PartsTable
Technical Data Sheet
PartsTable / COMPONENT / MS51851-68
MS51851-68 ✓ 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: HEXAGON, head_height: 0.105 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN, fastener_length: 0.950 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN, features_provided: CASEHARDENED, surface_treatment: CADMIUM AND CHROMATE OVERALL, width_between_flats: 0.305 INCHES MINIMUM AND 0.312 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 5305-01-105-7187, 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
MS51851-68
NSN: 5305-01-105-7187
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 1018 OR STEEL COMP 1019 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1524 OVERALL
head_styleHEXAGON
head_height0.105 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
fastener_length0.950 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
features_providedCASEHARDENED
surface_treatmentCADMIUM AND CHROMATE OVERALL
width_between_flats0.305 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
internal_drive_styleSLOT
nonmachine_thread_styleTHRU SLOT (TYPE D)
nondefinitive_spec/std_dataD TYPE
nonmachine_nominal_thread_diameter0.190 INCHES IN
surface_treatment_document_and_classificationQQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5305-01-105-7187
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MS51851-68 · 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: SLOT
•
HEAD HEIGHT: 0.105 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
•
NONMACHINE THREAD STYLE: THRU SLOT (TYPE D)
•
NONMACHINE NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
NONDEFINITIVE SPEC/STD DATA: D TYPE
•
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
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
INTERNAL DRIVE STYLESLOT
HEAD HEIGHT0.105 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
NONMACHINE THREAD STYLETHRU SLOT (TYPE D)
NONMACHINE NOMINAL THREAD DIAMETER0.190 INCHES IN
NONDEFINITIVE SPEC/STD DATAD TYPE
MATERIALSTEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1524 OVERALL
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
FEATURES PROVIDEDCASEHARDENED
FASTENER LENGTH0.950 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
127968R91Interchangeable
interchangeable cross-reference
interchangeable
39118Interchangeable
interchangeable cross-reference
interchangeable
SM35723Interchangeable
interchangeable cross-reference
interchangeable
NIACINInterchangeable
interchangeable cross-reference
interchangeable
257111Interchangeable
interchangeable cross-reference
interchangeable
5778Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy MS51851-68?
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 MS51851-68?
MS51851-68 is a SCREW,TAPPING.
What parts can replace MS51851-68?
There are 17 known substitutes for MS51851-68: 127968R91, 39118, SM35723 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS51851-68?
MS51851-68 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-105-7187. 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 — MS51851-68

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