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Technical Data Sheet
PartsTable / COMPONENT / 6303509-001
6303509-001 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include color: BLACK FASTENER, material: PLASTIC POLYAMIDE NYLON LOCKING FEATURE, head_style: FLAT CHAMFER, head_height: 0.243 INCHES MINIMUM AND 0.248 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.562 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-371-7166, 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
6303509-001
NSN: 5305-01-371-7166
FSC: 5305
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
colorBLACK FASTENER
materialPLASTIC POLYAMIDE NYLON LOCKING FEATURE
head_styleFLAT CHAMFER
head_height0.243 INCHES MINIMUM AND 0.248 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.562 INCHES NOMINAL IN
thread_length0.500 INCHES MAXIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length0.752 INCHES MINIMUM AND 0.757 INCHES MAXIMUM IN
hardness_rating38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM FASTENER
locking_featurePATCH THREADS
shoulder_length0.257 INCHES MINIMUM AND 0.257 INCHES MAXIMUM FIRST SHOULDER IN
NSN5305-01-371-7166
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 6303509-001 · 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: 0.752 INCHES MINIMUM AND 0.757 INCHES MAXIMUM IN
•
WIDTH ACROSS FLATS: 0.188 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
•
HARDNESS RATING: 38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM FASTENER
•
THREAD QUANTITY PER INCH: 18
•
LOCKING FEATURE: PATCH THREADS
•
MATERIAL DOCUMENT AND CLASSIFICATION: AISI 4140 ASSN STD SINGLE MATERIAL RESPONSE FASTENER
•
SHOULDER DIAMETER: 0.373 INCHES MINIMUM AND 0.374 INCHES MAXIMUM FIRST SHOULDER IN
•
SURFACE TREATMENT: OXIDE FASTENER
TECHNICAL CHARACTERISTICS (FLIS)
FASTENER LENGTH0.752 INCHES MINIMUM AND 0.757 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.188 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
HARDNESS RATING38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM FASTENER
THREAD QUANTITY PER INCH18
LOCKING FEATUREPATCH THREADS
MATERIAL DOCUMENT AND CLASSIFICATIONAISI 4140 ASSN STD SINGLE MATERIAL RESPONSE FASTENER
SHOULDER DIAMETER0.373 INCHES MINIMUM AND 0.374 INCHES MAXIMUM FIRST SHOULDER IN
SURFACE TREATMENTOXIDE FASTENER
COLORBLACK FASTENER
SHOULDER SHAPEROUND FIRST SHOULDER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
1197109Interchangeable
interchangeable cross-reference
interchangeable
41-707Interchangeable
interchangeable cross-reference
interchangeable
AR56786Interchangeable
interchangeable cross-reference
interchangeable
AR41707Interchangeable
interchangeable cross-reference
interchangeable
18491Interchangeable
interchangeable cross-reference
interchangeable
10132768Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6303509-001?
6303509-001 is a SCREW,SHOULDER.
What parts can replace 6303509-001?
There are 11 known substitutes for 6303509-001: 1197109, 41-707, AR56786 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 6303509-001?
6303509-001 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-371-7166. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026