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Technical Data Sheet
PartsTable / COMPONENT / MS51861-15
MS51861-15 ✓ 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 material: STEEL OVERALL, head_style: PAN, head_height: 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN, head_diameter: 0.205 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN, fastener_length: 0.469 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN, features_provided: CASEHARDENED. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-053-1114, 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
MS51861-15
NSN: 5305-00-053-1114
FSC: 5305
CAGE: 80205 — NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_stylePAN
head_height0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
head_diameter0.205 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN
fastener_length0.469 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
features_providedCASEHARDENED
surface_treatmentCADMIUM OVERALL
internal_drive_styleCROSS RECESS TYPE 1
nonmachine_thread_styleGIMLET POINT (TYPE A, AB OR BA)
nondefinitive_spec/std_dataAB TYPE
nonmachine_nominal_thread_diameter0.112 INCHES IN
surface_treatment_document_and_classificationQQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5305-00-053-1114
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MS51861-15 · 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: 0.469 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AISI ASSN STD ALL MATERIAL RESPONSES OVERALL
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
•
NONMACHINE NOMINAL THREAD DIAMETER: 0.112 INCHES IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 TY 2 CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
•
MATERIAL: STEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1524 OVERALL
•
FEATURES PROVIDED: CASEHARDENED
•
HEAD DIAMETER: 0.205 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
FASTENER LENGTH0.469 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONAISI ASSN STD ALL MATERIAL RESPONSES OVERALL
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
NONMACHINE NOMINAL THREAD DIAMETER0.112 INCHES IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 TY 2 CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
MATERIALSTEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1524 OVERALL
FEATURES PROVIDEDCASEHARDENED
HEAD DIAMETER0.205 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN
HEAD STYLEPAN
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
MS51861-15Interchangeable
interchangeable cross-reference
interchangeable
PC8-0139-16Interchangeable
interchangeable cross-reference
interchangeable
FFS107Interchangeable
interchangeable cross-reference
interchangeable
MS24621-11Interchangeable
Same NIIN cross-reference
interchangeable
B4525-300-58Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51861-15?
MS51861-15 is a SCREW,TAPPING.
What parts can replace MS51861-15?
There are 5 known substitutes for MS51861-15: MS51861-15, PC8-0139-16, FFS107 and 2 more. Substitute compatibility should be verified for your specific system.
Is MS51861-15 still available?
MS51861-15 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