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PGF9391 — BOLT,RIBBED SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

PGF9391: BOLT,RIBBED SHOULDER.

The BOLT,RIBBED SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: FLAT CHAMFER, rib_length: 0.750 INCHES NOMINAL IN, head_height: 0.312 INCHES NOMINAL IN, rib_quantity: 25, thread_class: 3A A. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-275-4078, 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
PGF9391
NSN: 5306-00-275-4078
FSC: 5306 — Bolts
CAGE: 77237 — DANA OFF HIGHWAY PRODUCTS, LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleFLAT CHAMFER
rib_length0.750 INCHES NOMINAL IN
head_height0.312 INCHES NOMINAL IN
rib_quantity25
thread_class3A A
head_diameter1.188 INCHES NOMINAL IN
thread_length1.250 INCHES MINIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length2.531 INCHES NOMINAL IN
shoulder_length0.875 INCHES NOMINAL FIRST SHOULDER IN
thread_directionRIGHT-HAND
NSN5306-00-275-4078
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: PGF9391 · 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: 0.312 INCHES NOMINAL IN
•
FASTENER LENGTH: 2.531 INCHES NOMINAL IN
•
SHOULDER LENGTH: 0.875 INCHES NOMINAL FIRST SHOULDER IN
•
DISTANCE FROM LARGEST DIAMETER OF BEARING SURFACE OF HEAD TO RIBS: 0.125 INCHES NOMINAL IN
•
THREAD LENGTH: 1.250 INCHES MINIMUM IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
RIB LENGTH: 0.750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.312 INCHES NOMINAL IN
FASTENER LENGTH2.531 INCHES NOMINAL IN
SHOULDER LENGTH0.875 INCHES NOMINAL FIRST SHOULDER IN
DISTANCE FROM LARGEST DIAMETER OF BEARING SURFACE OF HEAD TO RIBS0.125 INCHES NOMINAL IN
THREAD LENGTH1.250 INCHES MINIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
MATERIAL DOCUMENT AND CLASSIFICATIONSAE GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
RIB LENGTH0.750 INCHES NOMINAL IN
RIB MINOR DIAMETER0.835 INCHES MINIMUM AND 0.840 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.750 INCHES IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is PGF9391?
PGF9391 is a BOLT,RIBBED SHOULDER.
What is the NSN for PGF9391?
PGF9391 is cataloged in the U.S. Government catalog under NSN 5306-00-275-4078. 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.