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ST3M571-3-12 — BOLT,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

ST3M571-3-12: BOLT,CLOSE TOLERANCE.

The BOLT,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: STEEL COMP XM-13 OVERALL, head_style: DOUBLE HEXAGON W/HOLE, grip_length: 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN, head_height: 0.265 INCHES MINIMUM AND 0.285 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-630-4776, 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
ST3M571-3-12
NSN: 5306-00-630-4776
FSC: 5306 — Bolts
CAGE: 58998 — FASTENER INNOVATION TECHNOLOGY, INC. DBA F I T (USA)
SPECIFICATIONS
materialSTEEL COMP XM-13 OVERALL
head_styleDOUBLE HEXAGON W/HOLE
grip_length0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
head_height0.265 INCHES MINIMUM AND 0.285 INCHES MAXIMUM IN
thread_class3A A
grip_diameter0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN
thread_length0.372 INCHES MINIMUM AND 0.422 INCHES MAXIMUM IN
fastener_length1.132 INCHES MINIMUM AND 1.162 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_between_flats0.235 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
nominal_thread_diameter0.190 INCHES IN
NSN5306-00-630-4776
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: ST3M571-3-12 · 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: 0.054 INCHES MINIMUM AND 0.074 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.265 INCHES MINIMUM AND 0.285 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.132 INCHES MINIMUM AND 1.162 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
EXTENDED WASHER DIAMETER: 0.340 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.372 INCHES MINIMUM AND 0.422 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
HEAD STYLE: DOUBLE HEXAGON W/HOLE
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.054 INCHES MINIMUM AND 0.074 INCHES MAXIMUM IN
HEAD HEIGHT0.265 INCHES MINIMUM AND 0.285 INCHES MAXIMUM IN
FASTENER LENGTH1.132 INCHES MINIMUM AND 1.162 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
EXTENDED WASHER DIAMETER0.340 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN
THREAD LENGTH0.372 INCHES MINIMUM AND 0.422 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLEDOUBLE HEXAGON W/HOLE
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 5
74328-3-12Reference document
Same NSN cross-reference
Reference document — Secondary reference
BM3326-3-12Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
MB84-3-12Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
VAL23033-3-12Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
VS3060-3-12Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ST3M571-3-12?
ST3M571-3-12 is a BOLT,CLOSE TOLERANCE.
What parts can replace ST3M571-3-12?
There are 5 known substitutes for ST3M571-3-12: 74328-3-12, BM3326-3-12, MB84-3-12 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ST3M571-3-12?
ST3M571-3-12 is cataloged in the U.S. Government catalog under NSN 5306-00-630-4776. 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.