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549-1091-01 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

549-1091-01: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FLAT COUNTERSUNK UNDERCUT, head_height: 0.018 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.099 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN, thread_length: 0.050 INCHES MINIMUM AND 0.082 INCHES MAXIMUM IN, fastener_length: 0.100 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-047-6233, 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
549-1091-01
NSN: 5305-01-047-6233
FSC: 5305 — Screws
CAGE: 25583 — ACRON AVIATION, INC. (USA)
SPECIFICATIONS
head_styleFLAT COUNTERSUNK UNDERCUT
head_height0.018 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.099 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN
thread_length0.050 INCHES MINIMUM AND 0.082 INCHES MAXIMUM IN
fastener_length0.100 INCHES NOMINAL IN
thread_directionRIGHT-HAND
countersink_angle811.0 DEGREES NOMINAL
internal_drive_styleCROSS RECESS TYPE 1
nominal_thread_diameter0.060 INCHES IN
screw_surface_treatmentPASSIVATE
thread_quantity_per_inch80
NSN5305-01-047-6233
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 549-1091-01 · 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: 0.018 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN
•
SCREW SURFACE TREATMENT: PASSIVATE
•
FASTENER LENGTH: 0.100 INCHES NOMINAL IN
•
THREAD LENGTH: 0.050 INCHES MINIMUM AND 0.082 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.060 INCHES IN
•
HEAD STYLE: FLAT COUNTERSUNK UNDERCUT
•
THREAD DIRECTION: RIGHT-HAND
•
SCREW MATERIAL: STEEL 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
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.018 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN
SCREW SURFACE TREATMENTPASSIVATE
FASTENER LENGTH0.100 INCHES NOMINAL IN
THREAD LENGTH0.050 INCHES MINIMUM AND 0.082 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.060 INCHES IN
HEAD STYLEFLAT COUNTERSUNK UNDERCUT
THREAD DIRECTIONRIGHT-HAND
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
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
COUNTERSINK ANGLE811.0 DEGREES NOMINAL
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 1
10114909Reference document
Same NSN cross-reference
Reference document — Informative reference only
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 549-1091-01?
549-1091-01 is a SCREW,MACHINE.
What parts can replace 549-1091-01?
There is 1 known substitute for 549-1091-01: 10114909. Substitute compatibility should be verified for your specific system.
What is the NSN for 549-1091-01?
549-1091-01 is cataloged in the U.S. Government catalog under NSN 5305-01-047-6233. 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.