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66113-20 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

66113-20: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FLAT CHAMFER, head_height: 0.055 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.213 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN, thread_length: 0.173 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN, screw_material: TITANIUM ALLOY UNS R54520. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-916-6989, 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
66113-20
NSN: 5305-00-916-6989
FSC: 5305 — Screws
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)
SPECIFICATIONS
head_styleFLAT CHAMFER
head_height0.055 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.213 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN
thread_length0.173 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN
screw_materialTITANIUM ALLOY UNS R54520
fastener_length0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
internal_drive_styleHIGH-TORQUE
nominal_thread_diameter0.112 INCHES IN
minimum_tensile_strength160000 POUNDS PER SQUARE INCH LBS
thread_quantity_per_inch40
NSN5305-00-916-6989
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 66113-20 · 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: 0.055 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN
•
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: NAS621 ASSN STD SINGLE MATERIAL RESPONSE
•
THREAD LENGTH: 0.173 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.112 INCHES IN
•
HEAD STYLE: FLAT CHAMFER
•
THREAD DIRECTION: RIGHT-HAND
•
SCREW MATERIAL: TITANIUM ALLOY UNS R54520
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.055 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN
FASTENER LENGTH0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONNAS621 ASSN STD SINGLE MATERIAL RESPONSE
THREAD LENGTH0.173 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.112 INCHES IN
HEAD STYLEFLAT CHAMFER
THREAD DIRECTIONRIGHT-HAND
SCREW MATERIALTITANIUM ALLOY UNS R54520
MINIMUM TENSILE STRENGTH160000 POUNDS PER SQUARE INCH LBS
INTERNAL DRIVE STYLEHIGH-TORQUE
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
112-0833-020Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 66113-20?
66113-20 is a SCREW,MACHINE.
What parts can replace 66113-20?
There is 1 known substitute for 66113-20: 112-0833-020. Substitute compatibility should be verified for your specific system.
What is the NSN for 66113-20?
66113-20 is cataloged in the U.S. Government catalog under NSN 5305-00-916-6989. 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.