PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 021.450520
021.450520 ✓ 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 021.450520 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-763-6962, 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
021.450520
NSN: 5305-00-763-6962
FSC: 5305
CAGE: D1597 — AIM INFRAROT-MODULE GMBH (DEU)
SPECIFICATIONS
Part Number021.450520
NSN5305-00-763-6962
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 021.450520 · 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
•
HEAD STYLE: FLAT COUNTERSUNK
•
NOMINAL THREAD DIAMETER: 0.138 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
•
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
•
MINIMUM TENSILE STRENGTH: 80 POUNDS PER SQUARE INCH LBS
•
HEAD DIAMETER: 0.244 INCHES MINIMUM AND 0.279 INCHES MAXIMUM IN
•
SCREW MATERIAL: STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316
•
SCREW SURFACE TREATMENT: PASSIVATE
TECHNICAL CHARACTERISTICS (FLIS)
HEAD STYLEFLAT COUNTERSUNK
NOMINAL THREAD DIAMETER0.138 INCHES IN
THREAD DIRECTIONRIGHT-HAND
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
MINIMUM TENSILE STRENGTH80 POUNDS PER SQUARE INCH LBS
HEAD DIAMETER0.244 INCHES MINIMUM AND 0.279 INCHES MAXIMUM IN
SCREW MATERIALSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316
SCREW SURFACE TREATMENTPASSIVATE
FASTENER LENGTH0.281 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
561-312C2-52Interchangeable
interchangeable cross-reference
interchangeable
0411-222Interchangeable
interchangeable cross-reference
interchangeable
MS35249-34Interchangeable
interchangeable cross-reference
interchangeable
22-243Interchangeable
interchangeable cross-reference
interchangeable
22565Interchangeable
interchangeable cross-reference
interchangeable
855609Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 021.450520?
021.450520 is a 021.450520.
What parts can replace 021.450520?
There are 22 known substitutes for 021.450520: 561-312C2-52, 0411-222, MS35249-34 and 19 more. Substitute compatibility should be verified for your specific system.
Is 021.450520 still available?
021.450520 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