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12543051-020 — SCREW,CAP,HEXAGON HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

12543051-020: SCREW,CAP,HEXAGON HEAD.

The SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include head_style: HEXAGON EXTENDED WASHER, head_height: 0.280 INCHES MAXIMUM IN, thread_length: 0.750 INCHES NOMINAL IN, fastener_length: 0.750 INCHES MAXIMUM IN, special_features: MATERIAL IS STEEL, GRADE 5. PROTECTIVE FINISH IAW 12424710, METHOD 4., thread_direction: RIGHT-HAND.

This part is cataloged in the U.S. Government catalog under NSN 5305-01-644-3333, 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
12543051-020
NSN: 5305-01-644-3333
FSC: 5305 — Screws
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
head_styleHEXAGON EXTENDED WASHER
head_height0.280 INCHES MAXIMUM IN
thread_length0.750 INCHES NOMINAL IN
fastener_length0.750 INCHES MAXIMUM IN
special_featuresMATERIAL IS STEEL, GRADE 5. PROTECTIVE FINISH IAW 12424710, METHOD 4.
thread_directionRIGHT-HAND
width_between_flats0.375 INCHES MAXIMUM IN
end_item_identification2320-01-595-3994
nominal_thread_diameter0.250 INCHES IN
extended_washer_diameter0.560 INCHES MAXIMUM IN
thread_quantity_per_inch20
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5305-01-644-3333
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 12543051-020 · 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: 0.280 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.750 INCHES MAXIMUM IN
•
EXTENDED WASHER DIAMETER: 0.560 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.750 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
HEAD STYLE: HEXAGON EXTENDED WASHER
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 0.375 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.280 INCHES MAXIMUM IN
FASTENER LENGTH0.750 INCHES MAXIMUM IN
EXTENDED WASHER DIAMETER0.560 INCHES MAXIMUM IN
THREAD LENGTH0.750 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
HEAD STYLEHEXAGON EXTENDED WASHER
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.375 INCHES MAXIMUM IN
SPECIAL FEATURESMATERIAL IS STEEL, GRADE 5. PROTECTIVE FINISH IAW 12424710, METHOD 4.
PART NAME ASSIGNED BY CONTROLLING AGENCYSCREW, FLANGE, HEX
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 1
12543051Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 12543051-020?
12543051-020 is a SCREW,CAP,HEXAGON HEAD.
What parts can replace 12543051-020?
There is 1 known substitute for 12543051-020: 12543051. Substitute compatibility should be verified for your specific system.
What is the NSN for 12543051-020?
12543051-020 is cataloged in the U.S. Government catalog under NSN 5305-01-644-3333. 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.