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Technical Data Sheet
PartsTable / COMPONENT / 4B8995
4B8995 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, head_height: 0.188 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.469 INCHES MINIMUM IN, fastener_length: 0.562 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-272-5847, 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
4B8995
NSN: 5306-00-272-5847
FSC: 5306
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height0.188 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN
thread_class3A A
thread_length0.469 INCHES MINIMUM IN
fastener_length0.562 INCHES NOMINAL IN
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
width_between_flats0.750 INCHES NOMINAL IN
nominal_thread_diameter0.500 INCHES IN
thread_quantity_per_inch20
thread_series_designatorUNF
NSN5306-00-272-5847
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 4B8995 · 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
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD CLASS: 3A A
•
HEAD HEIGHT: 0.188 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN
•
FEATURES PROVIDED: FINISHED HEAD
•
THREAD LENGTH: 0.469 INCHES MINIMUM IN
•
NOMINAL THREAD DIAMETER: 0.500 INCHES IN
•
THREAD QUANTITY PER INCH: 20
•
WIDTH BETWEEN FLATS: 0.750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
THREAD CLASS3A A
HEAD HEIGHT0.188 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN
FEATURES PROVIDEDFINISHED HEAD
THREAD LENGTH0.469 INCHES MINIMUM IN
NOMINAL THREAD DIAMETER0.500 INCHES IN
THREAD QUANTITY PER INCH20
WIDTH BETWEEN FLATS0.750 INCHES NOMINAL IN
THREAD SERIES DESIGNATORUNF
FASTENER LENGTH0.562 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
28941FInterchangeable
interchangeable cross-reference
interchangeable
1557Interchangeable
interchangeable cross-reference
interchangeable
P11432Interchangeable
interchangeable cross-reference
interchangeable
P16-0125Interchangeable
interchangeable cross-reference
interchangeable
7-755-227000Interchangeable
interchangeable cross-reference
interchangeable
218340Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4B8995?
4B8995 is a BOLT,MACHINE.
What parts can replace 4B8995?
There are 13 known substitutes for 4B8995: 28941F, 1557, P11432 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4B8995?
4B8995 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-272-5847. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026