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PartsTable / COMPONENT / 303 1/2-13 UNC
303 1/2-13 UNC ✓ 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

The 303 1/2-13 UNC is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5136-00-528-2297, 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
303 1/2-13 UNC
NSN: 5136-00-528-2297
FSC: 5136
CAGE: 1NEX4 — KENNAMETAL INC. DIV KENNAMETAL INDUSTRIAL PRODUCTS GROUP (USA)
SPECIFICATIONS
Part Number303 1/2-13 UNC
NSN5136-00-528-2297
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available 303 1/2-13 UNC TITLE COMPONENT PN 303 1/2-13 UNC MFR 303 1/2-13 UNC
KEY FEATURES
•
THREAD PITCH DIAMETERS: +0.4505 TO 0.4530 INCHES IN
•
FLUTE QUANTITY: 4
•
STARTING CHAMFER TYPE: BOTTOMING
•
THREAD FORMING METHOD: CUT
•
WIDTH ACROSS FLATS: 0.275 INCHES NOMINAL IN
•
SPECIFICATION/STANDARD DATA: 05047-ASME B94.9 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD PITCH DIAMETERS+0.4505 TO 0.4530 INCHES IN
OVERALL LENGTH3.375 INCHES NOMINAL IN
FLUTE QUANTITY4
STARTING CHAMFER TYPEBOTTOMING
THREAD FORMING METHODCUT
WIDTH ACROSS FLATS0.275 INCHES NOMINAL IN
SPECIFICATION/STANDARD DATA05047-ASME B94.9 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
MATERIALSTEEL OVERALL
LENGTH0.438 INCHES NOMINAL SQUARE END IN
THREAD STRUCTUREREGULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
17187Interchangeable
interchangeable cross-reference
interchangeable
16280Interchangeable
interchangeable cross-reference
interchangeable
570C-605Interchangeable
interchangeable cross-reference
interchangeable
105Z45Interchangeable
interchangeable cross-reference
interchangeable
A-A-51145 TY 1 FORM BInterchangeable
interchangeable cross-reference
interchangeable
0F506Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 303 1/2-13 UNC?
303 1/2-13 UNC is a 303 1/2-13 UNC.
What parts can replace 303 1/2-13 UNC?
There are 26 known substitutes for 303 1/2-13 UNC: 17187, 16280, 570C-605 and 23 more. Substitute compatibility should be verified for your specific system.
Is 303 1/2-13 UNC still available?
303 1/2-13 UNC 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