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ST3M571-12-30 — BOLT,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

ST3M571-12-30: BOLT,CLOSE TOLERANCE.

The BOLT,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, head_style: DOUBLE HEXAGON W/HOLE, grip_length: 1.865 INCHES MINIMUM AND 1.885 INCHES MAXIMUM IN, head_height: 0.701 INCHES MINIMUM AND 0.721 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.7485 INCHES MINIMUM AND 0.7490 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-332-4560, 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
ST3M571-12-30
NSN: 5306-00-332-4560
FSC: 5306 — Bolts
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
head_styleDOUBLE HEXAGON W/HOLE
grip_length1.865 INCHES MINIMUM AND 1.885 INCHES MAXIMUM IN
head_height0.701 INCHES MINIMUM AND 0.721 INCHES MAXIMUM IN
thread_class3A A
grip_diameter0.7485 INCHES MINIMUM AND 0.7490 INCHES MAXIMUM IN
thread_length1.027 INCHES MINIMUM AND 1.077 INCHES MAXIMUM IN
fastener_length2.912 INCHES MINIMUM AND 2.942 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_between_flats0.803 INCHES MINIMUM AND 0.814 INCHES MAXIMUM IN
nominal_thread_diameter0.750 INCHES IN
NSN5306-00-332-4560
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: ST3M571-12-30 · 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
•
EXTENDED WASHER THICKNESS: 0.168 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.701 INCHES MINIMUM AND 0.721 INCHES MAXIMUM IN
•
FASTENER LENGTH: 2.912 INCHES MINIMUM AND 2.942 INCHES MAXIMUM IN
•
EXTENDED WASHER DIAMETER: 1.220 INCHES MINIMUM AND 1.230 INCHES MAXIMUM IN
•
THREAD LENGTH: 1.027 INCHES MINIMUM AND 1.077 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.750 INCHES IN
•
HEAD STYLE: DOUBLE HEXAGON W/HOLE
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.168 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
HEAD HEIGHT0.701 INCHES MINIMUM AND 0.721 INCHES MAXIMUM IN
FASTENER LENGTH2.912 INCHES MINIMUM AND 2.942 INCHES MAXIMUM IN
EXTENDED WASHER DIAMETER1.220 INCHES MINIMUM AND 1.230 INCHES MAXIMUM IN
THREAD LENGTH1.027 INCHES MINIMUM AND 1.077 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.750 INCHES IN
HEAD STYLEDOUBLE HEXAGON W/HOLE
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH1.865 INCHES MINIMUM AND 1.885 INCHES MAXIMUM IN
WIDTH BETWEEN FLATS0.803 INCHES MINIMUM AND 0.814 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-004-7044 5306-00-007-6129 5306-00-008-7899 5306-00-009-4739 5306-00-118-7332 5306-00-151-1777 5306-00-255-4507 5306-01-101-2459
SUBSTITUTES & CROSS-REFERENCES 3
74328-12-30Reference document
Same NSN cross-reference
Reference document — Secondary reference
BM3326-12-30Reference document
Same NSN cross-reference
Reference document — Secondary reference
11831-12-30Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ST3M571-12-30?
ST3M571-12-30 is a BOLT,CLOSE TOLERANCE.
What parts can replace ST3M571-12-30?
There are 3 known substitutes for ST3M571-12-30: 74328-12-30, BM3326-12-30, 11831-12-30. Substitute compatibility should be verified for your specific system.
What is the NSN for ST3M571-12-30?
ST3M571-12-30 is cataloged in the U.S. Government catalog under NSN 5306-00-332-4560. 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.