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SPS50644-23 — BOLT,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

SPS50644-23: BOLT,SHOULDER.

The BOLT,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, head_height: 0.609 INCHES MINIMUM AND 0.641 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.841 INCHES MINIMUM AND 0.861 INCHES MAXIMUM IN, shoulder_shape: ROUND FIRST SHOULDER. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-671-6516, 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
SPS50644-23
NSN: 5306-00-671-6516
FSC: 5306 — Bolts
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height0.609 INCHES MINIMUM AND 0.641 INCHES MAXIMUM IN
thread_class3A A
thread_length0.841 INCHES MINIMUM AND 0.861 INCHES MAXIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length4.820 INCHES MINIMUM AND 4.867 INCHES MAXIMUM IN
shoulder_length3.844 INCHES MINIMUM AND 3.891 INCHES MAXIMUM FIRST SHOULDER IN
special_featuresTHD RELIEF 0.125 IN. W IN
thread_directionRIGHT-HAND
shoulder_diameter1.4355 INCHES MINIMUM AND 1.4365 INCHES MAXIMUM FIRST SHOULDER IN
surface_treatmentCADMIUM OVERALL
NSN5306-00-671-6516
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: SPS50644-23 · 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: 0.609 INCHES MINIMUM AND 0.641 INCHES MAXIMUM IN
•
FASTENER LENGTH: 4.820 INCHES MINIMUM AND 4.867 INCHES MAXIMUM IN
•
SHOULDER LENGTH: 3.844 INCHES MINIMUM AND 3.891 INCHES MAXIMUM FIRST SHOULDER IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
SHOULDER DIAMETER: 1.4355 INCHES MINIMUM AND 1.4365 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD LENGTH: 0.841 INCHES MINIMUM AND 0.861 INCHES MAXIMUM IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
SHANK UNTHREADED HOLE DIAMETER: 0.131 INCHES MINIMUM AND 0.157 INCHES MAXIMUM FIRST HOLE IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.609 INCHES MINIMUM AND 0.641 INCHES MAXIMUM IN
FASTENER LENGTH4.820 INCHES MINIMUM AND 4.867 INCHES MAXIMUM IN
SHOULDER LENGTH3.844 INCHES MINIMUM AND 3.891 INCHES MAXIMUM FIRST SHOULDER IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SHOULDER DIAMETER1.4355 INCHES MINIMUM AND 1.4365 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH0.841 INCHES MINIMUM AND 0.861 INCHES MAXIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
SHANK UNTHREADED HOLE DIAMETER0.131 INCHES MINIMUM AND 0.157 INCHES MAXIMUM FIRST HOLE IN
NOMINAL THREAD DIAMETER1.125 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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is SPS50644-23?
SPS50644-23 is a BOLT,SHOULDER.
What is the NSN for SPS50644-23?
SPS50644-23 is cataloged in the U.S. Government catalog under NSN 5306-00-671-6516. 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.