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ST3M571-3-18 — BOLT,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

ST3M571-3-18: BOLT,SHOULDER.

The BOLT,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL COMP XM-13 OVERALL, head_style: DOUBLE HEXAGON W/HOLE, grip_length: 1.115 INCHES MINIMUM AND 1.135 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 5306-01-045-9502, 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
ST3M571-3-18
NSN: 5306-01-045-9502
NIINs: 010459502, 012475288
FSC: 5306 — Bolts
CAGE: L4528 — LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC (CAN)
SPECIFICATIONS
materialSTEEL COMP XM-13 OVERALL
head_styleDOUBLE HEXAGON W/HOLE
grip_length1.115 INCHES MINIMUM AND 1.135 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_length1.507 INCHES MINIMUM AND 1.537 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_between_flats0.251 INCHES NOMINAL IN
nominal_thread_diameter0.190 INCHES IN
NSN5306-01-045-9502
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: ST3M571-3-18 · 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: 0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.440 INCHES MINIMUM AND 1.487 INCHES MAXIMUM IN
•
SHOULDER LENGTH: 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM FIRST SHOULDER IN
•
SHOULDER DIAMETER: 0.2177 INCHES MINIMUM AND 0.2182 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD LENGTH: 0.305 INCHES MINIMUM AND 0.372 INCHES MAXIMUM IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
HEAD STYLE: DOUBLE HEXAGON
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
FASTENER LENGTH1.440 INCHES MINIMUM AND 1.487 INCHES MAXIMUM IN
SHOULDER LENGTH1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM FIRST SHOULDER IN
SHOULDER DIAMETER0.2177 INCHES MINIMUM AND 0.2182 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH0.305 INCHES MINIMUM AND 0.372 INCHES MAXIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLEDOUBLE HEXAGON
THREAD DIRECTIONRIGHT-HAND
SPECIFICATION/STANDARD DATA76301-ST3-507 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
SUBSTITUTES & CROSS-REFERENCES 6
VS3038-3-18Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
MB89-3-18Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
S11-1062-3-18Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
ST3M507-3-18Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
109453-3-18YReference document
Same NSN cross-reference
Reference document — Secondary reference
PBF1366-3-18Same 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 ST3M571-3-18?
ST3M571-3-18 is a BOLT,SHOULDER.
What parts can replace ST3M571-3-18?
There are 6 known substitutes for ST3M571-3-18: VS3038-3-18, MB89-3-18, S11-1062-3-18 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ST3M571-3-18?
ST3M571-3-18 is cataloged in the U.S. Government catalog under NSN 5306-01-045-9502. 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.