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Technical Data Sheet
PartsTable / COMPONENT / SCB312-12
SCB312-12 ✓ 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 303 OVERALL, head_style: FLAT CHAMFER, head_height: 0.156 INCHES NOMINAL IN, thread_class: 2A A, head_diameter: 0.312 INCHES NOMINAL IN, thread_length: 0.188 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-064-5479, 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
SCB312-12
NSN: 5305-01-064-5479
FSC: 5305
CAGE: 04729 — UNICORP. (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
head_styleFLAT CHAMFER
head_height0.156 INCHES NOMINAL IN
thread_class2A A
head_diameter0.312 INCHES NOMINAL IN
thread_length0.188 INCHES NOMINAL IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length0.314 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN
shoulder_length0.126 INCHES MINIMUM AND 0.128 INCHES MAXIMUM FIRST SHOULDER IN
thread_directionRIGHT-HAND
shoulder_diameter0.186 INCHES MINIMUM AND 0.187 INCHES MAXIMUM FIRST SHOULDER IN
width_across_flats0.094 INCHES NOMINAL IN
NSN5305-01-064-5479
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: SCB312-12 · 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
•
THREAD LENGTH: 0.188 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD QUANTITY PER INCH: 32
•
MATERIAL: STEEL COMP 303 OVERALL
•
WIDTH ACROSS FLATS: 0.094 INCHES NOMINAL IN
•
THREAD CLASS: 2A A
•
FASTENER LENGTH: 0.314 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.156 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD LENGTH0.188 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH32
MATERIALSTEEL COMP 303 OVERALL
WIDTH ACROSS FLATS0.094 INCHES NOMINAL IN
THREAD CLASS2A A
FASTENER LENGTH0.314 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN
HEAD HEIGHT0.156 INCHES NOMINAL IN
SHOULDER LENGTH0.126 INCHES MINIMUM AND 0.128 INCHES MAXIMUM FIRST SHOULDER IN
HEAD DIAMETER0.312 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
4415Interchangeable
interchangeable cross-reference
interchangeable
441-205Interchangeable
interchangeable cross-reference
interchangeable
2291Interchangeable
interchangeable cross-reference
interchangeable
MIL-PRF-7908Interchangeable
interchangeable cross-reference
interchangeable
11370Interchangeable
interchangeable cross-reference
interchangeable
32743Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SCB312-12?
SCB312-12 is a SCREW,SHOULDER.
What parts can replace SCB312-12?
There are 21 known substitutes for SCB312-12: 4415, 441-205, 2291 and 18 more. Substitute compatibility should be verified for your specific system.
Is SCB312-12 still available?
SCB312-12 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