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HT5UA8 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FLAT COUNTERSUNK UNDERCUT, head_height: 0.087 INCHES MINIMUM AND 0.089 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.628 INCHES MINIMUM AND 0.633 INCHES MAXIMUM IN, thread_length: 0.531 INCHES MINIMUM IN, screw_material: STEEL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-726-1142, 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
HT5UA8
NSN: 5305-00-726-1142
FSC: 5305
CAGE: R1120 — SATAIR A/S (DNK)
SPECIFICATIONS
head_styleFLAT COUNTERSUNK UNDERCUT
head_height0.087 INCHES MINIMUM AND 0.089 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.628 INCHES MINIMUM AND 0.633 INCHES MAXIMUM IN
thread_length0.531 INCHES MINIMUM IN
screw_materialSTEEL
fastener_length1.031 INCHES NOMINAL IN
thread_directionRIGHT-HAND
countersink_angle100.0 DEGREES NOMINAL
internal_drive_styleHIGH-TORQUE
nominal_thread_diameter0.312 INCHES IN
screw_surface_treatmentCADMIUM
NSN5305-00-726-1142
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: HT5UA8 · 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
•
THREAD QUANTITY PER INCH: 24
•
THREAD LENGTH: 0.531 INCHES MINIMUM IN
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD SERIES DESIGNATOR: UNF
•
HEAD DIAMETER: 0.628 INCHES MINIMUM AND 0.633 INCHES MAXIMUM IN
•
SCREW SURFACE TREATMENT: CADMIUM
•
THREAD CLASS: 3A A
•
NOMINAL THREAD DIAMETER: 0.312 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH24
THREAD LENGTH0.531 INCHES MINIMUM IN
THREAD DIRECTIONRIGHT-HAND
THREAD SERIES DESIGNATORUNF
HEAD DIAMETER0.628 INCHES MINIMUM AND 0.633 INCHES MAXIMUM IN
SCREW SURFACE TREATMENTCADMIUM
THREAD CLASS3A A
NOMINAL THREAD DIAMETER0.312 INCHES IN
HEAD STYLEFLAT COUNTERSUNK UNDERCUT
HEAD HEIGHT0.087 INCHES MINIMUM AND 0.089 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
MULTIGRADE FB SWInterchangeable
interchangeable cross-reference
interchangeable
5551Interchangeable
interchangeable cross-reference
interchangeable
189 3890Interchangeable
interchangeable cross-reference
interchangeable
54266-8Interchangeable
Same NIIN cross-reference
interchangeable
HT403A5-8Interchangeable
Same NIIN cross-reference
interchangeable
3M47-5-8Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is HT5UA8?
HT5UA8 is a SCREW,MACHINE.
What parts can replace HT5UA8?
There are 6 known substitutes for HT5UA8: MULTIGRADE FB SW, 5551, 189 3890 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for HT5UA8?
HT5UA8 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-726-1142. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026