51B581-7-14H — SCREW,CLOSE TOLERANCE

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

51B581-7-14H: SCREW,CLOSE TOLERANCE.

The SCREW,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: STEEL COMP E4340 OR STEEL COMP 4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OVERALL, head_style: FLAT COUNTERSUNK, grip_length: 0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.4360 INCHES MINIMUM AND 0.4370 INCHES MAXIMUM IN, head_diameter: 0.662 INCHES MINIMUM AND 0.668 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-048-6098, 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

51B581-7-14H

NSN: 5305-01-048-6098
FSC: 5305 — Screws
CAGE: 79U29 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)

SPECIFICATIONS

material	STEEL COMP E4340 OR STEEL COMP 4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OVERALL
head_style	FLAT COUNTERSUNK
grip_length	0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN
thread_class	3A A
grip_diameter	0.4360 INCHES MINIMUM AND 0.4370 INCHES MAXIMUM IN
head_diameter	0.662 INCHES MINIMUM AND 0.668 INCHES MAXIMUM IN
thread_length	0.427 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN
surface_finish	32.0 MICROINCHES GRIP
fastener_length	1.312 INCHES MINIMUM AND 1.359 INCHES MAXIMUM IN
hardness_rating	39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
thread_direction	RIGHT-HAND
countersink_angle	100.0 DEGREES NOMINAL
NSN	5305-01-048-6098

COMPONENT DIAGRAM

KEY FEATURES

•

SURFACE FINISH: 32.0 MICROINCHES GRIP

•

FASTENER LENGTH: 1.312 INCHES MINIMUM AND 1.359 INCHES MAXIMUM IN

•

THREAD LENGTH: 0.427 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN

•

HARDNESS RATING: 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL

•

SHANK UNTHREADED HOLE DIAMETER: 0.096 INCHES MINIMUM AND 0.116 INCHES MAXIMUM FIRST HOLE IN

•

NOMINAL THREAD DIAMETER: 0.438 INCHES IN

•

HEAD STYLE: FLAT COUNTERSUNK

•

THREAD DIRECTION: RIGHT-HAND

TECHNICAL CHARACTERISTICS

SURFACE FINISH	32.0 MICROINCHES GRIP
FASTENER LENGTH	1.312 INCHES MINIMUM AND 1.359 INCHES MAXIMUM IN
THREAD LENGTH	0.427 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN
HARDNESS RATING	39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
SHANK UNTHREADED HOLE DIAMETER	0.096 INCHES MINIMUM AND 0.116 INCHES MAXIMUM FIRST HOLE IN
NOMINAL THREAD DIAMETER	0.438 INCHES IN
HEAD STYLE	FLAT COUNTERSUNK
THREAD DIRECTION	RIGHT-HAND
SPECIFICATION/STANDARD DATA	76823-51B58 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
GRIP LENGTH	0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN

OTHER ITEMS IN FSC 5305 — Screws

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831

SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 51B581-7-14H?

51B581-7-14H is a SCREW,CLOSE TOLERANCE.

What is the NSN for 51B581-7-14H?

51B581-7-14H is cataloged in the U.S. Government catalog under NSN 5305-01-048-6098. This indicates validated use in U.S. government and defense supply chains.

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