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19M8977 — SCREW,CAP,HEXAGON HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

19M8977: SCREW,CAP,HEXAGON HEAD.

The SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include head_height: 0.409 INCHES NOMINAL IN, thread_length: 1.024 INCHES NOMINAL IN, fastener_length: 3.346 INCHES NOMINAL IN, special_features: HEXAGON HEAD WITH FLANGE, FLANGE DIA. 0.878 IN.

IN, nominal_thread_diameter: 0.394 INCHES IN. This part is cataloged in the U.S. Government catalog under NSN 5305-01-511-5247, 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
19M8977
NSN: 5305-01-511-5247
FSC: 5305 — Screws
CAGE: 02YK8 — WEST SIDE TRACTOR SALES CO (USA)
SPECIFICATIONS
head_height0.409 INCHES NOMINAL IN
thread_length1.024 INCHES NOMINAL IN
fastener_length3.346 INCHES NOMINAL IN
special_featuresHEXAGON HEAD WITH FLANGE, FLANGE DIA. 0.878 IN. IN
nominal_thread_diameter0.394 INCHES IN
NSN5305-01-511-5247
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 19M8977 · 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: 0.409 INCHES NOMINAL IN
•
FASTENER LENGTH: 3.346 INCHES NOMINAL IN
•
THREAD LENGTH: 1.024 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.394 INCHES IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.409 INCHES NOMINAL IN
FASTENER LENGTH3.346 INCHES NOMINAL IN
THREAD LENGTH1.024 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.394 INCHES IN
SPECIAL FEATURESHEXAGON HEAD WITH FLANGE, FLANGE DIA. 0.878 IN. IN
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-001-5016 5305-00-001-9160 5305-00-001-9629 5305-00-001-9742 5305-00-001-9768 5305-00-003-4306 5305-00-003-6694 5305-00-003-6753
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 19M8977?
19M8977 is a SCREW,CAP,HEXAGON HEAD.
What is the NSN for 19M8977?
19M8977 is cataloged in the U.S. Government catalog under NSN 5305-01-511-5247. 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.