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Technical Data Sheet
PartsTable / COMPONENT / 28221ADX
28221ADX ✓ 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,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include head_style: HEXAGON, head_height: 0.100 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 0.500 INCHES NOMINAL IN, fastener_length: 0.500 INCHES NOMINAL IN, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-472-2192, 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
28221ADX
NSN: 5305-01-472-2192
FSC: 5305
CAGE: 1VN02 — AIRDALE EXPRESS LLC DIV AIRDALE EXPRESS (USA)
SPECIFICATIONS
head_styleHEXAGON
head_height0.100 INCHES NOMINAL IN
thread_class2A A
thread_length0.500 INCHES NOMINAL IN
fastener_length0.500 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_between_flats0.250 INCHES NOMINAL IN
nominal_thread_diameter0.164 INCHES IN
thread_quantity_per_inch32
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5305-01-472-2192
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 28221ADX · 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
•
WIDTH BETWEEN FLATS: 0.250 INCHES NOMINAL IN
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
THREAD QUANTITY PER INCH: 32
•
HEAD STYLE: HEXAGON
•
HEAD HEIGHT: 0.100 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.500 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.164 INCHES IN
•
THREAD CLASS: 2A A
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH BETWEEN FLATS0.250 INCHES NOMINAL IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH32
HEAD STYLEHEXAGON
HEAD HEIGHT0.100 INCHES NOMINAL IN
FASTENER LENGTH0.500 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.164 INCHES IN
THREAD CLASS2A A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
173069H1Interchangeable
interchangeable cross-reference
interchangeable
28221Interchangeable
interchangeable cross-reference
interchangeable
832864-1Interchangeable
interchangeable cross-reference
interchangeable
110-28375 ITEM 4Interchangeable
interchangeable cross-reference
interchangeable
110-28375Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 28221ADX?
28221ADX is a SCREW,CAP,HEXAGON HEAD.
What parts can replace 28221ADX?
There are 5 known substitutes for 28221ADX: 173069H1, 28221, 832864-1 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 28221ADX?
28221ADX is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-472-2192. 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