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872640 — STUD,POSITIVE LOCK

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

872640: STUD,POSITIVE LOCK.

The STUD,POSITIVE LOCK is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, head_diameter: 0.313 INCHES NOMINAL IN, shoulder_height: 0.186 INCHES NOMINAL IN, undercut_length: 0.031 INCHES NOMINAL IN, undercut_diameter: 0.288 INCHES NOMINAL IN, end_overall_length: 0.612 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-202-1579, 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
872640
NSN: 5325-00-202-1579
FSC: 5325 — Fastening Devices
CAGE: 56232 — LOCKHEED MARTIN CORPORATION DIV RMS - MITCHEL FIELD (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
head_diameter0.313 INCHES NOMINAL IN
shoulder_height0.186 INCHES NOMINAL IN
undercut_length0.031 INCHES NOMINAL IN
undercut_diameter0.288 INCHES NOMINAL IN
end_overall_length0.612 INCHES NOMINAL IN
shank_major_diameter0.312 INCHES NOMINAL IN
major_diameter_length0.262 INCHES NOMINAL IN
stud_shank_hole_depth0.312 INCHES NOMINAL IN
stud_shank_hole_diameter0.187 INCHES NOMINAL IN
stud_shank_overall_height0.356 INCHES NOMINAL IN
positive_lock_stud_head_styleSTUD HEAD
NSN5325-00-202-1579
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 872640 · 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
•
UNDERCUT LENGTH: 0.031 INCHES NOMINAL IN
•
UNDERCUT DIAMETER: 0.288 INCHES NOMINAL IN
•
POSITIVE LOCK STUD SHANK STYLE: STUD SHANK
•
MAJOR DIAMETER LENGTH: 0.262 INCHES NOMINAL IN
•
SHOULDER HEIGHT: 0.186 INCHES NOMINAL IN
•
STUD SHANK HOLE DEPTH: 0.312 INCHES NOMINAL IN
•
END OVERALL LENGTH: 0.612 INCHES NOMINAL IN
•
STUD SHANK HOLE DIAMETER: 0.187 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
UNDERCUT LENGTH0.031 INCHES NOMINAL IN
UNDERCUT DIAMETER0.288 INCHES NOMINAL IN
POSITIVE LOCK STUD SHANK STYLESTUD SHANK
MAJOR DIAMETER LENGTH0.262 INCHES NOMINAL IN
SHOULDER HEIGHT0.186 INCHES NOMINAL IN
STUD SHANK HOLE DEPTH0.312 INCHES NOMINAL IN
END OVERALL LENGTH0.612 INCHES NOMINAL IN
STUD SHANK HOLE DIAMETER0.187 INCHES NOMINAL IN
MATERIALALUMINUM ALLOY OVERALL
STUD SHANK OVERALL HEIGHT0.356 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5325 — Fastening Devices
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5325-00-000-1884 5325-00-000-9988 5325-00-001-1567 5325-00-001-2043 5325-00-001-3842 5325-00-001-3858 5325-00-001-3871 5325-00-001-4317
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 872640?
872640 is a STUD,POSITIVE LOCK.
What is the NSN for 872640?
872640 is cataloged in the U.S. Government catalog under NSN 5325-00-202-1579. 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.