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ST3M430 — SCREW,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

ST3M430: SCREW,CLOSE TOLERANCE.

The SCREW,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: TITANIUM ALLOY OVERALL, head_style: FLAT COUNTERSUNK UNDERCUT, grip_length: 1.25 INCHES NOMINAL IN, head_height: 0.0439 INCHES MINIMUM AND 0.0459 INCHES MAXIMUM IN, point_style: FLAT, point_length: 0.032 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-701-3110, 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
ST3M430
NSN: 5305-01-701-3110
NIINs: 017013110, 017194892, 017196421, 017200300
FSC: 5305 — Screws
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialTITANIUM ALLOY OVERALL
head_styleFLAT COUNTERSUNK UNDERCUT
grip_length1.25 INCHES NOMINAL IN
head_height0.0439 INCHES MINIMUM AND 0.0459 INCHES MAXIMUM IN
point_styleFLAT
point_length0.032 INCHES NOMINAL IN
thread_class3A A
grip_diameter0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN
head_diameter0.3765 INCHES MINIMUM AND 0.3813 INCHES MAXIMUM IN
thread_length0.406 INCHES NOMINAL IN
fastener_length0.5775 INCHES MINIMUM AND 0.6245 INCHES MAXIMUM IN
special_featuresITEM INCLUDES O-RING PER ST7M251
NSN5305-01-701-3110
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: ST3M430 · 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 HEIGHT: 0.0713 INCHES MINIMUM AND 0.0733 INCHES MAXIMUM IN
•
POINT LENGTH: 0.032 INCHES NOMINAL IN
•
FASTENER LENGTH: 1.703 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.469 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: NAS621 ASSN STD SINGLE MATERIAL RESPONSE FASTENER
•
POINT CHAMFER ANGLE: 45.00 DEGREES NOMINAL
•
NOMINAL THREAD DIAMETER: 0.2500 INCHES IN
•
FEATURES PROVIDED: O RING
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.0713 INCHES MINIMUM AND 0.0733 INCHES MAXIMUM IN
POINT LENGTH0.032 INCHES NOMINAL IN
FASTENER LENGTH1.703 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN
THREAD LENGTH0.469 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONNAS621 ASSN STD SINGLE MATERIAL RESPONSE FASTENER
POINT CHAMFER ANGLE45.00 DEGREES NOMINAL
NOMINAL THREAD DIAMETER0.2500 INCHES IN
FEATURES PROVIDEDO RING
HEAD STYLEFLAT COUNTERSUNK UNDERCUT
THREAD DIRECTIONRIGHT-HAND
SUBSTITUTES & CROSS-REFERENCES 6
WC8137-4-20MSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
HT8137-4-20ASSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
ST3M460V4-40-ASSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
BM33024V-4-20-USame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
HT271A4-20Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
100179-4-20-ASSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ST3M430?
ST3M430 is a SCREW,CLOSE TOLERANCE.
What parts can replace ST3M430?
There are 6 known substitutes for ST3M430: WC8137-4-20M, HT8137-4-20AS, ST3M460V4-40-AS and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ST3M430?
ST3M430 is cataloged in the U.S. Government catalog under NSN 5305-01-701-3110. 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.