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39031-98C-12B — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

39031-98C-12B: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: BUTTON, head_height: 0.077 INCHES MINIMUM AND 0.087 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.298 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN, thread_length: 0.688 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN, screw_material: STEEL CORROSION RESISTING. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-374-4828, 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
39031-98C-12B
NSN: 5305-01-374-4828
FSC: 5305 — Screws
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)
SPECIFICATIONS
head_styleBUTTON
head_height0.077 INCHES MINIMUM AND 0.087 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.298 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
thread_length0.688 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
screw_materialSTEEL CORROSION RESISTING
fastener_length0.750 INCHES NOMINAL IN
hardness_rating36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND
width_between_flats0.094 INCHES NOMINAL IN
nominal_thread_diameter0.164 INCHES IN
screw_surface_treatmentOXIDE
NSN5305-01-374-4828
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 39031-98C-12B · 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
•
HEAD HEIGHT: 0.077 INCHES MINIMUM AND 0.087 INCHES MAXIMUM IN
•
SCREW SURFACE TREATMENT: OXIDE
•
FASTENER LENGTH: 0.750 INCHES NOMINAL IN
•
THREAD LENGTH: 0.688 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
•
HARDNESS RATING: 36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
•
NOMINAL THREAD DIAMETER: 0.164 INCHES IN
•
HEAD STYLE: BUTTON
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.077 INCHES MINIMUM AND 0.087 INCHES MAXIMUM IN
SCREW SURFACE TREATMENTOXIDE
FASTENER LENGTH0.750 INCHES NOMINAL IN
THREAD LENGTH0.688 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
HARDNESS RATING36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
NOMINAL THREAD DIAMETER0.164 INCHES IN
HEAD STYLEBUTTON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.094 INCHES NOMINAL IN
SCREW MATERIALSTEEL CORROSION RESISTING
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 39031-98C-12B?
39031-98C-12B is a SCREW,MACHINE.
What is the NSN for 39031-98C-12B?
39031-98C-12B is cataloged in the U.S. Government catalog under NSN 5305-01-374-4828. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.