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5B2553 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

5B2553: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, grip_length: 2.360 INCHES NOMINAL IN, head_height: 0.273 INCHES MINIMUM AND 0.289 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.484 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-426-5149, 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
5B2553
NSN: 5306-00-426-5149
FSC: 5306 — Bolts
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
grip_length2.360 INCHES NOMINAL IN
head_height0.273 INCHES MINIMUM AND 0.289 INCHES MAXIMUM IN
thread_class3A A
thread_length0.484 INCHES NOMINAL IN
fastener_length2.844 INCHES NOMINAL IN
hardness_rating30.0 ROCKWELL C NOMINAL OVERALL
special_featuresW/HEADER POINT
thread_directionRIGHT-HAND
features_providedUNFINISHED HEAD
width_between_flats0.5510 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM IN
NSN5306-00-426-5149
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 5B2553 · 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: 0.273 INCHES MINIMUM AND 0.289 INCHES MAXIMUM IN
•
FASTENER LENGTH: 2.844 INCHES NOMINAL IN
•
THREAD LENGTH: 0.484 INCHES NOMINAL IN
•
HARDNESS RATING: 30.0 ROCKWELL C NOMINAL OVERALL
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
FEATURES PROVIDED: UNFINISHED HEAD
•
HEAD STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.273 INCHES MINIMUM AND 0.289 INCHES MAXIMUM IN
FASTENER LENGTH2.844 INCHES NOMINAL IN
THREAD LENGTH0.484 INCHES NOMINAL IN
HARDNESS RATING30.0 ROCKWELL C NOMINAL OVERALL
NOMINAL THREAD DIAMETER0.375 INCHES IN
FEATURES PROVIDEDUNFINISHED HEAD
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH2.360 INCHES NOMINAL IN
WIDTH BETWEEN FLATS0.5510 INCHES MINIMUM AND 0.5625 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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 5B2553?
5B2553 is a BOLT,MACHINE.
What is the NSN for 5B2553?
5B2553 is cataloged in the U.S. Government catalog under NSN 5306-00-426-5149. 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.