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28401 — MODEM,COMMUNICATIONS

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

28401: MODEM,COMMUNICATIONS.

The MODEM,COMMUNICATIONS is a the manufacturer industrial component. Key specifications include material: STEEL BLADE, head_style: HEXAGON, blade_width: 1.25 INCHES NOMINAL IN, head_height: 0.375 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 1.344 INCHES MINIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-110-8764, 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
MRO→ MRO_GENERAL→ 28401
NSN: 5305-00-110-8764
NIINs: 001108764, 008915095, 012592329, 013237629, 016246369, 016520401
FSC: 5305 — Screws
CAGE: 64104 — DRESSER, LLC (USA)
SPECIFICATIONS
materialSTEEL BLADE
head_styleHEXAGON
blade_width1.25 INCHES NOMINAL IN
head_height0.375 INCHES NOMINAL IN
thread_class2A A
thread_length1.344 INCHES MINIMUM IN
screw_materialSTEEL
fastener_length1.500 INCHES NOMINAL IN
special_featuresCHANK COATING: CHROME; DOUBLE EDGE BLADE
thread_directionRIGHT-HAND
ac_voltage_rating220.0 VOLTS NOMINAL LOCATION NOT OTHERWISE SPECIFIED
width_between_flats0.875 INCHES NOMINAL IN
NSN5305-00-110-8764
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 28401 · 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: 0.375 INCHES NOMINAL IN
•
FASTENER LENGTH: 1.500 INCHES NOMINAL IN
•
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: SAE GR 8 ASSN STD SINGLE MATERIAL RESPONSE
•
THREAD LENGTH: 1.344 INCHES MINIMUM IN
•
NOMINAL THREAD DIAMETER: 0.625 INCHES IN
•
HEAD STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 0.875 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.375 INCHES NOMINAL IN
FASTENER LENGTH1.500 INCHES NOMINAL IN
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONSAE GR 8 ASSN STD SINGLE MATERIAL RESPONSE
THREAD LENGTH1.344 INCHES MINIMUM IN
NOMINAL THREAD DIAMETER0.625 INCHES IN
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.875 INCHES NOMINAL IN
SCREW MATERIALSTEEL
INTERNAL DRIVE STYLESLOT
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 28401?
28401 is a MODEM,COMMUNICATIONS. It is classified as a MRO (MRO_GENERAL).
What is the NSN for 28401?
28401 is cataloged in the U.S. Government catalog under NSN 5305-00-110-8764. 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.