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4AK85 — SCREW,TAPPING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

4AK85: SCREW,TAPPING.

The SCREW,TAPPING is a the manufacturer industrial component. Key specifications include head_style: HEXAGON EXTENDED WASHER, fastener_length: 3.250 INCHES NOMINAL IN, nonmachine_thread_style: CONE POINT (TYPE BP), nonmachine_nominal_thread_diameter: 3.250 INCHES IN, part_name_assigned_by_controlling_agency: RED HEAD MASONRY SCREW,HEX. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-586-7941, 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
4AK85
NSN: 5305-01-586-7941
FSC: 5305 — Screws
CAGE: 4M876 — GRAINGER DIV OF W W GRAINGER INC (USA)
SPECIFICATIONS
head_styleHEXAGON EXTENDED WASHER
fastener_length3.250 INCHES NOMINAL IN
nonmachine_thread_styleCONE POINT (TYPE BP)
nonmachine_nominal_thread_diameter3.250 INCHES IN
part_name_assigned_by_controlling_agencyRED HEAD MASONRY SCREW,HEX
NSN5305-01-586-7941
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 4AK85 · 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
•
NONMACHINE NOMINAL THREAD DIAMETER: 3.250 INCHES IN
•
FASTENER LENGTH: 3.250 INCHES NOMINAL IN
•
NONMACHINE THREAD STYLE: CONE POINT (TYPE BP)
•
HEAD STYLE: HEXAGON EXTENDED WASHER
TECHNICAL CHARACTERISTICS
NONMACHINE NOMINAL THREAD DIAMETER3.250 INCHES IN
FASTENER LENGTH3.250 INCHES NOMINAL IN
NONMACHINE THREAD STYLECONE POINT (TYPE BP)
HEAD STYLEHEXAGON EXTENDED WASHER
PART NAME ASSIGNED BY CONTROLLING AGENCYRED HEAD MASONRY SCREW,HEX
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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4AK85?
4AK85 is a SCREW,TAPPING.
What is the NSN for 4AK85?
4AK85 is cataloged in the U.S. Government catalog under NSN 5305-01-586-7941. This indicates validated use in U.S. government and defense supply chains.
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