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321-0427-020 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

321-0427-020: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FILLISTER, head_height: 0.045 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.104 INCHES MINIMUM AND 0.118 INCHES MAXIMUM IN, thread_length: 0.143 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN, fastener_length: 0.157 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-101-6020, 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
321-0427-020
NSN: 5305-01-101-6020
FSC: 5305 — Screws
CAGE: 13499 — ROCKWELL COLLINS, INC. DBA COLLINS AEROSPACE GOVERNMENT SYSTEMS DIV COLLINS AEROSPACE - GOVERNMENT SYSTEMS (USA)
SPECIFICATIONS
head_styleFILLISTER
head_height0.045 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.104 INCHES MINIMUM AND 0.118 INCHES MAXIMUM IN
thread_length0.143 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
fastener_length0.157 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
internal_drive_styleSLOT
nominal_thread_diameter0.073 INCHES IN
screw_surface_treatmentPASSIVATE
minimum_tensile_strength80000 POUNDS PER SQUARE INCH LBS
thread_quantity_per_inch72
NSN5305-01-101-6020
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 321-0427-020 · 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: 0.045 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN
•
SCREW SURFACE TREATMENT: PASSIVATE
•
FASTENER LENGTH: 0.157 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.143 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.073 INCHES IN
•
HEAD STYLE: FILLISTER
•
THREAD DIRECTION: RIGHT-HAND
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND 4S STYLE
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.045 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN
SCREW SURFACE TREATMENTPASSIVATE
FASTENER LENGTH0.157 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
THREAD LENGTH0.143 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.073 INCHES IN
HEAD STYLEFILLISTER
THREAD DIRECTIONRIGHT-HAND
NONDEFINITIVE SPEC/STD DATA1 TYPE AND 4S STYLE
SCREW MATERIALSTEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 302B OR STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 304 OR STEEL COMP 304L OR STEEL COMP 305 OR STEEL COMP 308 OR STEEL COMP 309 OR STEEL COMP 309S OR STEEL COMP 310 OR STEEL COMP 310S OR STEEL COMP 314 OR STEEL COMP 316 OR STEEL COMP 316L OR STEEL COMP 317 OR STEEL COMP 321 OR STEEL COMP 347 OR STEEL COMP 348 OR STEEL COMP 384 OR STEEL COMP 385
MINIMUM TENSILE STRENGTH80000 POUNDS PER SQUARE INCH LBS
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 2
FF-S-92Reference document
Same NSN cross-reference
Reference document — Identification reference
P321-0427-020Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 321-0427-020?
321-0427-020 is a SCREW,MACHINE.
What parts can replace 321-0427-020?
There are 2 known substitutes for 321-0427-020: FF-S-92, P321-0427-020. Substitute compatibility should be verified for your specific system.
What is the NSN for 321-0427-020?
321-0427-020 is cataloged in the U.S. Government catalog under NSN 5305-01-101-6020. 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.