A51B21651-11 — BOLT,SHOULDER

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

A51B21651-11: BOLT,SHOULDER.

The BOLT,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4340 OVERALL, head_style: HEXAGON, head_height: 0.188 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.338 INCHES MINIMUM IN, shoulder_shape: ROUND FIRST SHOULDER. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-922-1473, 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

A51B21651-11

NSN: 5306-00-922-1473
FSC: 5306 — Bolts
CAGE: 79RG9 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)

SPECIFICATIONS

material	STEEL COMP 4340 OVERALL
head_style	HEXAGON
head_height	0.188 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN
thread_class	3A A
thread_length	0.338 INCHES MINIMUM IN
shoulder_shape	ROUND FIRST SHOULDER
fastener_length	1.188 INCHES NOMINAL IN
hardness_rating	39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL
shoulder_length	0.750 INCHES NOMINAL FIRST SHOULDER IN
thread_direction	RIGHT-HAND
shoulder_diameter	0.3725 INCHES MINIMUM AND 0.3731 INCHES MAXIMUM FIRST SHOULDER IN
surface_treatment	CADMIUM OVERALL
NSN	5306-00-922-1473

COMPONENT DIAGRAM

KEY FEATURES

•

HEAD HEIGHT: 0.188 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN

•

FASTENER LENGTH: 1.188 INCHES NOMINAL IN

•

SHOULDER LENGTH: 0.750 INCHES NOMINAL FIRST SHOULDER IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-8837,TYPE 1,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL

•

SHOULDER DIAMETER: 0.3725 INCHES MINIMUM AND 0.3731 INCHES MAXIMUM FIRST SHOULDER IN

•

THREAD LENGTH: 0.338 INCHES MINIMUM IN

•

SHOULDER SHAPE: ROUND FIRST SHOULDER

•

HARDNESS RATING: 39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL

TECHNICAL CHARACTERISTICS

HEAD HEIGHT	0.188 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN
FASTENER LENGTH	1.188 INCHES NOMINAL IN
SHOULDER LENGTH	0.750 INCHES NOMINAL FIRST SHOULDER IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MIL-C-8837,TYPE 1,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SHOULDER DIAMETER	0.3725 INCHES MINIMUM AND 0.3731 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH	0.338 INCHES MINIMUM IN
SHOULDER SHAPE	ROUND FIRST SHOULDER
HARDNESS RATING	39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER	0.250 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

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

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FREQUENTLY ASKED QUESTIONS

What is A51B21651-11?

A51B21651-11 is a BOLT,SHOULDER.

What is the NSN for A51B21651-11?

A51B21651-11 is cataloged in the U.S. Government catalog under NSN 5306-00-922-1473. This indicates validated use in U.S. government and defense supply chains.

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A51B21651-11 — BOLT,SHOULDER

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