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GS550B3S6 — SCREW,CAP,SOCKET HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

GS550B3S6: SCREW,CAP,SOCKET HEAD.

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: STEEL COMP 8630 OR STEEL COMP 4037 OVERALL, head_style: FILLISTER, head_height: 0.118 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.292 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN, thread_length: 0.219 INCHES MINIMUM AND 0.344 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-170-2944, 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
GS550B3S6
NSN: 5305-00-170-2944
FSC: 5305 — Screws
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP 8630 OR STEEL COMP 4037 OVERALL
head_styleFILLISTER
head_height0.118 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.292 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN
thread_length0.219 INCHES MINIMUM AND 0.344 INCHES MAXIMUM IN
fastener_length0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
locking_featurePELLET THREADS
special_featuresHOLE DRILLED IN HEAD 0.048 IN. NOM DIA IN
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
internal_drive_styleSLOT
NSN5305-00-170-2944
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: GS550B3S6 · 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
•
HEAD HEIGHT: 0.118 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.219 INCHES MINIMUM AND 0.344 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-6050 FED SPEC 1ST MATERIAL RESPONSE OR AMS 6300 ASSN STD 2ND MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
HEAD STYLE: FILLISTER
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.118 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
FASTENER LENGTH0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.219 INCHES MINIMUM AND 0.344 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6050 FED SPEC 1ST MATERIAL RESPONSE OR AMS 6300 ASSN STD 2ND MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLEFILLISTER
THREAD DIRECTIONRIGHT-HAND
LOCKING FEATUREPELLET THREADS
SPECIAL FEATURESHOLE DRILLED IN HEAD 0.048 IN. NOM DIA IN
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 GS550B3S6?
GS550B3S6 is a SCREW,CAP,SOCKET HEAD.
What is the NSN for GS550B3S6?
GS550B3S6 is cataloged in the U.S. Government catalog under NSN 5305-00-170-2944. 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.