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Technical Data Sheet
PartsTable / COMPONENT / MS51959-28B
MS51959-28B ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FLAT COUNTERSUNK, thread_class: 2A A, head_diameter: 0.244 INCHES MINIMUM AND 0.279 INCHES MAXIMUM IN, thread_length: 0.199 INCHES MINIMUM AND 0.292 INCHES MAXIMUM IN, screw_material: STEEL CORROSION RESISTING OR STEEL, fastener_length: 0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-455-2550, 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
MS51959-28B
NSN: 5305-00-455-2550
FSC: 5305
CAGE: AP250 — O&S AVIATION SRL (ITA)
SPECIFICATIONS
head_styleFLAT COUNTERSUNK
thread_class2A A
head_diameter0.244 INCHES MINIMUM AND 0.279 INCHES MAXIMUM IN
thread_length0.199 INCHES MINIMUM AND 0.292 INCHES MAXIMUM IN
screw_materialSTEEL CORROSION RESISTING OR STEEL
fastener_length0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
countersink_angle80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
internal_drive_styleCROSS RECESS TYPE 1
end_item_identificationA4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE
nominal_thread_diameter0.138 INCHES IN
screw_surface_treatmentOXIDE
NSN5305-00-455-2550
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MS51959-28B · 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 DIAMETER: 0.244 INCHES MINIMUM AND 0.279 INCHES MAXIMUM IN
•
DEPARTURE FROM CITED DESIGNATOR: AS MODIFIED BY FINISH
•
NONDEFINITIVE SPEC/STD DATA: 3 TYPE AND 2C STYLE
•
THREAD QUANTITY PER INCH: 32
•
COUNTERSINK ANGLE: 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
•
SCREW MATERIAL: STEEL CORROSION RESISTING OR STEEL
•
SCREW SURFACE TREATMENT: OXIDE
TECHNICAL CHARACTERISTICS (FLIS)
HEAD DIAMETER0.244 INCHES MINIMUM AND 0.279 INCHES MAXIMUM IN
DEPARTURE FROM CITED DESIGNATORAS MODIFIED BY FINISH
NONDEFINITIVE SPEC/STD DATA3 TYPE AND 2C STYLE
THREAD QUANTITY PER INCH32
COUNTERSINK ANGLE80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
SCREW MATERIALSTEEL CORROSION RESISTING OR STEEL
SCREW SURFACE TREATMENTOXIDE
END ITEM IDENTIFICATIONA4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE
NOMINAL THREAD DIAMETER0.138 INCHES IN
MINIMUM TENSILE STRENGTH80000 POUNDS PER SQUARE INCH LBS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
1361269-129Interchangeable
interchangeable cross-reference
interchangeable
100037-5Interchangeable
interchangeable cross-reference
interchangeable
418198-28Interchangeable
interchangeable cross-reference
interchangeable
10241-28Interchangeable
Same NIIN cross-reference
interchangeable
5305PL1573655Interchangeable
Same NIIN cross-reference
interchangeable
FFS92Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51959-28B?
MS51959-28B is a SCREW,MACHINE.
What parts can replace MS51959-28B?
There are 9 known substitutes for MS51959-28B: 1361269-129, 100037-5, 418198-28 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS51959-28B?
MS51959-28B is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-455-2550. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026