A51B21645-11 — BOLT,SHOULDER

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

A51B21645-11: BOLT,SHOULDER.

The BOLT,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL COMP D6AC OVERALL, head_style: HEXAGON, head_height: 0.210 INCHES NOMINAL IN, thread_class: 3A A, thread_length: 0.405 INCHES MINIMUM AND 0.415 INCHES MAXIMUM IN, shoulder_shape: ROUND FIRST SHOULDER. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-973-5594, 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

A51B21645-11

NSN: 5306-00-973-5594
FSC: 5306 — Bolts
CAGE: 79RG9 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)

SPECIFICATIONS

material	STEEL COMP D6AC OVERALL
head_style	HEXAGON
head_height	0.210 INCHES NOMINAL IN
thread_class	3A A
thread_length	0.405 INCHES MINIMUM AND 0.415 INCHES MAXIMUM IN
shoulder_shape	ROUND FIRST SHOULDER
fastener_length	1.289 INCHES NOMINAL IN
hardness_rating	46.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM OVERALL
shoulder_length	0.874 INCHES MINIMUM AND 0.884 INCHES MAXIMUM FIRST SHOULDER IN
thread_direction	RIGHT-HAND
shoulder_diameter	0.3733 INCHES MINIMUM AND 0.3742 INCHES MAXIMUM FIRST SHOULDER IN
surface_treatment	CADMIUM OVERALL
NSN	5306-00-973-5594

COMPONENT DIAGRAM

KEY FEATURES

•

HEAD HEIGHT: 0.210 INCHES NOMINAL IN

•

FASTENER LENGTH: 1.289 INCHES NOMINAL IN

•

SHOULDER LENGTH: 0.874 INCHES MINIMUM AND 0.884 INCHES MAXIMUM FIRST SHOULDER IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-8837,TY 2 CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL

•

SHOULDER DIAMETER: 0.3733 INCHES MINIMUM AND 0.3742 INCHES MAXIMUM FIRST SHOULDER IN

•

THREAD LENGTH: 0.405 INCHES MINIMUM AND 0.415 INCHES MAXIMUM IN

•

SHOULDER SHAPE: ROUND FIRST SHOULDER

•

HARDNESS RATING: 46.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM OVERALL

TECHNICAL CHARACTERISTICS

HEAD HEIGHT	0.210 INCHES NOMINAL IN
FASTENER LENGTH	1.289 INCHES NOMINAL IN
SHOULDER LENGTH	0.874 INCHES MINIMUM AND 0.884 INCHES MAXIMUM FIRST SHOULDER IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MIL-C-8837,TY 2 CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SHOULDER DIAMETER	0.3733 INCHES MINIMUM AND 0.3742 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH	0.405 INCHES MINIMUM AND 0.415 INCHES MAXIMUM IN
SHOULDER SHAPE	ROUND FIRST SHOULDER
HARDNESS RATING	46.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM OVERALL
NOMINAL THREAD DIAMETER	0.250 INCHES IN
HEAD STYLE	HEXAGON

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 A51B21645-11?

A51B21645-11 is a BOLT,SHOULDER.

What is the NSN for A51B21645-11?

A51B21645-11 is cataloged in the U.S. Government catalog under NSN 5306-00-973-5594. This indicates validated use in U.S. government and defense supply chains.

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A51B21645-11 — BOLT,SHOULDER

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