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NASM51576-31 — SCREW,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

NASM51576-31: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, head_style: FLAT CHAMFER, head_height: 0.1875 INCHES MINIMUM AND 0.2499 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.4688 INCHES MINIMUM AND 0.5312 INCHES MAXIMUM IN, thread_length: 0.4063 INCHES MINIMUM AND 0.4687 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-628-4115, 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
NASM51576-31
NSN: 5305-01-628-4115
FSC: 5305 — Screws
CAGE: 5B5M3 — DEVCOM CHEMICAL BIOLOGICAL CENTER DBA CHEMICAL BIOLOGICAL CENTER DIV U.S. DEPT OF ARMY (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
head_styleFLAT CHAMFER
head_height0.1875 INCHES MINIMUM AND 0.2499 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.4688 INCHES MINIMUM AND 0.5312 INCHES MAXIMUM IN
thread_length0.4063 INCHES MINIMUM AND 0.4687 INCHES MAXIMUM IN
fastener_length1.9063 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_across_flats0.1560 INCHES NOMINAL IN
internal_drive_styleHEXAGON
nominal_thread_diameter0.250 INCHES IN
thread_quantity_per_inch20
NSN5305-01-628-4115
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: NASM51576-31 · 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
•
WIDTH ACROSS FLATS: 0.1560 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.1875 INCHES MINIMUM AND 0.2499 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.9063 INCHES NOMINAL IN
•
THREAD LENGTH: 0.4063 INCHES MINIMUM AND 0.4687 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
HEAD STYLE: FLAT CHAMFER
•
THREAD DIRECTION: RIGHT-HAND
•
INTERNAL DRIVE STYLE: HEXAGON
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.1560 INCHES NOMINAL IN
HEAD HEIGHT0.1875 INCHES MINIMUM AND 0.2499 INCHES MAXIMUM IN
FASTENER LENGTH1.9063 INCHES NOMINAL IN
THREAD LENGTH0.4063 INCHES MINIMUM AND 0.4687 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
HEAD STYLEFLAT CHAMFER
THREAD DIRECTIONRIGHT-HAND
INTERNAL DRIVE STYLEHEXAGON
THREAD CLASS2A A
THREAD QUANTITY PER INCH20
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 NASM51576-31?
NASM51576-31 is a SCREW,SHOULDER.
What is the NSN for NASM51576-31?
NASM51576-31 is cataloged in the U.S. Government catalog under NSN 5305-01-628-4115. 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.