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Technical Data Sheet
PartsTable / COMPONENT / MS51959-51
MS51959-51 ✓ 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: 0.292 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN, thread_length: 1.438 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN, screw_material: STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316, fastener_length: 1.500 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-764-0076, 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
MS51959-51
NSN: 5305-00-764-0076
FSC: 5305
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
head_styleFLAT COUNTERSUNK
thread_class2A A
head_diameter0.292 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN
thread_length1.438 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
screw_materialSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316
fastener_length1.500 INCHES NOMINAL IN
thread_directionRIGHT-HAND
countersink_angle80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
internal_drive_styleCROSS RECESS TYPE 1
nominal_thread_diameter0.164 INCHES IN
screw_surface_treatmentPASSIVATE
minimum_tensile_strength80000 POUNDS PER SQUARE INCH LBS
NSN5305-00-764-0076
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MS51959-51 · 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
•
FASTENER LENGTH: 1.500 INCHES NOMINAL IN
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
THREAD QUANTITY PER INCH: 32
•
THREAD LENGTH: 1.438 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
•
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
•
SCREW SURFACE TREATMENT: PASSIVATE
•
MINIMUM TENSILE STRENGTH: 80000 POUNDS PER SQUARE INCH LBS
•
NOMINAL THREAD DIAMETER: 0.164 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
FASTENER LENGTH1.500 INCHES NOMINAL IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH32
THREAD LENGTH1.438 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
SCREW SURFACE TREATMENTPASSIVATE
MINIMUM TENSILE STRENGTH80000 POUNDS PER SQUARE INCH LBS
NOMINAL THREAD DIAMETER0.164 INCHES IN
SCREW MATERIALSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316
HEAD DIAMETER0.292 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
22273Interchangeable
interchangeable cross-reference
interchangeable
30442Interchangeable
interchangeable cross-reference
interchangeable
AMS-QQ-A-200/11Interchangeable
interchangeable cross-reference
interchangeable
22273ADXInterchangeable
Same NIIN cross-reference
interchangeable
8929207-27Interchangeable
Same NIIN cross-reference
interchangeable
342-0087-000Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51959-51?
MS51959-51 is a SCREW,MACHINE.
What parts can replace MS51959-51?
There are 7 known substitutes for MS51959-51: 22273, 30442, AMS-QQ-A-200/11 and 4 more. Substitute compatibility should be verified for your specific system.
Is MS51959-51 still available?
MS51959-51 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026