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Technical Data Sheet
PartsTable / COMPONENT / 05-12INCH
05-12INCH ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

HEAD,PROTRACTOR,COMBINATION SQUA. Key specifications include nondefinitive_spec/std_data: 1 TYPE, general_characteristics_item_description: CAST IRON; BLACK WRINKLE FINISH; NON-REVERSIBLE; FOR 12 IN. COMBINATION SQUARE IN.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5210-00-273-1937, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
05-12INCH
NSN: 5210-00-273-1937
FSC: 5210
CAGE: 37163 — COOPER INDUSTRIES INC LUFKIN/COOPER TOOLS DIV (USA)
SPECIFICATIONS
nondefinitive_spec/std_data1 TYPE
general_characteristics_item_descriptionCAST IRON; BLACK WRINKLE FINISH; NON-REVERSIBLE; FOR 12 IN. COMBINATION SQUARE IN
NSN5210-00-273-1937
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available HEAD,PROTRACTOR,COMBINATION SQUA TITLE COMPONENT PN 05-12INCH MFR HEAD,PROTRACTOR,COMBIN
KEY FEATURES
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: CAST IRON; BLACK WRINKLE FINISH; NON-REVERSIBLE; FOR 12 IN. COMBINATION SQUARE IN
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATA1 TYPE
GENERAL CHARACTERISTICS ITEM DESCRIPTIONCAST IRON; BLACK WRINKLE FINISH; NON-REVERSIBLE; FOR 12 IN. COMBINATION SQUARE IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
A-A-3179Interchangeable
interchangeable cross-reference
interchangeable
A-A-3179 TY2Interchangeable
interchangeable cross-reference
interchangeable
GGG-S-656 TY6CLASTBInterchangeable
interchangeable cross-reference
interchangeable
GGG-S-656Interchangeable
interchangeable cross-reference
interchangeable
5210000788949Interchangeable
interchangeable cross-reference
interchangeable
25Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 05-12INCH?
05-12INCH is a HEAD,PROTRACTOR,COMBINATION SQUA.
What parts can replace 05-12INCH?
There are 13 known substitutes for 05-12INCH: A-A-3179, A-A-3179 TY2, GGG-S-656 TY6CLASTB and 10 more. Substitute compatibility should be verified for your specific system.
Is 05-12INCH still available?
05-12INCH is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026