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Technical Data Sheet
PartsTable / COMPONENT / SC1785R-3-13
SC1785R-3-13 ✓ 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: 3A A, head_diameter: 0.344 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN, thread_length: 0.314 INCHES MINIMUM AND 0.364 INCHES MAXIMUM IN, screw_material: STEEL COMP E4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 6150, fastener_length: 1.136 INCHES MINIMUM AND 1.166 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 5305-01-193-6809, 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
SC1785R-3-13
NSN: 5305-01-193-6809
FSC: 5305
CAGE: 06950 — HOWMET GLOBAL FASTENING SYSTEMS INC (USA)
SPECIFICATIONS
head_styleFLAT COUNTERSUNK
thread_class3A A
head_diameter0.344 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
thread_length0.314 INCHES MINIMUM AND 0.364 INCHES MAXIMUM IN
screw_materialSTEEL COMP E4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 6150
fastener_length1.136 INCHES MINIMUM AND 1.166 INCHES MAXIMUM IN
hardness_rating36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM
special_featuresINTERNAL DRIVE RIBBED
thread_directionRIGHT-HAND
countersink_angle99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
internal_drive_styleTORQUE SET
nominal_thread_diameter0.190 INCHES IN
NSN5305-01-193-6809
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: SC1785R-3-13 · 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
•
SCREW SURFACE TREATMENT: CADMIUM AND CHROMATE
•
HEAD STYLE: FLAT COUNTERSUNK
•
SCREW MATERIAL: STEEL COMP E4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 6150
•
COUNTERSINK ANGLE: 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
•
HARDNESS RATING: 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM
•
THREAD DIRECTION: RIGHT-HAND
•
INTERNAL DRIVE STYLE: TORQUE SET
TECHNICAL CHARACTERISTICS (FLIS)
SCREW SURFACE TREATMENTCADMIUM AND CHROMATE
HEAD STYLEFLAT COUNTERSUNK
SCREW MATERIALSTEEL COMP E4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 6150
COUNTERSINK ANGLE99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
HARDNESS RATING36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM
THREAD DIRECTIONRIGHT-HAND
SPECIAL FEATURESINTERNAL DRIVE RIBBED
INTERNAL DRIVE STYLETORQUE SET
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF)
FASTENER LENGTH1.136 INCHES MINIMUM AND 1.166 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
18117Interchangeable
interchangeable cross-reference
interchangeable
RTV5040Interchangeable
interchangeable cross-reference
interchangeable
LE111-0032-2313Interchangeable
Same NIIN cross-reference
interchangeable
A032-2313Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SC1785R-3-13?
SC1785R-3-13 is a SCREW,MACHINE.
What parts can replace SC1785R-3-13?
There are 4 known substitutes for SC1785R-3-13: 18117, RTV5040, LE111-0032-2313 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SC1785R-3-13?
SC1785R-3-13 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-193-6809. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026