PartsTable
Technical Data Sheet

20631/300.16 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

20631/300.16: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FLAT CHAMFER, head_height: 0.075 INCHES NOMINAL IN, head_diameter: 0.281 INCHES NOMINAL IN, thread_length: 0.160 INCHES NOMINAL IN, screw_material: STEEL CORROSION RESISTING, fastener_length: 0.200 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-152-0581, 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
20631/300.16
NSN: 5305-01-152-0581
FSC: 5305 — Screws
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
head_styleFLAT CHAMFER
head_height0.075 INCHES NOMINAL IN
head_diameter0.281 INCHES NOMINAL IN
thread_length0.160 INCHES NOMINAL IN
screw_materialSTEEL CORROSION RESISTING
fastener_length0.200 INCHES NOMINAL IN
special_featuresUNDERCUT HEAD; INTERNAL DRIVE SLOT 0.030 IN. W AND 0.030 IN. DP IN
thread_directionRIGHT-HAND
internal_drive_styleSLOT
nominal_thread_diameter0.142 INCHES IN
thread_series_designatorBA
part_name_assigned_by_controlling_agencyNAVY SPECIAL PROJECT
NSN5305-01-152-0581
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 20631/300.16 · 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: 0.075 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.200 INCHES NOMINAL IN
•
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: BS 970 416 S41 ASSN STD SINGLE MATERIAL RESPONSE
•
THREAD LENGTH: 0.160 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.142 INCHES IN
•
HEAD STYLE: FLAT CHAMFER
•
THREAD DIRECTION: RIGHT-HAND
•
SCREW MATERIAL: STEEL CORROSION RESISTING
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.075 INCHES NOMINAL IN
FASTENER LENGTH0.200 INCHES NOMINAL IN
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONBS 970 416 S41 ASSN STD SINGLE MATERIAL RESPONSE
THREAD LENGTH0.160 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.142 INCHES IN
HEAD STYLEFLAT CHAMFER
THREAD DIRECTIONRIGHT-HAND
SCREW MATERIALSTEEL CORROSION RESISTING
SPECIAL FEATURESUNDERCUT HEAD; INTERNAL DRIVE SLOT 0.030 IN. W AND 0.030 IN. DP IN
INTERNAL DRIVE STYLESLOT
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

No substitute or cross-reference records for this part.

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 20631/300.16?
20631/300.16 is a SCREW,MACHINE.
What is the NSN for 20631/300.16?
20631/300.16 is cataloged in the U.S. Government catalog under NSN 5305-01-152-0581. 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.