GS551P4-561 — SCREW,SHOULDER

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

GS551P4-561: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4037 OVERALL, head_style: FLAT COUNTERSUNK, thread_class: 2A A, head_diameter: 0.357 INCHES NOMINAL IN, thread_length: 0.391 INCHES MINIMUM AND 0.421 INCHES MAXIMUM IN, shoulder_shape: ROUND FIRST SHOULDER. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-151-8655, 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

GS551P4-561

NSN: 5305-00-151-8655
FSC: 5305 — Screws
CAGE: 27624 — SPS TECHNOLOGIES LLC DBA PB FASTENERS DIV PB FASTENERS (USA)

SPECIFICATIONS

material	STEEL COMP 4037 OVERALL
head_style	FLAT COUNTERSUNK
thread_class	2A A
head_diameter	0.357 INCHES NOMINAL IN
thread_length	0.391 INCHES MINIMUM AND 0.421 INCHES MAXIMUM IN
shoulder_shape	ROUND FIRST SHOULDER
fastener_length	0.891 INCHES MINIMUM AND 0.921 INCHES MAXIMUM IN
shoulder_length	0.436 INCHES MINIMUM AND 0.466 INCHES MAXIMUM FIRST SHOULDER IN
special_features	FULL SURFACE OF HEAD PAINTED MAROON
thread_direction	RIGHT-HAND
countersink_angle	99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
shoulder_diameter	0.254 INCHES MINIMUM AND 0.256 INCHES MAXIMUM FIRST SHOULDER IN
NSN	5305-00-151-8655

COMPONENT DIAGRAM

KEY FEATURES

•

FASTENER LENGTH: 0.891 INCHES MINIMUM AND 0.921 INCHES MAXIMUM IN

•

SHOULDER LENGTH: 0.436 INCHES MINIMUM AND 0.466 INCHES MAXIMUM FIRST SHOULDER IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL

•

SHOULDER DIAMETER: 0.254 INCHES MINIMUM AND 0.256 INCHES MAXIMUM FIRST SHOULDER IN

•

THREAD LENGTH: 0.391 INCHES MINIMUM AND 0.421 INCHES MAXIMUM IN

•

SHOULDER SHAPE: ROUND FIRST SHOULDER

•

NOMINAL THREAD DIAMETER: 0.250 INCHES IN

•

HEAD STYLE: FLAT COUNTERSUNK

TECHNICAL CHARACTERISTICS

FASTENER LENGTH	0.891 INCHES MINIMUM AND 0.921 INCHES MAXIMUM IN
SHOULDER LENGTH	0.436 INCHES MINIMUM AND 0.466 INCHES MAXIMUM FIRST SHOULDER IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SHOULDER DIAMETER	0.254 INCHES MINIMUM AND 0.256 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH	0.391 INCHES MINIMUM AND 0.421 INCHES MAXIMUM IN
SHOULDER SHAPE	ROUND FIRST SHOULDER
NOMINAL THREAD DIAMETER	0.250 INCHES IN
HEAD STYLE	FLAT COUNTERSUNK
THREAD DIRECTION	RIGHT-HAND
SPECIAL FEATURES	FULL SURFACE OF HEAD PAINTED MAROON

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 1

2R1465-7Reference document

Same NSN cross-reference

Reference document — Secondary reference

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 GS551P4-561?

GS551P4-561 is a SCREW,SHOULDER.

What parts can replace GS551P4-561?

There is 1 known substitute for GS551P4-561: 2R1465-7. Substitute compatibility should be verified for your specific system.

What is the NSN for GS551P4-561?

GS551P4-561 is cataloged in the U.S. Government catalog under NSN 5305-00-151-8655. This indicates validated use in U.S. government and defense supply chains.

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