PartsTable
Technical Data Sheet
Download PDF

1741AS278-51 — SCREW,CAP,HEXAGON HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

1741AS278-51: 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: 0.391 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 1.000 INCHES NOMINAL IN, fastener_length: 1.000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-435-9679, 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
1741AS278-51
NSN: 5305-01-435-9679
FSC: 5305 — Screws
CAGE: 30003 — NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height0.391 INCHES NOMINAL IN
thread_class2A A
thread_length1.000 INCHES NOMINAL IN
fastener_length1.000 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_between_flats0.938 INCHES NOMINAL IN
nominal_thread_diameter0.625 INCHES IN
thread_quantity_per_inch11
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
material_document_and_classificationSAE J429 GR8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5305-01-435-9679
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1741AS278-51 · 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: 0.391 INCHES NOMINAL IN
•
FASTENER LENGTH: 1.000 INCHES NOMINAL IN
•
THREAD LENGTH: 1.000 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE J429 GR8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.625 INCHES IN
•
HEAD STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 0.938 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.391 INCHES NOMINAL IN
FASTENER LENGTH1.000 INCHES NOMINAL IN
THREAD LENGTH1.000 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONSAE J429 GR8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.625 INCHES IN
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.938 INCHES NOMINAL IN
THREAD CLASS2A A
THREAD QUANTITY PER INCH11
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: Insurance item — stocked against contingency demandNo demilitarization required
Ready to buy 1741AS278-51?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 1741AS278-51?
1741AS278-51 is a SCREW,CAP,HEXAGON HEAD.
What is the NSN for 1741AS278-51?
1741AS278-51 is cataloged in the U.S. Government catalog under NSN 5305-01-435-9679. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 1741AS278-51

✓ 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.