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Technical Data Sheet
PartsTable / COMPONENT / PL-21-3
PL-21-3 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, head_style: FILLISTER, head_height: 0.188 INCHES NOMINAL IN, thread_class: 2A A, head_diameter: 0.375 INCHES NOMINAL IN, thread_length: 0.250 INCHES MINIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-841-2680, 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
PL-21-3
NSN: 5305-00-841-2680
FSC: 5305
CAGE: 57550 — RELLI TECHNOLOGY, INC DBA RELLI TECHNOLOGY INC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
head_styleFILLISTER
head_height0.188 INCHES NOMINAL IN
thread_class2A A
head_diameter0.375 INCHES NOMINAL IN
thread_length0.250 INCHES MINIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length0.625 INCHES NOMINAL IN
shoulder_length0.250 INCHES NOMINAL FIRST SHOULDER IN
thread_directionRIGHT-HAND
shoulder_diameter0.250 INCHES NOMINAL FIRST SHOULDER IN
surface_treatmentPASSIVATE OVERALL
NSN5305-00-841-2680
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: PL-21-3 · 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
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
THREAD SERIES DESIGNATOR: UNF
•
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
•
THREAD QUANTITY PER INCH: 32
•
THREAD LENGTH: 0.250 INCHES MINIMUM IN
•
THREAD CLASS: 2A A
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTPASSIVATE OVERALL
MATERIALSTEEL CORROSION RESISTING OVERALL
NOMINAL THREAD DIAMETER0.190 INCHES IN
THREAD SERIES DESIGNATORUNF
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
THREAD QUANTITY PER INCH32
THREAD LENGTH0.250 INCHES MINIMUM IN
THREAD CLASS2A A
FASTENER LENGTH0.625 INCHES NOMINAL IN
HEAD HEIGHT0.188 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
4330Interchangeable
interchangeable cross-reference
interchangeable
114B7017-3Interchangeable
interchangeable cross-reference
interchangeable
2902Interchangeable
interchangeable cross-reference
interchangeable
M2968Interchangeable
interchangeable cross-reference
interchangeable
313-001-001Interchangeable
interchangeable cross-reference
interchangeable
93J1R0Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is PL-21-3?
PL-21-3 is a SCREW,SHOULDER.
What parts can replace PL-21-3?
There are 15 known substitutes for PL-21-3: 4330, 114B7017-3, 2902 and 12 more. Substitute compatibility should be verified for your specific system.
Is PL-21-3 still available?
PL-21-3 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026