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91099A220 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

91099A220: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FLAT COUNTERSUNK UNDERCUT, head_height: 0.059 INCHES NOMINAL IN, thread_class: 2A A, head_diameter: 0.262 INCHES NOMINAL IN, thread_length: 0.441 INCHES NOMINAL IN, screw_material: STEEL COMP 302. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-590-3191, 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
91099A220
NSN: 5305-01-590-3191
FSC: 5305 — Screws
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
head_styleFLAT COUNTERSUNK UNDERCUT
head_height0.059 INCHES NOMINAL IN
thread_class2A A
head_diameter0.262 INCHES NOMINAL IN
thread_length0.441 INCHES NOMINAL IN
screw_materialSTEEL COMP 302
fastener_length0.559 INCHES NOMINAL IN
thread_directionRIGHT-HAND
countersink_angle82.0 DEGREES NOMINAL
internal_drive_styleCROSS RECESS TYPE II
nominal_thread_diameter0.138 INCHES IN
thread_quantity_per_inch32
NSN5305-01-590-3191
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 91099A220 · 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: 0.059 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.559 INCHES NOMINAL IN
•
THREAD LENGTH: 0.441 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.138 INCHES IN
•
HEAD STYLE: FLAT COUNTERSUNK UNDERCUT
•
THREAD DIRECTION: RIGHT-HAND
•
SCREW MATERIAL: STEEL COMP 302
•
INTERNAL DRIVE STYLE: CROSS RECESS TYPE II
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.059 INCHES NOMINAL IN
FASTENER LENGTH0.559 INCHES NOMINAL IN
THREAD LENGTH0.441 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.138 INCHES IN
HEAD STYLEFLAT COUNTERSUNK UNDERCUT
THREAD DIRECTIONRIGHT-HAND
SCREW MATERIALSTEEL COMP 302
INTERNAL DRIVE STYLECROSS RECESS TYPE II
COUNTERSINK ANGLE82.0 DEGREES NOMINAL
PART NAME ASSIGNED BY CONTROLLING AGENCY18-8 STAINLESS STEEL PHILLIPS UNDERCUT FLAT HEAD MACHINE SCREW
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
10-52925-05Same 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 91099A220?
91099A220 is a SCREW,MACHINE.
What parts can replace 91099A220?
There is 1 known substitute for 91099A220: 10-52925-05. Substitute compatibility should be verified for your specific system.
What is the NSN for 91099A220?
91099A220 is cataloged in the U.S. Government catalog under NSN 5305-01-590-3191. 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.