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8448318 — SCREW,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

8448318: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL COMP E4340 OVERALL, head_style: FLAT CHAMFER, head_height: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.610 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN, thread_length: 0.610 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-182-9245, 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
8448318
NSN: 5305-00-182-9245
FSC: 5305 — Screws
CAGE: 19204 — ARMY, UNITED STATES DEPARTMENT OF THE DBA ROCK ISLAND ARSENAL JMTC (USA)
SPECIFICATIONS
materialSTEEL COMP E4340 OVERALL
head_styleFLAT CHAMFER
head_height0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.610 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN
thread_length0.610 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length0.880 INCHES MINIMUM AND 0.920 INCHES MAXIMUM IN
hardness_rating38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL
shoulder_length0.020 INCHES MINIMUM AND 0.040 INCHES MAXIMUM FIRST SHOULDER IN
thread_directionRIGHT-HAND
shoulder_diameter0.300 INCHES MINIMUM AND 0.320 INCHES MAXIMUM FIRST SHOULDER IN
NSN5305-00-182-9245
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 8448318 · 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: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.880 INCHES MINIMUM AND 0.920 INCHES MAXIMUM IN
•
SHOULDER LENGTH: 0.020 INCHES MINIMUM AND 0.040 INCHES MAXIMUM FIRST SHOULDER IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-P-15817 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
SHOULDER DIAMETER: 0.300 INCHES MINIMUM AND 0.320 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD LENGTH: 0.610 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
HARDNESS RATING: 38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
FASTENER LENGTH0.880 INCHES MINIMUM AND 0.920 INCHES MAXIMUM IN
SHOULDER LENGTH0.020 INCHES MINIMUM AND 0.040 INCHES MAXIMUM FIRST SHOULDER IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-P-15817 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SHOULDER DIAMETER0.300 INCHES MINIMUM AND 0.320 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH0.610 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
HARDNESS RATING38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.164 INCHES IN
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-001-5016 5305-00-001-9160 5305-00-001-9629 5305-00-001-9742 5305-00-001-9768 5305-00-003-4306 5305-00-003-6694 5305-00-003-6753
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 8448318?
8448318 is a SCREW,SHOULDER.
What is the NSN for 8448318?
8448318 is cataloged in the U.S. Government catalog under NSN 5305-00-182-9245. 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.