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Technical Data Sheet
PartsTable / COMPONENT / 280451PC73
280451PC73 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: HEXAGON, head_height: 0.317 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 1.721 INCHES MINIMUM AND 1.875 INCHES MAXIMUM IN, screw_material: STEEL CORROSION RESISTING, fastener_length: 1.812 INCHES MINIMUM AND 1.875 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-272-1587, 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
280451PC73
NSN: 5305-00-272-1587
FSC: 5305
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
head_styleHEXAGON
head_height0.317 INCHES NOMINAL IN
thread_class2A A
thread_length1.721 INCHES MINIMUM AND 1.875 INCHES MAXIMUM IN
screw_materialSTEEL CORROSION RESISTING
fastener_length1.812 INCHES MINIMUM AND 1.875 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
width_between_flats0.750 INCHES NOMINAL IN
internal_drive_styleCROSS RECESS TYPE 1
nominal_thread_diameter0.500 INCHES IN
minimum_tensile_strength80000 POUNDS PER SQUARE INCH LBS
thread_quantity_per_inch13
NSN5305-00-272-1587
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 280451PC73 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
THREAD CLASS: 2A A
•
NOMINAL THREAD DIAMETER: 0.500 INCHES IN
•
THREAD QUANTITY PER INCH: 13
•
HEAD STYLE: HEXAGON
•
FASTENER LENGTH: 1.812 INCHES MINIMUM AND 1.875 INCHES MAXIMUM IN
•
DEPARTURE FROM CITED DESIGNATOR: AS MODIFIED BY THREAD SIZE AND SERIES/TYPE DESIGNATOR AND FASTENER LENGTH
•
MINIMUM TENSILE STRENGTH: 80000 POUNDS PER SQUARE INCH LBS
•
SCREW MATERIAL: STEEL CORROSION RESISTING
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS2A A
NOMINAL THREAD DIAMETER0.500 INCHES IN
THREAD QUANTITY PER INCH13
HEAD STYLEHEXAGON
FASTENER LENGTH1.812 INCHES MINIMUM AND 1.875 INCHES MAXIMUM IN
DEPARTURE FROM CITED DESIGNATORAS MODIFIED BY THREAD SIZE AND SERIES/TYPE DESIGNATOR AND FASTENER LENGTH
MINIMUM TENSILE STRENGTH80000 POUNDS PER SQUARE INCH LBS
SCREW MATERIALSTEEL CORROSION RESISTING
THREAD LENGTH1.721 INCHES MINIMUM AND 1.875 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
MIL-S-1222HInterchangeable
interchangeable cross-reference
interchangeable
MILB857TYPEBInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 280451PC73?
280451PC73 is a SCREW,MACHINE.
What parts can replace 280451PC73?
There are 2 known substitutes for 280451PC73: MIL-S-1222H, MILB857TYPEB. Substitute compatibility should be verified for your specific system.
What is the NSN for 280451PC73?
280451PC73 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-272-1587. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026