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801-6508779-28 — SCREW,CAP,SOCKET HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

801-6508779-28: SCREW,CAP,SOCKET HEAD.

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY K-500 OVERALL, head_style: FLAT FILLISTER, head_height: 0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 1.107 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN, thread_length: 2.250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-421-2033, 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
801-6508779-28
NSN: 5305-01-421-2033
FSC: 5305 — Screws
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialNICKEL ALLOY K-500 OVERALL
head_styleFLAT FILLISTER
head_height0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
thread_class3A A
head_diameter1.107 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
thread_length2.250 INCHES NOMINAL IN
fastener_length2.250 INCHES NOMINAL IN
locking_featurePATCH OR PELLET OR STRIP THREADS
thread_directionRIGHT-HAND
width_across_flats0.625 INCHES NOMINAL IN
internal_drive_styleHEXAGON
nominal_thread_diameter0.750 INCHES IN
NSN5305-01-421-2033
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 801-6508779-28 · 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
•
WIDTH ACROSS FLATS: 0.625 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
•
FASTENER LENGTH: 2.250 INCHES NOMINAL IN
•
THREAD LENGTH: 2.250 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.750 INCHES IN
•
HEAD STYLE: FLAT FILLISTER
•
THREAD DIRECTION: RIGHT-HAND
•
LOCKING FEATURE: PATCH OR PELLET OR STRIP THREADS
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.625 INCHES NOMINAL IN
HEAD HEIGHT0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
FASTENER LENGTH2.250 INCHES NOMINAL IN
THREAD LENGTH2.250 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.750 INCHES IN
HEAD STYLEFLAT FILLISTER
THREAD DIRECTIONRIGHT-HAND
LOCKING FEATUREPATCH OR PELLET OR STRIP THREADS
INTERNAL DRIVE STYLEHEXAGON
THREAD CLASS3A A
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831
SUBSTITUTES & CROSS-REFERENCES 7
0.750-10UNRC-3AX2.250L STEELReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
751-640232 FIND 63Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
751-6402301 ITEM 63Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
581-6726890-47Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
801-6408775-25Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
801-6408779-28Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
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 801-6508779-28?
801-6508779-28 is a SCREW,CAP,SOCKET HEAD.
What parts can replace 801-6508779-28?
There are 7 known substitutes for 801-6508779-28: 0.750-10UNRC-3AX2.250L STEEL, 751-640232 FIND 63, 751-6402301 ITEM 63 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 801-6508779-28?
801-6508779-28 is cataloged in the U.S. Government catalog under NSN 5305-01-421-2033. 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.