PartsTable
Technical Data Sheet
Download PDF

8-77391-7 — BOLT,INTERNAL WRENCHING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

8-77391-7: BOLT,INTERNAL WRENCHING.

The BOLT,INTERNAL WRENCHING is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, hole_type: DRILLED, head_style: BEVEL-CONICAL, head_height: 0.312 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 0.521 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-655-6106, 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
8-77391-7
NSN: 5306-00-655-6106
FSC: 5306 — Bolts
CAGE: 15090 — RAYTHEON COMPANY (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
hole_typeDRILLED
head_styleBEVEL-CONICAL
head_height0.312 INCHES NOMINAL IN
thread_class3A A
head_diameter0.521 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
hole_diameter0.058 INCHES NOMINAL IN
hole_quantity4
thread_length0.960 INCHES MINIMUM IN
fastener_length1.900 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_across_flats0.219 INCHES MINIMUM AND 0.221 INCHES MAXIMUM IN
NSN5306-00-655-6106
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 8-77391-7 · 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: 0.219 INCHES MINIMUM AND 0.221 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.312 INCHES NOMINAL IN
•
FASTENER LENGTH: 1.900 INCHES NOMINAL IN
•
THREAD LENGTH: 0.960 INCHES MINIMUM IN
•
HOLE CONFIGURATION STYLE: ROUND
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5000,COMP 4340 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.312 INCHES IN
•
HEAD STYLE: BEVEL-CONICAL
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.219 INCHES MINIMUM AND 0.221 INCHES MAXIMUM IN
HEAD HEIGHT0.312 INCHES NOMINAL IN
FASTENER LENGTH1.900 INCHES NOMINAL IN
THREAD LENGTH0.960 INCHES MINIMUM IN
HOLE CONFIGURATION STYLEROUND
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5000,COMP 4340 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.312 INCHES IN
HEAD STYLEBEVEL-CONICAL
THREAD DIRECTIONRIGHT-HAND
MINIMUM TENSILE STRENGTH150000 POUNDS PER SQUARE INCH LBS
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
Ready to buy 8-77391-7?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 8-77391-7?
8-77391-7 is a BOLT,INTERNAL WRENCHING.
What is the NSN for 8-77391-7?
8-77391-7 is cataloged in the U.S. Government catalog under NSN 5306-00-655-6106. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 8-77391-7

✓ 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.