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123743-4-3 — SCREW,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

123743-4-3: SCREW,CLOSE TOLERANCE.

The SCREW,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: TITANIUM ALLOY OVERALL, head_style: FLAT COUNTERSUNK, grip_length: 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN, head_diameter: 0.464 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-172-5571, 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
123743-4-3
NSN: 5305-01-172-5571
FSC: 5305 — Screws
CAGE: 80539 — SPS TECHNOLOGIES, LLC DBA AEROSPACE FASTENERS GROUP DIV AEROSPACE - SANTA ANA (USA)
SPECIFICATIONS
materialTITANIUM ALLOY OVERALL
head_styleFLAT COUNTERSUNK
grip_length0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN
thread_class3A A
grip_diameter0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN
head_diameter0.464 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN
thread_length0.378 INCHES MINIMUM AND 0.428 INCHES MAXIMUM IN
surface_finish32.0 MICROINCHES THREADS
fastener_length0.575 INCHES MINIMUM AND 0.605 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
countersink_angle99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
internal_drive_styleOFFSET CRUCIFORM (TORQUE SET)
NSN5305-01-172-5571
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 123743-4-3 · 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
•
SURFACE FINISH: 32.0 MICROINCHES THREADS
•
FASTENER LENGTH: 0.575 INCHES MINIMUM AND 0.605 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.378 INCHES MINIMUM AND 0.428 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 4967 COMP 6AL-4V ASSN STD SINGLE MATERIAL RESPONSE OVERALL V
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
HEAD STYLE: FLAT COUNTERSUNK
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
SURFACE FINISH32.0 MICROINCHES THREADS
SURFACE FINISH32.0 MICROINCHES GRIP
FASTENER LENGTH0.575 INCHES MINIMUM AND 0.605 INCHES MAXIMUM IN
THREAD LENGTH0.378 INCHES MINIMUM AND 0.428 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 4967 COMP 6AL-4V ASSN STD SINGLE MATERIAL RESPONSE OVERALL V
NOMINAL THREAD DIAMETER0.250 INCHES IN
HEAD STYLEFLAT COUNTERSUNK
THREAD DIRECTIONRIGHT-HAND
SPECIFICATION/STANDARD DATA80205-NAS1580 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
GRIP LENGTH0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-001-5016 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 7
PBF1417-4-3Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
SC3102-4-3Reference document
Same NSN cross-reference
Reference document — Secondary reference
T009-4-3Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
03A174-4-3Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
SLB146-4-3Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
HR240-4-3Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 123743-4-3?
123743-4-3 is a SCREW,CLOSE TOLERANCE.
What parts can replace 123743-4-3?
There are 7 known substitutes for 123743-4-3: PBF1417-4-3, SC3102-4-3, T009-4-3 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 123743-4-3?
123743-4-3 is cataloged in the U.S. Government catalog under NSN 5305-01-172-5571. 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.