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PA1538 — STUD,PLAIN

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

PA1538: STUD,PLAIN.

The STUD,PLAIN is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY K-500, overall_length: 4.000 INCHES NOMINAL IN, nominal_thread_size: 0.250 INCHES NUT THREAD A IN, thread_quantity_per_inch: 28 NUT THREAD, thread_series_designator: UNF LOCATION NOT OTHERWISE SPECIFIED. This part is cataloged in the U.S.

Government catalog under NSN 5307-01-407-3965, 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
PA1538
NSN: 5307-01-407-3965
FSC: 5307 — Studs
CAGE: 55444 — COOPER VALVE CO DIV OF TEXSTREAM (USA)
SPECIFICATIONS
materialNICKEL ALLOY K-500
overall_length4.000 INCHES NOMINAL IN
nominal_thread_size0.250 INCHES NUT THREAD A IN
thread_quantity_per_inch28 NUT THREAD
thread_series_designatorUNF LOCATION NOT OTHERWISE SPECIFIED
NSN5307-01-407-3965
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: PA1538 · 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
•
NOMINAL THREAD SIZE: 0.250 INCHES NUT THREAD IN
•
THREAD QUANTITY PER INCH: 28 NUT THREAD A
•
MATERIAL: NICKEL ALLOY K-500
•
THREAD SERIES DESIGNATOR: UNF LOCATION NOT OTHERWISE SPECIFIED
TECHNICAL CHARACTERISTICS
OVERALL LENGTH4.000 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.250 INCHES NUT THREAD IN
NOMINAL THREAD SIZE0.250 INCHES NUT THREAD A IN
THREAD QUANTITY PER INCH28 NUT THREAD A
THREAD QUANTITY PER INCH28 NUT THREAD
MATERIALNICKEL ALLOY K-500
THREAD SERIES DESIGNATORUNF LOCATION NOT OTHERWISE SPECIFIED
OTHER ITEMS IN FSC 5307 — Studs
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5307-00-000-6436 5307-00-001-1578 5307-00-001-1761 5307-00-001-2366 5307-00-001-4491 5307-00-001-4624 5307-00-001-4625
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 PA1538?
PA1538 is a STUD,PLAIN.
What is the NSN for PA1538?
PA1538 is cataloged in the U.S. Government catalog under NSN 5307-01-407-3965. 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.