8763020 — BOLT,RIBBED SHOULDER

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

8763020: BOLT,RIBBED SHOULDER.

The BOLT,RIBBED SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1340 OR STEEL COMP 4140 OR STEEL COMP 8640 OVERALL, head_style: FLAT CHAMFER, rib_length: 1.040 INCHES MINIMUM AND 1.100 INCHES MAXIMUM IN, head_height: 0.310 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 1.310 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-678-4770, 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

8763020

NSN: 5306-00-678-4770
FSC: 5306 — Bolts
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)

SPECIFICATIONS

material	STEEL COMP 1340 OR STEEL COMP 4140 OR STEEL COMP 8640 OVERALL
head_style	FLAT CHAMFER
rib_length	1.040 INCHES MINIMUM AND 1.100 INCHES MAXIMUM IN
head_height	0.310 INCHES NOMINAL IN
thread_class	3A A
head_diameter	1.310 INCHES NOMINAL IN
thread_length	1.750 INCHES MINIMUM IN
shoulder_shape	ROUND FIRST SHOULDER
fastener_length	4.250 INCHES NOMINAL IN
hardness_rating	32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
shoulder_length	1.160 INCHES NOMINAL FIRST SHOULDER IN
thread_direction	RIGHT-HAND
NSN	5306-00-678-4770

COMPONENT DIAGRAM

KEY FEATURES

•

HEAD HEIGHT: 0.310 INCHES NOMINAL IN

•

FASTENER LENGTH: 4.250 INCHES NOMINAL IN

•

SHOULDER LENGTH: 1.160 INCHES NOMINAL FIRST SHOULDER IN

•

DISTANCE FROM LARGEST DIAMETER OF BEARING SURFACE OF HEAD TO RIBS: 0.060 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN

•

SHOULDER DIAMETER: 0.960 INCHES MINIMUM AND 0.965 INCHES MAXIMUM FIRST SHOULDER IN

•

THREAD LENGTH: 1.750 INCHES MINIMUM IN

•

SHOULDER SHAPE: ROUND FIRST SHOULDER

•

HARDNESS RATING: 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL

TECHNICAL CHARACTERISTICS

HEAD HEIGHT	0.310 INCHES NOMINAL IN
FASTENER LENGTH	4.250 INCHES NOMINAL IN
SHOULDER LENGTH	1.160 INCHES NOMINAL FIRST SHOULDER IN
DISTANCE FROM LARGEST DIAMETER OF BEARING SURFACE OF HEAD TO RIBS	0.060 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
SHOULDER DIAMETER	0.960 INCHES MINIMUM AND 0.965 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH	1.750 INCHES MINIMUM IN
SHOULDER SHAPE	ROUND FIRST SHOULDER
HARDNESS RATING	32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
RIB LENGTH	1.040 INCHES MINIMUM AND 1.100 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER	0.875 INCHES IN

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 1

5306006784770Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 8763020?

8763020 is a BOLT,RIBBED SHOULDER.

What parts can replace 8763020?

There is 1 known substitute for 8763020: 5306006784770. Substitute compatibility should be verified for your specific system.

What is the NSN for 8763020?

8763020 is cataloged in the U.S. Government catalog under NSN 5306-00-678-4770. This indicates validated use in U.S. government and defense supply chains.

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8763020 — BOLT,RIBBED SHOULDER

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