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0S1571 — SCREW,CAP,HEXAGON HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

0S1571: SCREW,CAP,HEXAGON HEAD.

The SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, head_height: 1.054 INCHES MINIMUM AND 1.134 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 0.750 INCHES NOMINAL IN, fastener_length: 1.750 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-026-9518, 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
0S1571
NSN: 5305-01-026-9518
FSC: 5305 — Screws
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height1.054 INCHES MINIMUM AND 1.134 INCHES MAXIMUM IN
thread_class2A A
thread_length0.750 INCHES NOMINAL IN
fastener_length1.750 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_between_flats2.538 INCHES MINIMUM AND 2.625 INCHES MAXIMUM IN
end_item_identificationLOGISTICS SUPPORT VESSEL
nominal_thread_diameter0.375 INCHES IN
thread_quantity_per_inch16
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5305-01-026-9518
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 0S1571 · 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: 1.054 INCHES MINIMUM AND 1.134 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.750 INCHES NOMINAL IN
•
THREAD LENGTH: 0.750 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE GRADE 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
HEAD STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 2.538 INCHES MINIMUM AND 2.625 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT1.054 INCHES MINIMUM AND 1.134 INCHES MAXIMUM IN
FASTENER LENGTH1.750 INCHES NOMINAL IN
THREAD LENGTH0.750 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONSAE GRADE 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.375 INCHES IN
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS2.538 INCHES MINIMUM AND 2.625 INCHES MAXIMUM IN
THREAD CLASS2A A
END ITEM IDENTIFICATIONLOGISTICS SUPPORT VESSEL
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-001-5016 5305-00-001-9160 5305-00-001-9629 5305-00-001-9742 5305-00-001-9768 5305-00-003-4306 5305-00-003-6694 5305-00-003-6753
SUBSTITUTES & CROSS-REFERENCES 2
OS1571Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
2HA732Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 0S1571?
0S1571 is a SCREW,CAP,HEXAGON HEAD.
What parts can replace 0S1571?
There are 2 known substitutes for 0S1571: OS1571, 2HA732. Substitute compatibility should be verified for your specific system.
What is the NSN for 0S1571?
0S1571 is cataloged in the U.S. Government catalog under NSN 5305-01-026-9518. 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.