PartsTable
Technical Data Sheet
PartsTable / COMPONENT / MS51959-81S316
MS51959-81S316 ✓ 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: 0.452 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN, thread_length: 0.497 INCHES NOMINAL IN, screw_material: STEEL COMP 316, fastener_length: 0.719 INCHES MINIMUM AND 0.750 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 5305-01-424-3572, 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
MS51959-81S316
NSN: 5305-01-424-3572
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_diameter0.452 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN
thread_length0.497 INCHES NOMINAL IN
screw_materialSTEEL COMP 316
fastener_length0.719 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
special_featuresCRES COMP 316 ONLY
thread_directionLEFT-HAND
countersink_angle80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
internal_drive_styleCROSS RECESS TYPE 1
end_item_identificationMRAP - COUGAR
nominal_thread_diameter0.250 INCHES IN
NSN5305-01-424-3572
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MS51959-81S316 · 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: 0.452 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN
•
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
•
FASTENER LENGTH: 0.719 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
•
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OR FF-S-86 FED STD SINGLE MATERIAL RESPONSE
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
COUNTERSINK ANGLE: 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
•
SCREW SURFACE TREATMENT: PASSIVATE
•
SCREW MATERIAL: STEEL COMP 316
TECHNICAL CHARACTERISTICS (FLIS)
HEAD DIAMETER0.452 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
FASTENER LENGTH0.719 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OR FF-S-86 FED STD SINGLE MATERIAL RESPONSE
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
COUNTERSINK ANGLE80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
SCREW SURFACE TREATMENTPASSIVATE
SCREW MATERIALSTEEL COMP 316
THREAD QUANTITY PER INCH20
SPECIAL FEATURESCRES COMP 316 ONLY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
5000 416605Interchangeable
interchangeable cross-reference
interchangeable
22308Interchangeable
interchangeable cross-reference
interchangeable
MS51959-81Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy MS51959-81S316?
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 MS51959-81S316?
MS51959-81S316 is a SCREW,MACHINE.
What parts can replace MS51959-81S316?
There are 3 known substitutes for MS51959-81S316: 5000 416605, 22308, MS51959-81. Substitute compatibility should be verified for your specific system.
What is the NSN for MS51959-81S316?
MS51959-81S316 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-424-3572. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — MS51959-81S316

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026