PartsTable
Technical Data Sheet
Download PDF

ST3M455-8L12M — SCREW,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

ST3M455-8L12M: SCREW,CLOSE TOLERANCE.

The SCREW,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: FLAT COUNTERSUNK, grip_length: 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.4990 INCHES MINIMUM AND 0.4995 INCHES MAXIMUM IN, head_diameter: 0.688 INCHES MINIMUM AND 0.755 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-049-4053, 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
ST3M455-8L12M
NSN: 5305-01-049-4053
FSC: 5305 — Screws
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleFLAT COUNTERSUNK
grip_length0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
thread_class3A A
grip_diameter0.4990 INCHES MINIMUM AND 0.4995 INCHES MAXIMUM IN
head_diameter0.688 INCHES MINIMUM AND 0.755 INCHES MAXIMUM IN
thread_length0.756 INCHES MINIMUM AND 0.806 INCHES MAXIMUM IN
fastener_length1.516 INCHES MINIMUM AND 1.546 INCHES MAXIMUM IN
special_featuresDRY FILM LUBRICANT P.S. 18021 CL 1
thread_directionRIGHT-HAND
countersink_angle100.0 DEGREES NOMINAL
surface_treatmentPASSIVATE OVERALL
NSN5305-01-049-4053
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: ST3M455-8L12M · 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
•
FASTENER LENGTH: 1.516 INCHES MINIMUM AND 1.546 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.756 INCHES MINIMUM AND 0.806 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.500 INCHES IN
•
HEAD STYLE: FLAT COUNTERSUNK
•
THREAD DIRECTION: RIGHT-HAND
•
SPECIFICATION/STANDARD DATA: 76301-ST3-455 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
GRIP LENGTH: 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
•
GRIP DIAMETER: 0.4990 INCHES MINIMUM AND 0.4995 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
FASTENER LENGTH1.516 INCHES MINIMUM AND 1.546 INCHES MAXIMUM IN
THREAD LENGTH0.756 INCHES MINIMUM AND 0.806 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.500 INCHES IN
HEAD STYLEFLAT COUNTERSUNK
THREAD DIRECTIONRIGHT-HAND
SPECIFICATION/STANDARD DATA76301-ST3-455 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
GRIP LENGTH0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
GRIP DIAMETER0.4990 INCHES MINIMUM AND 0.4995 INCHES MAXIMUM IN
SPECIAL FEATURESDRY FILM LUBRICANT P.S. 18021 CL 1
SURFACE TREATMENTPASSIVATE OVERALL
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831
SUBSTITUTES & CROSS-REFERENCES 2
11907-8L12MSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
HT4024L8-12MReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
Ready to buy ST3M455-8L12M?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is ST3M455-8L12M?
ST3M455-8L12M is a SCREW,CLOSE TOLERANCE.
What parts can replace ST3M455-8L12M?
There are 2 known substitutes for ST3M455-8L12M: 11907-8L12M, HT4024L8-12M. Substitute compatibility should be verified for your specific system.
What is the NSN for ST3M455-8L12M?
ST3M455-8L12M is cataloged in the U.S. Government catalog under NSN 5305-01-049-4053. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — ST3M455-8L12M

✓ 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.