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4-40UNC2AX50 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

4-40UNC2AX50: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: WATERTIGHT, head_height: 0.063 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.223 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN, thread_length: 0.450 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN, screw_material: COPPER ALLOY 260. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-027-4630, 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
4-40UNC2AX50
NSN: 5305-01-027-4630
FSC: 5305 — Screws
CAGE: 70318 — ALLMETAL SCREW PRODUCTS CORP (USA)
SPECIFICATIONS
head_styleWATERTIGHT
head_height0.063 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.223 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN
thread_length0.450 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
screw_materialCOPPER ALLOY 260
fastener_length0.500 INCHES NOMINAL IN
thread_directionRIGHT-HAND
internal_drive_styleSLOT
nominal_thread_diameter0.112 INCHES IN
thread_quantity_per_inch40
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5305-01-027-4630
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 4-40UNC2AX50 · 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
•
HEAD HEIGHT: 0.063 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.500 INCHES NOMINAL IN
•
THREAD LENGTH: 0.450 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.112 INCHES IN
•
HEAD STYLE: WATERTIGHT
•
THREAD DIRECTION: RIGHT-HAND
•
SCREW MATERIAL: COPPER ALLOY 260
•
INTERNAL DRIVE STYLE: SLOT
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.063 INCHES MAXIMUM IN
FASTENER LENGTH0.500 INCHES NOMINAL IN
THREAD LENGTH0.450 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.112 INCHES IN
HEAD STYLEWATERTIGHT
THREAD DIRECTIONRIGHT-HAND
SCREW MATERIALCOPPER ALLOY 260
INTERNAL DRIVE STYLESLOT
THREAD CLASS2A A
THREAD QUANTITY PER INCH40
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 1
10558-007Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4-40UNC2AX50?
4-40UNC2AX50 is a SCREW,MACHINE.
What parts can replace 4-40UNC2AX50?
There is 1 known substitute for 4-40UNC2AX50: 10558-007. Substitute compatibility should be verified for your specific system.
What is the NSN for 4-40UNC2AX50?
4-40UNC2AX50 is cataloged in the U.S. Government catalog under NSN 5305-01-027-4630. 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.