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12705L-6C-28B — SCREW,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

12705L-6C-28B: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: FLAT CHAMFER, head_height: 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.543 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN, thread_length: 0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-354-0885, 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
12705L-6C-28B
NSN: 5305-01-354-0885
FSC: 5305 — Screws
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleFLAT CHAMFER
head_height0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.543 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
thread_length0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length2.225 INCHES MINIMUM AND 2.275 INCHES MAXIMUM IN
hardness_rating36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
locking_featureSTRIP THREADS
shoulder_length1.745 INCHES MINIMUM AND 1.755 INCHES MAXIMUM FIRST SHOULDER IN
thread_directionRIGHT-HAND
NSN5305-01-354-0885
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 12705L-6C-28B · 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: 0.187 INCHES MINIMUM IN
•
HEAD HEIGHT: 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
•
FASTENER LENGTH: 2.225 INCHES MINIMUM AND 2.275 INCHES MAXIMUM IN
•
SHOULDER LENGTH: 1.745 INCHES MINIMUM AND 1.755 INCHES MAXIMUM FIRST SHOULDER IN
•
SHOULDER DIAMETER: 0.372 INCHES MINIMUM AND 0.373 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD LENGTH: 0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
HARDNESS RATING: 36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.187 INCHES MINIMUM IN
HEAD HEIGHT0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
FASTENER LENGTH2.225 INCHES MINIMUM AND 2.275 INCHES MAXIMUM IN
SHOULDER LENGTH1.745 INCHES MINIMUM AND 1.755 INCHES MAXIMUM FIRST SHOULDER IN
SHOULDER DIAMETER0.372 INCHES MINIMUM AND 0.373 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
HARDNESS RATING36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
NOMINAL THREAD DIAMETER0.312 INCHES IN
HEAD STYLEFLAT CHAMFER
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 12705L-6C-28B?
12705L-6C-28B is a SCREW,SHOULDER.
What is the NSN for 12705L-6C-28B?
12705L-6C-28B is cataloged in the U.S. Government catalog under NSN 5305-01-354-0885. 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.