PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 021.450558
021.450558 ✓ 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 021.450558 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-978-9347, 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
021.450558
NSN: 5305-00-978-9347
FSC: 5305
CAGE: 0HHU1 — AEG (DEU)
SPECIFICATIONS
Part Number021.450558
NSN5305-00-978-9347
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 021.450558 · 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 DIRECTION: RIGHT-HAND
•
MATERIAL: STEEL OVERALL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
HEAD HEIGHT: 0.134 INCHES MINIMUM AND 0.138 INCHES MAXIMUM IN
•
HEAD DIAMETER: 0.218 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN
•
THREAD QUANTITY PER INCH: 32
•
INTERNAL DRIVE STYLE: HEXAGON
•
THREAD LENGTH: 0.282 INCHES MINIMUM AND 0.344 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
MATERIALSTEEL OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
HEAD HEIGHT0.134 INCHES MINIMUM AND 0.138 INCHES MAXIMUM IN
HEAD DIAMETER0.218 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN
THREAD QUANTITY PER INCH32
INTERNAL DRIVE STYLEHEXAGON
THREAD LENGTH0.282 INCHES MINIMUM AND 0.344 INCHES MAXIMUM IN
THREAD CLASS3A A
HEAD STYLEFLAT CHAMFER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
11193AInterchangeable
interchangeable cross-reference
interchangeable
00044Interchangeable
interchangeable cross-reference
interchangeable
50083Interchangeable
interchangeable cross-reference
interchangeable
7185-012Interchangeable
interchangeable cross-reference
interchangeable
B12-4RInterchangeable
interchangeable cross-reference
interchangeable
090-45099C6-12Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 021.450558?
021.450558 is a 021.450558.
What parts can replace 021.450558?
There are 22 known substitutes for 021.450558: 11193A, 00044, 50083 and 19 more. Substitute compatibility should be verified for your specific system.
Is 021.450558 still available?
021.450558 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