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ST3M571-5-22 — BOLT,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

ST3M571-5-22: 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: 1.375 INCHES NOMINAL IN, head_height: 0.348 INCHES NOMINAL IN, thread_class: 3A A, grip_diameter: 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-078-5979, 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
ST3M571-5-22
NSN: 5306-01-078-5979
FSC: 5306 — Bolts
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL COMP XM-13 OVERALL
head_styleDOUBLE HEXAGON W/HOLE
grip_length1.375 INCHES NOMINAL IN
head_height0.348 INCHES NOMINAL IN
thread_class3A A
grip_diameter0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN
thread_length0.536 INCHES MINIMUM AND 0.566 INCHES MAXIMUM IN
surface_finish32.0 MICROINCHES BEARING SURFACE OF HEAD
fastener_length1.911 INCHES MINIMUM AND 1.941 INCHES MAXIMUM IN
hardness_rating50.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
NSN5306-01-078-5979
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: ST3M571-5-22 · 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
•
SURFACE FINISH: 32.0 MICROINCHES THREADS
•
EXTENDED WASHER THICKNESS: 0.082 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.348 INCHES NOMINAL IN
•
FASTENER LENGTH: 1.911 INCHES MINIMUM AND 1.941 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 TY 1 OR TY 2 OR TY 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
EXTENDED WASHER DIAMETER: 0.521 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SURFACE FINISH32.0 MICROINCHES THREADS
SURFACE FINISH32.0 MICROINCHES GRIP
SURFACE FINISH32.0 MICROINCHES BEARING SURFACE OF HEAD
EXTENDED WASHER THICKNESS0.082 INCHES NOMINAL IN
HEAD HEIGHT0.348 INCHES NOMINAL IN
FASTENER LENGTH1.911 INCHES MINIMUM AND 1.941 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 TY 1 OR TY 2 OR TY 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
EXTENDED WASHER DIAMETER0.521 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
THREAD LENGTH0.536 INCHES MINIMUM AND 0.566 INCHES MAXIMUM IN
HARDNESS RATING50.0 ROCKWELL C MAXIMUM OVERALL
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
SUBSTITUTES & CROSS-REFERENCES 8
S371-5-22Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
VAL23033-5-22Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
S11-1059-5-22Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
GS1030-5-22Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
642AS0735-5Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
AIC752-5-22Same 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 ST3M571-5-22?
ST3M571-5-22 is a BOLT,CLOSE TOLERANCE.
What parts can replace ST3M571-5-22?
There are 8 known substitutes for ST3M571-5-22: S371-5-22, VAL23033-5-22, S11-1059-5-22 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ST3M571-5-22?
ST3M571-5-22 is cataloged in the U.S. Government catalog under NSN 5306-01-078-5979. 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.