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DBS-A1-18 — SCREW,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

DBS-A1-18: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, head_style: FLAT CHAMFER, head_height: 0.187 INCHES NOMINAL IN, thread_class: 2A A, chamfer_angle: 45.0 DEGREES NOMINAL, head_diameter: 0.375 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-163-1981, 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
DBS-A1-18
NSN: 5305-01-163-1981
NIINs: 011631981, 013201041
FSC: 5305 — Screws
CAGE: 0MTR9 — NORDEX, INCORPORATED DBA NORDEX INC (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
head_styleFLAT CHAMFER
head_height0.187 INCHES NOMINAL IN
thread_class2A A
chamfer_angle45.0 DEGREES NOMINAL
head_diameter0.375 INCHES NOMINAL IN
thread_length0.250 INCHES NOMINAL IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length0.438 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
shoulder_length0.188 INCHES MINIMUM AND 0.190 INCHES MAXIMUM FIRST SHOULDER IN
thread_directionRIGHT-HAND
shoulder_diameter0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM FIRST SHOULDER IN
NSN5305-01-163-1981
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: DBS-A1-18 · 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
•
WIDTH ACROSS FLATS: 0.125 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.187 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.438 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
•
SHOULDER LENGTH: 0.188 INCHES MINIMUM AND 0.190 INCHES MAXIMUM FIRST SHOULDER IN
•
SHOULDER DIAMETER: 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD LENGTH: 0.250 INCHES NOMINAL IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.125 INCHES NOMINAL IN
HEAD HEIGHT0.187 INCHES NOMINAL IN
FASTENER LENGTH0.438 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
SHOULDER LENGTH0.188 INCHES MINIMUM AND 0.190 INCHES MAXIMUM FIRST SHOULDER IN
SHOULDER DIAMETER0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH0.250 INCHES NOMINAL IN
SHOULDER SHAPEROUND FIRST SHOULDER
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLEFLAT CHAMFER
THREAD DIRECTIONRIGHT-HAND
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 DBS-A1-18?
DBS-A1-18 is a SCREW,SHOULDER.
What is the NSN for DBS-A1-18?
DBS-A1-18 is cataloged in the U.S. Government catalog under NSN 5305-01-163-1981. 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.