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523856 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

523856: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include head_style: DOUBLE HEXAGON EXTENDED WASHER, thread_class: 2A A, fastener_length: 1.750 INCHES NOMINAL IN, nominal_thread_diameter: 0.375 INCHES IN, thread_quantity_per_inch: 24, thread_series_designator: UNF. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-148-6927, 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
523856
NSN: 5306-01-148-6927
FSC: 5306 — Bolts
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
head_styleDOUBLE HEXAGON EXTENDED WASHER
thread_class2A A
fastener_length1.750 INCHES NOMINAL IN
end_item_identificationVIBRATION PICKUP BRACKET ON PRATT AND WHITNEY GAS TURBINES MODELS FT4A-2 AND FT4A-12 ONBOARD 378 AND 400 FOOT COAST GUARD VESSELS FT
nominal_thread_diameter0.375 INCHES IN
thread_quantity_per_inch24
thread_series_designatorUNF
NSN5306-01-148-6927
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 523856 · 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: 1.750 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
HEAD STYLE: DOUBLE HEXAGON EXTENDED WASHER
•
THREAD CLASS: 2A A
•
THREAD QUANTITY PER INCH: 24
•
THREAD SERIES DESIGNATOR: UNF
TECHNICAL CHARACTERISTICS
FASTENER LENGTH1.750 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.375 INCHES IN
HEAD STYLEDOUBLE HEXAGON EXTENDED WASHER
THREAD CLASS2A A
END ITEM IDENTIFICATIONVIBRATION PICKUP BRACKET ON PRATT AND WHITNEY GAS TURBINES MODELS FT4A-2 AND FT4A-12 ONBOARD 378 AND 400 FOOT COAST GUARD VESSELS FT
THREAD QUANTITY PER INCH24
THREAD SERIES DESIGNATORUNF
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
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 523856?
523856 is a BOLT,MACHINE.
What is the NSN for 523856?
523856 is cataloged in the U.S. Government catalog under NSN 5306-01-148-6927. 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.