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

42-321Level and Plumb

The Stanley Works Dba Stanley Proto · NSN 5210-01-428-5550 · FSC 5210 · No Item Name Available
Verified by PartsTable
NSN 5210-01-428-5550 — this item is cataloged by the U.S. Government under National Stock Number 5210-01-428-5550. Primary manufacturer part number: 42-321.
Features
  • Level and Plumb — FSC 5210
  • Design Type: DOUBLE FACE
  • Adjustability: NONADJUSTABLE
  • Overall Outside Dimensions: 24 IN. LG IN
  • Vial Arrangement: PAIRS LEVEL
  • Vial Quantity: 4 PLUMB
  • Material: WOOD
  • Vial Surface Finish: UNGROUND LEVEL
Applications
  • Applications requiring Wood construction
General Description

The Level and Plumb, cataloged under National Stock Number 5210-01-428-5550, is classified within Federal Supply Class 5210 (No Item Name Available) of the Measuring Tools group. The primary manufacturer of record is The Stanley Works Dba Stanley Proto. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5210-01-428-5550
Primary Part Number42-321
Item NameLevel and Plumb
FSC / FSG5210 / 52 — No Item Name Available
ManufacturerThe Stanley Works Dba Stanley Proto
StatusACTIVE
Design TypeDOUBLE FACE
AdjustabilityNONADJUSTABLE
Overall Outside Dimensions24 IN. LG IN
Vial ArrangementPAIRS LEVEL
Vial Quantity4 PLUMB
MaterialWOOD
Vial Surface FinishUNGROUND LEVEL
Vial Surface FinishUNGROUND PLUMB
Vial Quantity2 LEVEL
Vial ArrangementPAIRS PLUMB
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
3455-00-250-07711743-0375 INTERCHANGEABLE
Cutter,milling,end
New York Twist Drill Inc
2940-01-082-0096AF3393 INTERCHANGEABLE
Filter Element,intake Air Cleane
Arvinmeritor Inc
5133-01-102-3327 INTERCHANGEABLE
Drill,twist
5950-01-138-64365024051904 INTERCHANGEABLE
Coil,radio Frequency
Riimic, Llc Dba Sunair Electronics
5950-01-330-72298509747-1 INTERCHANGEABLE
Transformer,current
Honeywell International Inc. Dba Honeywell International
Cross-Reference Index
Part NumberManufacturer
42-321 Stanley Tools Div of Stanley Works (USA)
42-321 PRIMARY The Stanley Works Dba Stanley Proto (USA)
6R128 W.w. Grainger, Inc. Div Government Sales Division (USA)
Related Parts
3455-00-250-0771INTERCHANGEABLE
CUTTER,MILLING,END
1743-0375
2940-01-082-0096INTERCHANGEABLE
FILTER ELEMENT,INTAKE AIR CLEANE
AF3393
5133-01-102-3327INTERCHANGEABLE
DRILL,TWIST
5950-01-138-6436INTERCHANGEABLE
COIL,RADIO FREQUENCY
5024051904
5950-01-330-7229INTERCHANGEABLE
TRANSFORMER,CURRENT
8509747-1

Frequently Asked Questions

What is NSN 5210-01-428-5550?

NSN 5210-01-428-5550 is a Level and Plumb, manufactured by The Stanley Works Dba Stanley Proto, classified under FSC 5210 (No Item Name Available). Status: active.

What are the part numbers for NSN 5210-01-428-5550?

NSN 5210-01-428-5550 has 3 cross-referenced part numbers: 42-321 (Stanley Tools Div of Stanley Works), 42-321 (The Stanley Works Dba Stanley Proto), 6R128 (W.w. Grainger, Inc. Div Government Sales Division).

What NSN replaces 5210-01-428-5550?

There are 5 known substitutes for 5210-01-428-5550: 3455-00-250-0771, 2940-01-082-0096, 5133-01-102-3327 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 42-321?

Key specifications for 42-321: Design Type: DOUBLE FACE; Adjustability: NONADJUSTABLE; Overall Outside Dimensions: 24 IN. LG IN; Vial Arrangement: PAIRS LEVEL. 11 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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