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PartsTable / COMPONENT / MS51963-83 5/16 -18UNC-3AX3/8 L
MS51963-83 5/16 -18UNC-3AX3/8 L ✓ 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 MS51963-83 5/16 -18UNC-3AX3/8 L is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-724-5898, 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
MS51963-83 5/16 -18UNC-3AX3/8 L
NSN: 5305-00-724-5898
FSC: 5305
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
Part NumberMS51963-83 5/16 -18UNC-3AX3/8 L
NSN5305-00-724-5898
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MS51963-83 5/16 -18UNC-3AX3/8 L · 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: 0.375 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
INTERNAL DRIVE STYLE: HEXAGON
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
•
THREAD LENGTH: 0.375 INCHES MAXIMUM IN
•
THREAD QUANTITY PER INCH: 18
•
MATERIAL: STEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 8630 OR STEEL COMP 8740 OVERALL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
TECHNICAL CHARACTERISTICS (FLIS)
FASTENER LENGTH0.375 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
INTERNAL DRIVE STYLEHEXAGON
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
THREAD LENGTH0.375 INCHES MAXIMUM IN
THREAD QUANTITY PER INCH18
MATERIALSTEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 8630 OR STEEL COMP 8740 OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
POINT STYLECUP
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
5K19103Interchangeable
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SK19101SIZE3618Interchangeable
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1184F1PC90Interchangeable
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MX242266-3Interchangeable
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MX242268PC84T091Interchangeable
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MX242268PC84T91Interchangeable
interchangeable cross-reference
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LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51963-83 5/16 -18UNC-3AX3/8 L?
MS51963-83 5/16 -18UNC-3AX3/8 L is a MS51963-83 5/16 -18UNC-3AX3/8 L.
What parts can replace MS51963-83 5/16 -18UNC-3AX3/8 L?
There are 20 known substitutes for MS51963-83 5/16 -18UNC-3AX3/8 L: 5K19103, SK19101SIZE3618, 1184F1PC90 and 17 more. Substitute compatibility should be verified for your specific system.
Is MS51963-83 5/16 -18UNC-3AX3/8 L still available?
MS51963-83 5/16 -18UNC-3AX3/8 L 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