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HT4069-6-21A — SCREW,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

HT4069-6-21A: SCREW,CLOSE TOLERANCE.

The SCREW,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY 718 OVERALL, head_style: FLAT COUNTERSUNK, grip_length: 1.3025 INCHES MINIMUM AND 1.3225 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN, head_diameter: 0.564 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-723-5487, 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
HT4069-6-21A
NSN: 5305-01-723-5487
FSC: 5305 — Screws
CAGE: 80539 — SPS TECHNOLOGIES, LLC DBA AEROSPACE FASTENERS GROUP DIV AEROSPACE - SANTA ANA (USA)
SPECIFICATIONS
materialNICKEL ALLOY 718 OVERALL
head_styleFLAT COUNTERSUNK
grip_length1.3025 INCHES MINIMUM AND 1.3225 INCHES MAXIMUM IN
thread_class3A A
grip_diameter0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN
head_diameter0.564 INCHES NOMINAL IN
thread_length0.641 INCHES NOMINAL IN
fastener_length1.9385 INCHES MINIMUM AND 1.9685 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
countersink_angle99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
features_providedCETYL ALCOHOL LUBRICANT
surface_treatmentALUMINUM AND CHROMATE OVERALL
NSN5305-01-723-5487
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: HT4069-6-21A · 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: 1.9385 INCHES MINIMUM AND 1.9685 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ION VAPOR DEPOSITED ALUMINUM PER MIL-DTL-83488, TYPE II, CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.641 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: INCO 718 PER AMS 5662 AEROSPACE MATERIAL SPEC STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
FEATURES PROVIDED: CETYL ALCOHOL LUBRICANT
•
HEAD STYLE: FLAT COUNTERSUNK
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
FASTENER LENGTH1.9385 INCHES MINIMUM AND 1.9685 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONION VAPOR DEPOSITED ALUMINUM PER MIL-DTL-83488, TYPE II, CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.641 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONINCO 718 PER AMS 5662 AEROSPACE MATERIAL SPEC STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.375 INCHES IN
FEATURES PROVIDEDCETYL ALCOHOL LUBRICANT
HEAD STYLEFLAT COUNTERSUNK
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH1.3025 INCHES MINIMUM AND 1.3225 INCHES MAXIMUM IN
GRIP DIAMETER0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN
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 3
3M927-6L21Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
WC4069-6-21Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
11885-6L21Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is HT4069-6-21A?
HT4069-6-21A is a SCREW,CLOSE TOLERANCE.
What parts can replace HT4069-6-21A?
There are 3 known substitutes for HT4069-6-21A: 3M927-6L21, WC4069-6-21, 11885-6L21. Substitute compatibility should be verified for your specific system.
What is the NSN for HT4069-6-21A?
HT4069-6-21A is cataloged in the U.S. Government catalog under NSN 5305-01-723-5487. 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.