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561-01-3279 — SCREW,CAP,HEXAGON HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

561-01-3279: SCREW,CAP,HEXAGON HEAD.

The SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include head_style: HEXAGON, thread_class: 2A A, fastener_length: 1.750 INCHES NOMINAL IN, thread_direction: RIGHT-HAND, nominal_thread_diameter: 0.875 INCHES IN, thread_series_designator: UNIFIED NATIONAL COARSE (UNC). This part is cataloged in the U.S.

Government catalog under NSN 5305-01-280-9366, 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
561-01-3279
NSN: 5305-01-280-9366
FSC: 5305 — Screws
CAGE: 35683 — INTEGRATED DISTRIBUTION SYSTEMSLIMITED PARTNERSHIPDBA WATEROUS POWER SYSTEMS (CAN)
SPECIFICATIONS
head_styleHEXAGON
thread_class2A A
fastener_length1.750 INCHES NOMINAL IN
thread_directionRIGHT-HAND
nominal_thread_diameter0.875 INCHES IN
thread_quantity_per_inch9
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5305-01-280-9366
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 561-01-3279 · 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: 0.875 INCHES IN
•
HEAD STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD CLASS: 2A A
•
THREAD QUANTITY PER INCH: 9
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
TECHNICAL CHARACTERISTICS
FASTENER LENGTH1.750 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.875 INCHES IN
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
THREAD CLASS2A A
THREAD QUANTITY PER INCH9
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 561-01-3279?
561-01-3279 is a SCREW,CAP,HEXAGON HEAD.
What is the NSN for 561-01-3279?
561-01-3279 is cataloged in the U.S. Government catalog under NSN 5305-01-280-9366. 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.