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ST52647 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

ST52647: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include head_style: DISTORTED HEAD, grip_length: 0.375 INCHES MAXIMUM IN, head_height: 0.281 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 1.065 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN, fastener_length: 1.440 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-094-0846, 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
ST52647
NSN: 5306-01-094-0846
FSC: 5306 — Bolts
CAGE: K2709 — PERKINS ENGINES COMPANY LTD (GBR)
SPECIFICATIONS
head_styleDISTORTED HEAD
grip_length0.375 INCHES MAXIMUM IN
head_height0.281 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN
thread_class2A A
thread_length1.065 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
fastener_length1.440 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
hardness_rating32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
locking_featureDISTORTIONS TOP OF HEAD
thread_directionRIGHT-HAND
surface_treatmentPHOSPHATE ZINC OVERALL
width_between_flats0.612 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
nominal_thread_diameter0.438 INCHES IN
NSN5306-01-094-0846
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: ST52647 · 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: 0.281 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.440 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: DOD-P-16232 TY Z CL 2 NATIONAL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 1.065 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
•
HARDNESS RATING: 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE J429 ASSN STD ALL MATERIAL RESPONSES OVERALL
•
NOMINAL THREAD DIAMETER: 0.438 INCHES IN
•
HEAD STYLE: DISTORTED HEAD
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.281 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN
FASTENER LENGTH1.440 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONDOD-P-16232 TY Z CL 2 NATIONAL SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH1.065 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
HARDNESS RATING32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONSAE J429 ASSN STD ALL MATERIAL RESPONSES OVERALL
NOMINAL THREAD DIAMETER0.438 INCHES IN
HEAD STYLEDISTORTED HEAD
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH0.375 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 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 3
99 9940-745Reference document
Same NSN cross-reference
Reference document — Secondary reference
5306010940846Reference document
Same NSN cross-reference
Reference document — Informative reference only
MS35764-251Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ST52647?
ST52647 is a BOLT,MACHINE.
What parts can replace ST52647?
There are 3 known substitutes for ST52647: 99 9940-745, 5306010940846, MS35764-251. Substitute compatibility should be verified for your specific system.
What is the NSN for ST52647?
ST52647 is cataloged in the U.S. Government catalog under NSN 5306-01-094-0846. 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.