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GS550BJ2 — SCREW,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

GS550BJ2: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: ROOF, head_height: 0.145 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.357 INCHES MINIMUM AND 0.373 INCHES MAXIMUM IN, thread_length: 0.190 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-477-4130, 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
GS550BJ2
NSN: 5305-01-477-4130
FSC: 5305 — Screws
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleROOF
head_height0.145 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.357 INCHES MINIMUM AND 0.373 INCHES MAXIMUM IN
thread_length0.190 INCHES NOMINAL IN
shoulder_shapeROUND OVERALL
fastener_length0.553 INCHES MINIMUM AND 0.583 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
internal_drive_styleCROSS RECESS TYPE III
end_item_identificationE2C HAWKEYE AIRCRAFT
NSN5305-01-477-4130
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: GS550BJ2 · 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: 0.145 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.553 INCHES MINIMUM AND 0.583 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 TYPE 11,CLASS 2 FED SPEC 1ST TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.190 INCHES NOMINAL IN
•
SHOULDER SHAPE: ROUND OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-7839 MIL SPEC ALL MATERIAL RESPONSES OR MIL-S-6049 MIL SPEC ALL MATERIAL RESPONSES OVERALL
•
HEAD STYLE: ROOF
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.145 INCHES MAXIMUM IN
FASTENER LENGTH0.553 INCHES MINIMUM AND 0.583 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 TYPE 11,CLASS 2 FED SPEC 1ST TREATMENT RESPONSE OVERALL
THREAD LENGTH0.190 INCHES NOMINAL IN
SHOULDER SHAPEROUND OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-7839 MIL SPEC ALL MATERIAL RESPONSES OR MIL-S-6049 MIL SPEC ALL MATERIAL RESPONSES OVERALL
HEAD STYLEROOF
THREAD DIRECTIONRIGHT-HAND
SURFACE TREATMENTCADMIUM OVERALL
INTERNAL DRIVE STYLECROSS RECESS TYPE III
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 2
BM21010-3-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
2R1864-2Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is GS550BJ2?
GS550BJ2 is a SCREW,SHOULDER.
What parts can replace GS550BJ2?
There are 2 known substitutes for GS550BJ2: BM21010-3-4, 2R1864-2. Substitute compatibility should be verified for your specific system.
What is the NSN for GS550BJ2?
GS550BJ2 is cataloged in the U.S. Government catalog under NSN 5305-01-477-4130. 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.