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RTBM300-40 — THUMBSCREW

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

RTBM300-40: THUMBSCREW.

The THUMBSCREW is a the manufacturer industrial component. Key specifications include thread_length: 0.500 INCHES NOMINAL IN, end_item_identification: USED ON NSA SUN VISOR SYSTEM FOR TBM AIRCRAFT, nominal_thread_diameter: 0.250 INCHES IN, thread_series_designator: UNIFIED NATIONAL COARSE (UNC). This part is cataloged in the U.S.

Government catalog under NSN 5305-01-433-3612, 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
RTBM300-40
NSN: 5305-01-433-3612
FSC: 5305 — Screws
CAGE: 0LN15 — ADVANCED MULTIMEDIA PRODUCTS CORP DBA ROSEN PRODUCTS (USA)
SPECIFICATIONS
thread_length0.500 INCHES NOMINAL IN
end_item_identificationUSED ON NSA SUN VISOR SYSTEM FOR TBM AIRCRAFT
nominal_thread_diameter0.250 INCHES IN
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5305-01-433-3612
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: RTBM300-40 · 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 LENGTH: 0.500 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
TECHNICAL CHARACTERISTICS
THREAD LENGTH0.500 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
END ITEM IDENTIFICATIONUSED ON NSA SUN VISOR SYSTEM FOR TBM AIRCRAFT
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-001-5016 5305-00-001-9160 5305-00-001-9629 5305-00-001-9742 5305-00-001-9768 5305-00-003-4306 5305-00-003-6694 5305-00-003-6753
SUBSTITUTES & CROSS-REFERENCES 1
Z00.N7907262900TBMReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is RTBM300-40?
RTBM300-40 is a THUMBSCREW.
What parts can replace RTBM300-40?
There is 1 known substitute for RTBM300-40: Z00.N7907262900TBM. Substitute compatibility should be verified for your specific system.
What is the NSN for RTBM300-40?
RTBM300-40 is cataloged in the U.S. Government catalog under NSN 5305-01-433-3612. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.