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Technical Data Sheet
PartsTable / COMPONENT / UNBRAKO1/4UNC3/8-D
UNBRAKO1/4UNC3/8-D ✓ 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 UNBRAKO1/4UNC3/8-D is a the manufacturer industrial component. The unit ships in a 2U form factor suitable for standard rack-mount installations. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-058-9379, 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
2U BAY→ UNBRAKO1/4UNC3/8-D
NSN: 5305-00-058-9379
FSC: 5305
CAGE: Z1657 — UNBRAKO DEEPAK FASTENERS ( AUSTRALIA) P/L (AUS)
SPECIFICATIONS
Part NumberUNBRAKO1/4UNC3/8-D
Form Factor2U
NSN5305-00-058-9379
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: UNBRAKO1/4UNC3/8-D · 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
•
2U Form Factor
•
POINT STYLE: HALF DOG
•
THREAD CLASS: 3A A
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
•
THREAD LENGTH: 0.375 INCHES MAXIMUM IN
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH ACROSS FLATS: 0.125 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.375 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 8630 OR STEEL COMP 8740 OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
POINT STYLEHALF DOG
THREAD CLASS3A A
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
THREAD LENGTH0.375 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
WIDTH ACROSS FLATS0.125 INCHES NOMINAL IN
FASTENER LENGTH0.375 INCHES NOMINAL IN
MATERIALSTEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 8630 OR STEEL COMP 8740 OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
WWP460CLASSAInterchangeable
interchangeable cross-reference
interchangeable
MIL-F-1184TYPE1Interchangeable
interchangeable cross-reference
interchangeable
MS14305-3YAInterchangeable
interchangeable cross-reference
interchangeable
3950X4Interchangeable
interchangeable cross-reference
interchangeable
MILF1184TYE1Interchangeable
interchangeable cross-reference
interchangeable
901110-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is UNBRAKO1/4UNC3/8-D?
UNBRAKO1/4UNC3/8-D is a UNBRAKO1/4UNC3/8-D.
What parts can replace UNBRAKO1/4UNC3/8-D?
There are 10 known substitutes for UNBRAKO1/4UNC3/8-D: WWP460CLASSA, MIL-F-1184TYPE1, MS14305-3YA and 7 more. Substitute compatibility should be verified for your specific system.
Is UNBRAKO1/4UNC3/8-D still available?
UNBRAKO1/4UNC3/8-D is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026