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GS550E3S7 — SCREW,CAP,SOCKET HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

GS550E3S7: SCREW,CAP,SOCKET HEAD.

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4037 OR STEEL COMP 8630 OVERALL, head_style: ROUND EXTENDED WASHER, head_height: 0.089 INCHES MINIMUM AND 0.099 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN, thread_length: 0.329 INCHES MINIMUM AND 0.423 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-042-4415, 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
GS550E3S7
NSN: 5305-01-042-4415
FSC: 5305 — Screws
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP 4037 OR STEEL COMP 8630 OVERALL
head_styleROUND EXTENDED WASHER
head_height0.089 INCHES MINIMUM AND 0.099 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
thread_length0.329 INCHES MINIMUM AND 0.423 INCHES MAXIMUM IN
fastener_length0.407 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
locking_featurePATCH THREADS
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OR CADMIUM AND CHROMATE OR CADMIUM AND PHOSPHATE OR ZINC OR ZINC AND CHROMATE OR ZINC AND PHOSPHATE OVERALL
internal_drive_styleSLOT
nominal_thread_diameter0.190 INCHES IN
NSN5305-01-042-4415
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: GS550E3S7 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
EXTENDED WASHER THICKNESS: 0.025 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.089 INCHES MINIMUM AND 0.099 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.407 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
•
EXTENDED WASHER DIAMETER: 0.427 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.329 INCHES MINIMUM AND 0.423 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
HEAD STYLE: ROUND EXTENDED WASHER
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.025 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN
HEAD HEIGHT0.089 INCHES MINIMUM AND 0.099 INCHES MAXIMUM IN
FASTENER LENGTH0.407 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
EXTENDED WASHER DIAMETER0.427 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN
THREAD LENGTH0.329 INCHES MINIMUM AND 0.423 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLEROUND EXTENDED WASHER
THREAD DIRECTIONRIGHT-HAND
LOCKING FEATUREPATCH THREADS
SURFACE TREATMENTCADMIUM OR CADMIUM AND CHROMATE OR CADMIUM AND PHOSPHATE OR ZINC OR ZINC AND CHROMATE OR ZINC AND PHOSPHATE 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

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 GS550E3S7?
GS550E3S7 is a SCREW,CAP,SOCKET HEAD.
What is the NSN for GS550E3S7?
GS550E3S7 is cataloged in the U.S. Government catalog under NSN 5305-01-042-4415. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.