PartsTable
Technical Data Sheet
Download PDF

3660890 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

3660890: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: HEXAGON, head_height: 0.280 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 0.750 INCHES NOMINAL IN, screw_material: STEEL, fastener_length: 2.250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-570-7442, 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
3660890
NSN: 5305-01-570-7442
FSC: 5305 — Screws
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
head_styleHEXAGON
head_height0.280 INCHES NOMINAL IN
thread_class2A A
thread_length0.750 INCHES NOMINAL IN
screw_materialSTEEL
fastener_length2.250 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_between_flats0.367 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
end_item_identification2320-01-544-2251; PALLETIZED LOADING SYSTEM (PLS) M1074 M1075 M1076 M1077
nominal_thread_diameter0.250 INCHES IN
thread_quantity_per_inch20
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5305-01-570-7442
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3660890 · 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: 0.280 INCHES NOMINAL IN
•
FASTENER LENGTH: 2.250 INCHES NOMINAL IN
•
THREAD LENGTH: 0.750 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
HEAD STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 0.367 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
•
SCREW MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.280 INCHES NOMINAL IN
FASTENER LENGTH2.250 INCHES NOMINAL IN
THREAD LENGTH0.750 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.367 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
SCREW MATERIALSTEEL
PART NAME ASSIGNED BY CONTROLLING AGENCYSCR, FLG, HEX, .25X20X2.25 G5 ZY
THREAD CLASS2A A
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
Ready to buy 3660890?
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 3660890?
3660890 is a SCREW,MACHINE.
What is the NSN for 3660890?
3660890 is cataloged in the U.S. Government catalog under NSN 5305-01-570-7442. 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 — 3660890

✓ 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.