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PartsTable / COMPONENT / S100C3-647
S100C3-647 ✓ 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,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4037 OR STEEL COMP 8740 OVERALL, head_style: FLAT COUNTERSUNK, thread_class: 2A A, head_diameter: 0.276 INCHES NOMINAL IN, thread_length: 0.291 INCHES MINIMUM AND 0.351 INCHES MAXIMUM IN, shoulder_shape: ROUND FIRST SHOULDER. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-250-2144, 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
S100C3-647
NSN: 5305-00-250-2144
FSC: 5305
CAGE: 28972 — FASTENER ENGINEERING CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 4037 OR STEEL COMP 8740 OVERALL
head_styleFLAT COUNTERSUNK
thread_class2A A
head_diameter0.276 INCHES NOMINAL IN
thread_length0.291 INCHES MINIMUM AND 0.351 INCHES MAXIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length0.891 INCHES MINIMUM AND 0.921 INCHES MAXIMUM IN
shoulder_length0.530 INCHES MINIMUM AND 0.560 INCHES MAXIMUM FIRST SHOULDER IN
special_featuresTOP OF HEAD RED
thread_directionRIGHT-HAND
countersink_angle100.0 DEGREES NOMINAL
shoulder_diameter0.193 INCHES MINIMUM AND 0.195 INCHES MAXIMUM FIRST SHOULDER IN
NSN5305-00-250-2144
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: S100C3-647 · 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
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
•
HEAD DIAMETER: 0.276 INCHES NOMINAL IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
THREAD QUANTITY PER INCH: 32
•
SHOULDER DIAMETER: 0.193 INCHES MINIMUM AND 0.195 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD SERIES DESIGNATOR: UNF
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
HEAD DIAMETER0.276 INCHES NOMINAL IN
SHOULDER SHAPEROUND FIRST SHOULDER
THREAD QUANTITY PER INCH32
SHOULDER DIAMETER0.193 INCHES MINIMUM AND 0.195 INCHES MAXIMUM FIRST SHOULDER IN
THREAD SERIES DESIGNATORUNF
SURFACE TREATMENTPAINT TOP OF HEAD
NOMINAL THREAD DIAMETER0.190 INCHES IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HEAD STYLEFLAT COUNTERSUNK
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
6084791-1Interchangeable
interchangeable cross-reference
interchangeable
B-199074Interchangeable
interchangeable cross-reference
interchangeable
199074-SPInterchangeable
interchangeable cross-reference
interchangeable
GS551C3-647Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is S100C3-647?
S100C3-647 is a SCREW,SHOULDER.
What parts can replace S100C3-647?
There are 4 known substitutes for S100C3-647: 6084791-1, B-199074, 199074-SP and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for S100C3-647?
S100C3-647 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-250-2144. 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