PartsTable
Technical Data Sheet

1/4-28X.50LONG — SETSCREW

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

1/4-28X.50LONG: SETSCREW.

The SETSCREW is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYAMIDE NYLON OVERALL, head_style: HEADLESS (SETSCREW), point_style: POINTLESS, thread_class: 2A A, fastener_length: 0.470 INCHES MINIMUM AND 0.530 INCHES MAXIMUM IN, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-030-5542, 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
1/4-28X.50LONG
NSN: 5305-01-030-5542
FSC: 5305 — Screws
CAGE: 9N045 — HILCO PLASTICS PRODUCTS CO INC DBA HILCO TECHNOLOGIES (USA)
SPECIFICATIONS
materialPLASTIC POLYAMIDE NYLON OVERALL
head_styleHEADLESS (SETSCREW)
point_stylePOINTLESS
thread_class2A A
fastener_length0.470 INCHES MINIMUM AND 0.530 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
internal_drive_styleSLOT
nominal_thread_diameter0.250 INCHES IN
thread_quantity_per_inch28
thread_series_designatorUNF
NSN5305-01-030-5542
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1/4-28X.50LONG · 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: 0.470 INCHES MINIMUM AND 0.530 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
HEAD STYLE: HEADLESS (SETSCREW)
•
THREAD DIRECTION: RIGHT-HAND
•
POINT STYLE: POINTLESS
•
INTERNAL DRIVE STYLE: SLOT
•
THREAD CLASS: 2A A
•
THREAD QUANTITY PER INCH: 28
TECHNICAL CHARACTERISTICS
FASTENER LENGTH0.470 INCHES MINIMUM AND 0.530 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
HEAD STYLEHEADLESS (SETSCREW)
THREAD DIRECTIONRIGHT-HAND
POINT STYLEPOINTLESS
INTERNAL DRIVE STYLESLOT
THREAD CLASS2A A
THREAD QUANTITY PER INCH28
MATERIALPLASTIC POLYAMIDE NYLON OVERALL
THREAD SERIES DESIGNATORUNF
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
642AS1005-1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 1/4-28X.50LONG?
1/4-28X.50LONG is a SETSCREW.
What parts can replace 1/4-28X.50LONG?
There is 1 known substitute for 1/4-28X.50LONG: 642AS1005-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 1/4-28X.50LONG?
1/4-28X.50LONG is cataloged in the U.S. Government catalog under NSN 5305-01-030-5542. 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.