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MBEU-66557 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

MBEU-66557: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FLAT COUNTERSUNK, thread_class: 3A A, head_diameter: 0.359 INCHES MAXIMUM IN, thread_length: 0.200 INCHES NOMINAL IN, screw_material: STEEL CORROSION RESISTING, fastener_length: 0.312 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-129-3327, 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
MBEU-66557
NSN: 5305-01-129-3327
FSC: 5305 — Screws
CAGE: U1604 — MARTIN-BAKER AIRCRAFT COMPANY LIMITED (GBR)
SPECIFICATIONS
head_styleFLAT COUNTERSUNK
thread_class3A A
head_diameter0.359 INCHES MAXIMUM IN
thread_length0.200 INCHES NOMINAL IN
screw_materialSTEEL CORROSION RESISTING
fastener_length0.312 INCHES NOMINAL IN
thread_directionRIGHT-HAND
countersink_angle82.0 DEGREES NOMINAL
askewed_head_angle90.0 DEGREES NOMINAL
nominal_thread_diameter0.164 INCHES IN
screw_surface_treatmentPASSIVATE
minimum_tensile_strength1120 POUNDS PER SQUARE INCH LBS
NSN5305-01-129-3327
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MBEU-66557 · 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
•
SCREW SURFACE TREATMENT: PASSIVATE
•
FASTENER LENGTH: 0.312 INCHES NOMINAL IN
•
THREAD LENGTH: 0.200 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.164 INCHES IN
•
HEAD STYLE: FLAT COUNTERSUNK
•
THREAD DIRECTION: RIGHT-HAND
•
SCREW MATERIAL: STEEL CORROSION RESISTING
•
ASKEWED HEAD ANGLE: 90.0 DEGREES NOMINAL
TECHNICAL CHARACTERISTICS
SCREW SURFACE TREATMENTPASSIVATE
FASTENER LENGTH0.312 INCHES NOMINAL IN
THREAD LENGTH0.200 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.164 INCHES IN
HEAD STYLEFLAT COUNTERSUNK
THREAD DIRECTIONRIGHT-HAND
SCREW MATERIALSTEEL CORROSION RESISTING
ASKEWED HEAD ANGLE90.0 DEGREES NOMINAL
MINIMUM TENSILE STRENGTH1120 POUNDS PER SQUARE INCH LBS
COUNTERSINK ANGLE82.0 DEGREES NOMINAL
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

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 MBEU-66557?
MBEU-66557 is a SCREW,MACHINE.
What is the NSN for MBEU-66557?
MBEU-66557 is cataloged in the U.S. Government catalog under NSN 5305-01-129-3327. 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.