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PartsTable / COMPONENT / H503
H503 ✓ 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

MOUNTING PAD,ELECTRICAL-ELECTRON. Key specifications include shape: STRAIGHT, length: 1.500 INCHES NOMINAL IN, diameter: 0.250 INCHES NOMINAL IN, material: STEEL, overall_width: 8.000 INCHES NOMINAL IN, mounting_shank: INCLUDED. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3455-00-517-6023, 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
H503
NSN: 3455-00-517-6023
FSC: 3455
CAGE: 26190 — ROTA FILE CORPORATION DBA ROTA TOOL (USA)
SPECIFICATIONS
shapeSTRAIGHT
length1.500 INCHES NOMINAL IN
diameter0.250 INCHES NOMINAL IN
materialSTEEL
overall_width8.000 INCHES NOMINAL IN
mounting_shankINCLUDED
overall_height5.380 INCHES NOMINAL IN
overall_length16.000 INCHES NOMINAL IN
overall_diameter0.250 INCHES NOMINAL IN
style_designatorTREE SHAPE
features_providedCHIPBREAKER
removability_featureNOT INCLUDED
NSN3455-00-517-6023
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available MOUNTING PAD,ELECTRICAL-ELECTRON TITLE COMPONENT PN H503 MFR MOUNTING PAD,ELECTRICA
KEY FEATURES
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND B STYLE AND 2 SIZE AND B CLASS
•
REMOVABILITY FEATURE: NOT INCLUDED
•
CUTTER TOOTH STYLE DESIGNATOR: C7
•
OVERALL DIAMETER: 0.250 INCHES NOMINAL IN
•
MATERIAL: STEEL
•
SHAPE: STRAIGHT
•
SHANK OVERALL LENGTH: 2.250 INCHES NOMINAL IN
•
FEATURES PROVIDED: CHIPBREAKER
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATA1 TYPE AND B STYLE AND 2 SIZE AND B CLASS
REMOVABILITY FEATURENOT INCLUDED
CUTTER TOOTH STYLE DESIGNATORC7
OVERALL DIAMETER0.250 INCHES NOMINAL IN
MATERIALSTEEL
SHAPESTRAIGHT
SHANK OVERALL LENGTH2.250 INCHES NOMINAL IN
FEATURES PROVIDEDCHIPBREAKER
DIAMETER0.250 INCHES NOMINAL IN
LENGTH1.500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
H503Interchangeable
interchangeable cross-reference
interchangeable
A-A-51151CInterchangeable
interchangeable cross-reference
interchangeable
A-A-51151Interchangeable
interchangeable cross-reference
interchangeable
R-301MInterchangeable
interchangeable cross-reference
interchangeable
5137HAInterchangeable
interchangeable cross-reference
interchangeable
X419Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is H503?
H503 is a MOUNTING PAD,ELECTRICAL-ELECTRON.
What parts can replace H503?
There are 28 known substitutes for H503: H503, A-A-51151C, A-A-51151 and 25 more. Substitute compatibility should be verified for your specific system.
Is H503 still available?
H503 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