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12578606-044075 — SCREW,CAP,HEXAGON HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

12578606-044075: SCREW,CAP,HEXAGON HEAD.

The SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include material: STEEL UNS K04100 OR STEEL OVERALL, head_style: HEXAGON, thread_length: 0.643 INCHES NOMINAL IN, fastener_length: 0.750 INCHES NOMINAL IN, thread_direction: RIGHT-HAND, width_between_flats: 0.625 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-684-9986, 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
12578606-044075
NSN: 5305-01-684-9986
FSC: 5305 — Screws
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL UNS K04100 OR STEEL OVERALL
head_styleHEXAGON
thread_length0.643 INCHES NOMINAL IN
fastener_length0.750 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_between_flats0.625 INCHES NOMINAL IN
end_item_identification01-669-0331
nominal_thread_diameter0.4375 INCHES IN
thread_quantity_per_inch20
thread_series_designatorUNF
material_document_and_classificationASTM A354 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) 1ST MATERIAL RESPONSE OR SAE J429 ASSN STD 2ND MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencySCREW, HEX HEAD, GRADE 8, UNF
NSN5305-01-684-9986
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 12578606-044075 · 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
•
FASTENER LENGTH: 0.750 INCHES NOMINAL IN
•
THREAD LENGTH: 0.643 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A354 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) 1ST MATERIAL RESPONSE OR SAE J429 ASSN STD 2ND MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.4375 INCHES IN
•
HEAD STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 0.625 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FASTENER LENGTH0.750 INCHES NOMINAL IN
THREAD LENGTH0.643 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A354 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) 1ST MATERIAL RESPONSE OR SAE J429 ASSN STD 2ND MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.4375 INCHES IN
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.625 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYSCREW, HEX HEAD, GRADE 8, UNF
END ITEM IDENTIFICATION01-669-0331
THREAD QUANTITY PER INCH20
SUBSTITUTES & CROSS-REFERENCES 1
12578606Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 12578606-044075?
12578606-044075 is a SCREW,CAP,HEXAGON HEAD.
What parts can replace 12578606-044075?
There is 1 known substitute for 12578606-044075: 12578606. Substitute compatibility should be verified for your specific system.
What is the NSN for 12578606-044075?
12578606-044075 is cataloged in the U.S. Government catalog under NSN 5305-01-684-9986. 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.