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31N25KKK — SCREW,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

31N25KKK: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: FLAT CHAMFER, head_height: 0.219 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 0.438 INCHES NOMINAL IN, thread_length: 0.438 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-394-7287, 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
31N25KKK
NSN: 5305-01-394-7287
FSC: 5305 — Screws
CAGE: 0R3M6 — MULTI-FASTENERS INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleFLAT CHAMFER
head_height0.219 INCHES NOMINAL IN
thread_class3A A
head_diameter0.438 INCHES NOMINAL IN
thread_length0.438 INCHES NOMINAL IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length0.688 INCHES NOMINAL IN
shoulder_length0.250 INCHES NOMINAL FIRST SHOULDER IN
thread_directionRIGHT-HAND
shoulder_diameter0.312 INCHES NOMINAL FIRST SHOULDER IN
width_across_flats0.156 INCHES NOMINAL IN
NSN5305-01-394-7287
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 31N25KKK · 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: 0.156 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.219 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.688 INCHES NOMINAL IN
•
SHOULDER LENGTH: 0.250 INCHES NOMINAL FIRST SHOULDER IN
•
SHOULDER DIAMETER: 0.312 INCHES NOMINAL FIRST SHOULDER IN
•
THREAD LENGTH: 0.438 INCHES NOMINAL IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.156 INCHES NOMINAL IN
HEAD HEIGHT0.219 INCHES NOMINAL IN
FASTENER LENGTH0.688 INCHES NOMINAL IN
SHOULDER LENGTH0.250 INCHES NOMINAL FIRST SHOULDER IN
SHOULDER DIAMETER0.312 INCHES NOMINAL FIRST SHOULDER IN
THREAD LENGTH0.438 INCHES NOMINAL IN
SHOULDER SHAPEROUND FIRST SHOULDER
NOMINAL THREAD DIAMETER0.250 INCHES IN
HEAD STYLEFLAT CHAMFER
THREAD DIRECTIONRIGHT-HAND
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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 31N25KKK?
31N25KKK is a SCREW,SHOULDER.
What is the NSN for 31N25KKK?
31N25KKK is cataloged in the U.S. Government catalog under NSN 5305-01-394-7287. 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.