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5J4771 — BOLT,SQUARE NECK

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

5J4771: BOLT,SQUARE NECK.

The BOLT,SQUARE NECK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: FILLISTER, thread_class: 2A A, thread_length: 1.750 INCHES NOMINAL IN, fastener_length: 2.750 INCHES NOMINAL IN, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-164-0784, 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
5J4771
NSN: 5306-00-164-0784
FSC: 5306 — Bolts
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleFILLISTER
thread_class2A A
thread_length1.750 INCHES NOMINAL IN
fastener_length2.750 INCHES NOMINAL IN
thread_directionRIGHT-HAND
nominal_thread_diameter0.750 INCHES IN
minimum_tensile_strength150000 POUNDS PER SQUARE INCH LBS
thread_quantity_per_inch10
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5306-00-164-0784
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 5J4771 · 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
•
FASTENER LENGTH: 2.750 INCHES NOMINAL IN
•
THREAD LENGTH: 1.750 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.750 INCHES IN
•
HEAD STYLE: FILLISTER
•
THREAD DIRECTION: RIGHT-HAND
•
MINIMUM TENSILE STRENGTH: 150000 POUNDS PER SQUARE INCH LBS
•
THREAD CLASS: 2A A
•
THREAD QUANTITY PER INCH: 10
TECHNICAL CHARACTERISTICS
FASTENER LENGTH2.750 INCHES NOMINAL IN
THREAD LENGTH1.750 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.750 INCHES IN
HEAD STYLEFILLISTER
THREAD DIRECTIONRIGHT-HAND
MINIMUM TENSILE STRENGTH150000 POUNDS PER SQUARE INCH LBS
THREAD CLASS2A A
THREAD QUANTITY PER INCH10
MATERIALSTEEL OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
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 1
IPD5J4771Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 5J4771?
5J4771 is a BOLT,SQUARE NECK.
What parts can replace 5J4771?
There is 1 known substitute for 5J4771: IPD5J4771. Substitute compatibility should be verified for your specific system.
What is the NSN for 5J4771?
5J4771 is cataloged in the U.S. Government catalog under NSN 5306-00-164-0784. 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.