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PartsTable / COMPONENT / 18257-001
18257-001 ✓ 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 SCREW,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, head_height: 0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 0.344 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN, surface_finish: 63.0 MICROINCHES THREADS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-071-2506, 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
18257-001
NSN: 5305-00-071-2506
FSC: 5305
CAGE: 21439 — CURTISS-WRIGHT FLOW CONTROL SERVICE, LLC DBA ENGINEERED ARRESTING SYSTEMS - ESCO DIV CW FLOW CONTROL SVC LLC DBA (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN
thread_class2A A
thread_length0.344 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
surface_finish63.0 MICROINCHES THREADS
fastener_length0.469 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
surface_treatmentZINC AND CHROMATE OVERALL
width_between_flats0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
end_item_identificationLOGISTICS SUPPORT VESSEL (LSV)
nominal_thread_diameter0.250 INCHES IN
NSN5305-00-071-2506
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 18257-001 · 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: 0.469 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
•
THREAD CLASS: 2A A
•
THREAD QUANTITY PER INCH: 20
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
MINIMUM TENSILE STRENGTH: 150000 POUNDS PER SQUARE INCH LBS
•
MATERIAL: STEEL OVERALL
•
SURFACE FINISH: 63.0 MICROINCHES THREADS
TECHNICAL CHARACTERISTICS (FLIS)
FASTENER LENGTH0.469 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
THREAD CLASS2A A
THREAD QUANTITY PER INCH20
NOMINAL THREAD DIAMETER0.250 INCHES IN
MINIMUM TENSILE STRENGTH150000 POUNDS PER SQUARE INCH LBS
END ITEM IDENTIFICATIONLOGISTICS SUPPORT VESSEL (LSV)
MATERIALSTEEL OVERALL
SURFACE FINISH63.0 MICROINCHES THREADS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM B633 TY 2 SC 3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
WIDTH BETWEEN FLATS0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
120706Interchangeable
interchangeable cross-reference
interchangeable
P644Interchangeable
interchangeable cross-reference
interchangeable
FFS85TYPE2STYLE10PInterchangeable
interchangeable cross-reference
interchangeable
01-91180-8-9Interchangeable
interchangeable cross-reference
interchangeable
30383-9Interchangeable
interchangeable cross-reference
interchangeable
MS25041-8Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 18257-001?
18257-001 is a SCREW,MACHINE.
What parts can replace 18257-001?
There are 25 known substitutes for 18257-001: 120706, P644, FFS85TYPE2STYLE10P and 22 more. Substitute compatibility should be verified for your specific system.
Is 18257-001 still available?
18257-001 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026