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PIL551C3-368 — SCREW,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

PIL551C3-368: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4037 OR STEEL COMP 8740 OVERALL, head_style: FLAT COUNTERSUNK, thread_class: 2A A, head_diameter: 0.266 INCHES MINIMUM AND 0.286 INCHES MAXIMUM IN, thread_length: 0.285 INCHES MINIMUM AND 0.345 INCHES MAXIMUM IN, shoulder_shape: ROUND FIRST SHOULDER. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-515-7044, 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
PIL551C3-368
NSN: 5305-00-515-7044
FSC: 5305 — Screws
CAGE: 47253 — PILGRIM SCREW CORPORATION DBA PILGRIM AEROSPACE FASTENERS (USA)
SPECIFICATIONS
materialSTEEL COMP 4037 OR STEEL COMP 8740 OVERALL
head_styleFLAT COUNTERSUNK
thread_class2A A
head_diameter0.266 INCHES MINIMUM AND 0.286 INCHES MAXIMUM IN
thread_length0.285 INCHES MINIMUM AND 0.345 INCHES MAXIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length0.610 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN
shoulder_length0.255 INCHES MINIMUM AND 0.285 INCHES MAXIMUM FIRST SHOULDER IN
special_featuresHEAD PAINTED RED
thread_directionRIGHT-HAND
countersink_angle99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
shoulder_diameter0.193 INCHES MINIMUM AND 0.195 INCHES MAXIMUM FIRST SHOULDER IN
NSN5305-00-515-7044
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: PIL551C3-368 · 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
•
FASTENER LENGTH: 0.610 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN
•
SHOULDER LENGTH: 0.255 INCHES MINIMUM AND 0.285 INCHES MAXIMUM FIRST SHOULDER IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
SHOULDER DIAMETER: 0.193 INCHES MINIMUM AND 0.195 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD LENGTH: 0.285 INCHES MINIMUM AND 0.345 INCHES MAXIMUM IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
HEAD STYLE: FLAT COUNTERSUNK
TECHNICAL CHARACTERISTICS
FASTENER LENGTH0.610 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN
SHOULDER LENGTH0.255 INCHES MINIMUM AND 0.285 INCHES MAXIMUM FIRST SHOULDER IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SHOULDER DIAMETER0.193 INCHES MINIMUM AND 0.195 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH0.285 INCHES MINIMUM AND 0.345 INCHES MAXIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLEFLAT COUNTERSUNK
THREAD DIRECTIONRIGHT-HAND
SPECIAL FEATURESHEAD PAINTED RED
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 3
GS551C3-368Reference document
Same NSN cross-reference
Reference document — Secondary reference
S100C3-368Reference document
Same NSN cross-reference
Reference document — Secondary reference
B1990-2Reference 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 PIL551C3-368?
PIL551C3-368 is a SCREW,SHOULDER.
What parts can replace PIL551C3-368?
There are 3 known substitutes for PIL551C3-368: GS551C3-368, S100C3-368, B1990-2. Substitute compatibility should be verified for your specific system.
What is the NSN for PIL551C3-368?
PIL551C3-368 is cataloged in the U.S. Government catalog under NSN 5305-00-515-7044. 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.