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12387271-77 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

12387271-77: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: HEXAGON, head_height: 0.105 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 0.767 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN, screw_material: STEEL, fastener_length: 0.850 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-384-2995, 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
12387271-77
NSN: 5305-01-384-2995
FSC: 5305 — Screws
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
head_styleHEXAGON
head_height0.105 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
thread_class2A A
thread_length0.767 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
screw_materialSTEEL
fastener_length0.850 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
special_featuresFINISH 1.9.2.3 OF MIL-STD-171, EXCEPT .0003 THICK. SUPPLEMENTARY CHROMATE TREATMENT TO BE BRONZE OR OLIVE DRAB IN COLOR
thread_directionRIGHT-HAND
width_between_flats0.305 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN
internal_drive_styleSLOT
nominal_thread_diameter0.190 INCHES IN
minimum_tensile_strength60000 POUNDS PER SQUARE INCH LBS
NSN5305-01-384-2995
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 12387271-77 · 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: 0.105 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.850 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.767 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
HEAD STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 0.305 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN
•
SCREW MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.105 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
FASTENER LENGTH0.850 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
THREAD LENGTH0.767 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.305 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN
SCREW MATERIALSTEEL
SPECIAL FEATURESFINISH 1.9.2.3 OF MIL-STD-171, EXCEPT .0003 THICK. SUPPLEMENTARY CHROMATE TREATMENT TO BE BRONZE OR OLIVE DRAB IN COLOR
MINIMUM TENSILE STRENGTH60000 POUNDS PER SQUARE INCH LBS
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
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 12387271-77?
12387271-77 is a SCREW,MACHINE.
What is the NSN for 12387271-77?
12387271-77 is cataloged in the U.S. Government catalog under NSN 5305-01-384-2995. 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.