A51B25564-13 — SCREW,SHOULDER

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

A51B25564-13: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4340 OVERALL, head_style: BEVEL-CONICAL, head_height: 0.625 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 1.045 INCHES NOMINAL IN, thread_length: 1.070 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-009-3973, 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

A51B25564-13

NSN: 5305-01-009-3973
FSC: 5305 — Screws
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)

SPECIFICATIONS

material	STEEL COMP 4340 OVERALL
head_style	BEVEL-CONICAL
head_height	0.625 INCHES NOMINAL IN
thread_class	3A A
head_diameter	1.045 INCHES NOMINAL IN
thread_length	1.070 INCHES NOMINAL IN
shoulder_shape	ROUND FIRST SHOULDER
fastener_length	2.060 INCHES NOMINAL IN
hardness_rating	39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL
shoulder_length	0.985 INCHES MINIMUM AND 0.995 INCHES MAXIMUM FIRST SHOULDER IN
thread_direction	RIGHT-HAND
shoulder_diameter	0.6150 INCHES MINIMUM AND 0.6156 INCHES MAXIMUM FIRST SHOULDER IN
NSN	5305-01-009-3973

COMPONENT DIAGRAM

KEY FEATURES

•

WIDTH ACROSS FLATS: 0.500 INCHES NOMINAL IN

•

HEAD HEIGHT: 0.625 INCHES NOMINAL IN

•

FASTENER LENGTH: 2.060 INCHES NOMINAL IN

•

SHOULDER LENGTH: 0.985 INCHES MINIMUM AND 0.995 INCHES MAXIMUM FIRST SHOULDER IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-8837 TY2 CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL

•

SHOULDER DIAMETER: 0.6150 INCHES MINIMUM AND 0.6156 INCHES MAXIMUM FIRST SHOULDER IN

•

THREAD LENGTH: 1.070 INCHES NOMINAL IN

•

SHOULDER SHAPE: ROUND FIRST SHOULDER

TECHNICAL CHARACTERISTICS

WIDTH ACROSS FLATS	0.500 INCHES NOMINAL IN
HEAD HEIGHT	0.625 INCHES NOMINAL IN
FASTENER LENGTH	2.060 INCHES NOMINAL IN
SHOULDER LENGTH	0.985 INCHES MINIMUM AND 0.995 INCHES MAXIMUM FIRST SHOULDER IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MIL-C-8837 TY2 CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SHOULDER DIAMETER	0.6150 INCHES MINIMUM AND 0.6156 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH	1.070 INCHES NOMINAL 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-8844,CLASS 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL

OTHER ITEMS IN FSC 5305 — Screws

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

5305-00-001-5016 5305-00-001-9160 5305-00-001-9629 5305-00-001-9742 5305-00-001-9768 5305-00-003-4306 5305-00-003-6694 5305-00-003-6753

SUBSTITUTES & CROSS-REFERENCES 1

A51B25618-11Reference 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 A51B25564-13?

A51B25564-13 is a SCREW,SHOULDER.

What parts can replace A51B25564-13?

There is 1 known substitute for A51B25564-13: A51B25618-11. Substitute compatibility should be verified for your specific system.

What is the NSN for A51B25564-13?

A51B25564-13 is cataloged in the U.S. Government catalog under NSN 5305-01-009-3973. This indicates validated use in U.S. government and defense supply chains.

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