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BLT4 — TUBE,METALLIC

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

BLT4: TUBE,METALLIC.

The TUBE,METALLIC is a the manufacturer industrial component. Key specifications include diameter: 0.250 INCHES NOMINAL IN, material: STEEL, head_style: ROUND W/WRENCH FLATS, head_height: 0.500 INCHES NOMINAL IN, construction: SEAMLESS, thread_class: 2A A. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-349-6735, 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
BLT4
NSN: 5306-00-349-6735
NIINs: 003496735, 013894156
FSC: 5306 — Bolts
CAGE: 830Q4 — CURTISS-WRIGHT ELECTRO-MECHANICAL CORPORATION DBA CURTISS-WRIGHT STEAM AND AIR SOLUTIONS DIV STEAM AND AIR SOLUTIONS (USA)
SPECIFICATIONS
diameter0.250 INCHES NOMINAL IN
materialSTEEL
head_styleROUND W/WRENCH FLATS
head_height0.500 INCHES NOMINAL IN
constructionSEAMLESS
thread_class2A A
head_diameter0.812 INCHES NOMINAL IN
thread_length0.875 INCHES NOMINAL IN
wall_thickness0.028 INCHES NOMINAL IN
fastener_length4.688 INCHES NOMINAL IN
first_end_stylePLAIN
special_featuresW/ONE NUT AND COTTER PIN
NSN5306-00-349-6735
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: BLT4 · 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: 0.500 INCHES NOMINAL IN
•
FASTENER LENGTH: 4.688 INCHES NOMINAL IN
•
THREAD LENGTH: 0.875 INCHES NOMINAL IN
•
SHANK UNTHREADED HOLE DIAMETER: 0.125 INCHES NOMINAL FIRST HOLE IN
•
NOMINAL THREAD DIAMETER: 0.500 INCHES IN
•
HEAD STYLE: ROUND W/WRENCH FLATS
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 0.625 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.500 INCHES NOMINAL IN
FASTENER LENGTH4.688 INCHES NOMINAL IN
THREAD LENGTH0.875 INCHES NOMINAL IN
SHANK UNTHREADED HOLE DIAMETER0.125 INCHES NOMINAL FIRST HOLE IN
NOMINAL THREAD DIAMETER0.500 INCHES IN
HEAD STYLEROUND W/WRENCH FLATS
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.625 INCHES NOMINAL IN
SPECIAL FEATURESW/ONE NUT AND COTTER PIN
THREAD CLASS2A A
SUBSTITUTES & CROSS-REFERENCES 1
232NReference 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 BLT4?
BLT4 is a TUBE,METALLIC.
What parts can replace BLT4?
There is 1 known substitute for BLT4: 232N. Substitute compatibility should be verified for your specific system.
What is the NSN for BLT4?
BLT4 is cataloged in the U.S. Government catalog under NSN 5306-00-349-6735. 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.