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2178496 — BOLT,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

2178496: BOLT,SHOULDER.

The BOLT,SHOULDER is a the manufacturer industrial component. Key specifications include material: IRON ALLOY 660 OVERALL, hole_type: DRILLED, head_style: DOUBLE HEXAGON W/HOLE, head_height: 0.293 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN, hole_diameter: 0.060 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN, thread_length: 0.495 INCHES MINIMUM AND 0.525 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-138-6288, 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
2178496
NSN: 5306-01-138-6288
FSC: 5306 — Bolts
CAGE: 92215 — HOWMET GLOBAL FASTENING SYSTEMS INC DIV TORRANCE OPERATIONS (USA)
SPECIFICATIONS
materialIRON ALLOY 660 OVERALL
hole_typeDRILLED
head_styleDOUBLE HEXAGON W/HOLE
head_height0.293 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN
hole_diameter0.060 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
hole_quantity4
thread_length0.495 INCHES MINIMUM AND 0.525 INCHES MAXIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length0.835 INCHES MINIMUM AND 0.855 INCHES MAXIMUM IN
shoulder_length0.330 INCHES MINIMUM AND 0.340 INCHES MAXIMUM FIRST SHOULDER IN
thread_directionRIGHT-HAND
shoulder_diameter0.2510 INCHES MINIMUM AND 0.2520 INCHES MAXIMUM FIRST SHOULDER IN
NSN5306-01-138-6288
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 2178496 · 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
•
EXTENDED WASHER THICKNESS: 0.060 INCHES MINIMUM IN
•
HEAD HEIGHT: 0.293 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.835 INCHES MINIMUM AND 0.855 INCHES MAXIMUM IN
•
SHOULDER LENGTH: 0.330 INCHES MINIMUM AND 0.340 INCHES MAXIMUM FIRST SHOULDER IN
•
EXTENDED WASHER DIAMETER: 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
•
SHOULDER DIAMETER: 0.2510 INCHES MINIMUM AND 0.2520 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD LENGTH: 0.495 INCHES MINIMUM AND 0.525 INCHES MAXIMUM IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.060 INCHES MINIMUM IN
HEAD HEIGHT0.293 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN
FASTENER LENGTH0.835 INCHES MINIMUM AND 0.855 INCHES MAXIMUM IN
SHOULDER LENGTH0.330 INCHES MINIMUM AND 0.340 INCHES MAXIMUM FIRST SHOULDER IN
EXTENDED WASHER DIAMETER0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
SHOULDER DIAMETER0.2510 INCHES MINIMUM AND 0.2520 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH0.495 INCHES MINIMUM AND 0.525 INCHES MAXIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
HOLE CONFIGURATION STYLEDOUBLE HEXAGON LONGITUDINAL HOLE
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
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 2178496?
2178496 is a BOLT,SHOULDER.
What is the NSN for 2178496?
2178496 is cataloged in the U.S. Government catalog under NSN 5306-01-138-6288. 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.