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378SS20 — SCREW,EXTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

378SS20: SCREW,EXTERNALLY RELIEVED BODY.

The SCREW,EXTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, head_style: KNURLED NO. 5, head_height: 0.313 INCHES NOMINAL IN, point_style: CONE, thread_class: 2A A, head_diameter: 0.313 INCHES NOMINAL IN.

This part is cataloged in the U.S. Government catalog under NSN 5305-01-535-0031, 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
378SS20
NSN: 5305-01-535-0031
FSC: 5305 — Screws
CAGE: 55566 — MATTHEW WARREN, INC DBA RAF ELECTRONIC HARDWARE DIV RAF ELECTRONIC HARDWARE, LLC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
head_styleKNURLED NO. 5
head_height0.313 INCHES NOMINAL IN
point_styleCONE
thread_class2A A
head_diameter0.313 INCHES NOMINAL IN
thread_length0.125 INCHES NOMINAL IN
fastener_length0.375 INCHES NOMINAL IN
special_featuresNON MAGNETIC
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
point_chamfer_angle90.0 DEGREES NOMINAL
NSN5305-01-535-0031
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 378SS20 · 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: 0.313 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.375 INCHES NOMINAL IN
•
THREAD LENGTH: 0.125 INCHES NOMINAL IN
•
POINT CHAMFER ANGLE: 90.0 DEGREES NOMINAL
•
NOMINAL THREAD DIAMETER: 0.209 INCHES IN
•
HEAD STYLE: KNURLED NO. 5
•
THREAD DIRECTION: RIGHT-HAND
•
POINT STYLE: CONE
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.313 INCHES NOMINAL IN
FASTENER LENGTH0.375 INCHES NOMINAL IN
THREAD LENGTH0.125 INCHES NOMINAL IN
POINT CHAMFER ANGLE90.0 DEGREES NOMINAL
NOMINAL THREAD DIAMETER0.209 INCHES IN
HEAD STYLEKNURLED NO. 5
THREAD DIRECTIONRIGHT-HAND
POINT STYLECONE
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY1
COLORNATURAL OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
13010011Reference document
Same NSN cross-reference
Reference document — Vendor item drawing 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 378SS20?
378SS20 is a SCREW,EXTERNALLY RELIEVED BODY.
What parts can replace 378SS20?
There is 1 known substitute for 378SS20: 13010011. Substitute compatibility should be verified for your specific system.
What is the NSN for 378SS20?
378SS20 is cataloged in the U.S. Government catalog under NSN 5305-01-535-0031. 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.