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BLT72 — BOLT,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

BLT72: BOLT,SHOULDER.

The BOLT,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, head_height: 0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 0.750 INCHES MINIMUM IN, shoulder_shape: ROUND FIRST SHOULDER. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-845-9958, 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
BLT72
NSN: 5306-00-845-9958
FSC: 5306 — Bolts
CAGE: 60532 — TRANE U.S. INC. DBA THE TRANE CO DIV TRANE HEADQUARTERS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN
thread_class2A A
thread_length0.750 INCHES MINIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length1.750 INCHES NOMINAL IN
hardness_rating23.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
shoulder_length0.677 INCHES MINIMUM AND 0.687 INCHES MAXIMUM FIRST SHOULDER IN
thread_directionRIGHT-HAND
shoulder_diameter0.3650 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM FIRST SHOULDER IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
NSN5306-00-845-9958
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: BLT72 · 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: 0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.750 INCHES NOMINAL IN
•
SHOULDER LENGTH: 0.677 INCHES MINIMUM AND 0.687 INCHES MAXIMUM FIRST SHOULDER IN
•
SHOULDER DIAMETER: 0.3650 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD LENGTH: 0.750 INCHES MINIMUM IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
HARDNESS RATING: 23.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE J429 GR 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN
FASTENER LENGTH1.750 INCHES NOMINAL IN
SHOULDER LENGTH0.677 INCHES MINIMUM AND 0.687 INCHES MAXIMUM FIRST SHOULDER IN
SHOULDER DIAMETER0.3650 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH0.750 INCHES MINIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
HARDNESS RATING23.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONSAE J429 GR 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.312 INCHES IN
HEAD STYLEHEXAGON
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 BLT72?
BLT72 is a BOLT,SHOULDER.
What is the NSN for BLT72?
BLT72 is cataloged in the U.S. Government catalog under NSN 5306-00-845-9958. 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.