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Technical Data Sheet
PartsTable / COMPONENT / MS51861-45
MS51861-45 ✓ 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,TAPPING is a the manufacturer industrial component. Key specifications include head_style: PAN, head_height: 0.122 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN, head_diameter: 0.357 INCHES MINIMUM AND 0.373 INCHES MAXIMUM IN, fastener_length: 0.469 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN, features_provided: CASEHARDENED, surface_treatment: ZINC AND CHROMATE OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-432-4201, 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
MS51861-45
NSN: 5305-00-432-4201
FSC: 5305
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1023 OR STEEL COMP 1524 OVERALL
head_stylePAN
head_height0.122 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN
head_diameter0.357 INCHES MINIMUM AND 0.373 INCHES MAXIMUM IN
fastener_length0.469 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
features_providedCASEHARDENED
surface_treatmentZINC AND CHROMATE OVERALL
internal_drive_styleCROSS RECESS TYPE 1
nonmachine_thread_styleGIMLET POINT (TYPE A, AB OR BA)
nondefinitive_spec/std_dataAB TYPE
departure_from_cited_documentAS DIFFERENTIATED BY SURFACE
nonmachine_nominal_thread_diameter0.190 INCHES IN
NSN5305-00-432-4201
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MS51861-45 · 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
•
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
•
NONMACHINE NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
MATERIAL: STEEL OVERALL
•
HEAD DIAMETER: 0.357 INCHES MINIMUM AND 0.373 INCHES MAXIMUM IN
•
NONMACHINE THREAD STYLE: GIMLET POINT (TYPE A, AB OR BA)
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
NONDEFINITIVE SPEC/STD DATA: AB TYPE
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
NONMACHINE NOMINAL THREAD DIAMETER0.190 INCHES IN
MATERIALSTEEL OVERALL
HEAD DIAMETER0.357 INCHES MINIMUM AND 0.373 INCHES MAXIMUM IN
NONMACHINE THREAD STYLEGIMLET POINT (TYPE A, AB OR BA)
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NONDEFINITIVE SPEC/STD DATAAB TYPE
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
FASTENER LENGTH0.469 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
HEAD HEIGHT0.122 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
80060Interchangeable
interchangeable cross-reference
interchangeable
PARKERKAL0N10-1-2PK64A10-8Interchangeable
interchangeable cross-reference
interchangeable
B18.6.4Interchangeable
interchangeable cross-reference
interchangeable
MS51861-45Interchangeable
interchangeable cross-reference
interchangeable
9419328Interchangeable
Same NIIN cross-reference
interchangeable
5305PL0840859Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51861-45?
MS51861-45 is a SCREW,TAPPING.
What parts can replace MS51861-45?
There are 11 known substitutes for MS51861-45: 80060, PARKERKAL0N10-1-2PK64A10-8, B18.6.4 and 8 more. Substitute compatibility should be verified for your specific system.
Is MS51861-45 still available?
MS51861-45 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