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Technical Data Sheet
PartsTable / COMPONENT / PWA55981-11
PWA55981-11 ✓ 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 STUD,PLAIN is a the manufacturer industrial component. Key specifications include thread_class: 2A STUD THREAD A, thread_length: 0.900 INCHES NOMINAL NUT THREAD IN, overall_length: 2.000 INCHES NOMINAL IN, thread_direction: RIGHT-HAND NUT THREAD, nominal_thread_size: 0.250 INCHES NUT THREAD IN, thread_quantity_per_inch: 20 NUT THREAD. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5307-01-381-3805, 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
PWA55981-11
NSN: 5307-01-381-3805
FSC: 5307
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
thread_class2A STUD THREAD A
thread_length0.900 INCHES NOMINAL NUT THREAD IN
overall_length2.000 INCHES NOMINAL IN
thread_directionRIGHT-HAND NUT THREAD
nominal_thread_size0.250 INCHES NUT THREAD IN
thread_quantity_per_inch20 NUT THREAD
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) NUT THREAD
NSN5307-01-381-3805
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: PWA55981-11 · 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
•
THREAD LENGTH: 0.900 INCHES NOMINAL STUD THREAD IN
•
THREAD QUANTITY PER INCH: 20 STUD THREAD
•
THREAD CLASS: 2A STUD THREAD A
•
NOMINAL THREAD SIZE: 0.250 INCHES NUT THREAD IN
•
THREAD DIRECTION: RIGHT-HAND NUT THREAD
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC) NUT THREAD
TECHNICAL CHARACTERISTICS (FLIS)
THREAD LENGTH0.900 INCHES NOMINAL STUD THREAD IN
THREAD QUANTITY PER INCH20 STUD THREAD
THREAD LENGTH0.900 INCHES NOMINAL NUT THREAD IN
THREAD CLASS2A STUD THREAD A
NOMINAL THREAD SIZE0.250 INCHES NUT THREAD IN
THREAD DIRECTIONRIGHT-HAND NUT THREAD
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC) NUT THREAD
OVERALL LENGTH2.000 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND STUD THREAD
NOMINAL THREAD SIZE0.250 INCHES STUD THREAD IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
9451Interchangeable
interchangeable cross-reference
interchangeable
5305M1TX9Interchangeable
interchangeable cross-reference
interchangeable
5305X1Interchangeable
interchangeable cross-reference
interchangeable
5305Interchangeable
interchangeable cross-reference
interchangeable
1377-M275Interchangeable
interchangeable cross-reference
interchangeable
M1A1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is PWA55981-11?
PWA55981-11 is a STUD,PLAIN.
What parts can replace PWA55981-11?
There are 18 known substitutes for PWA55981-11: 9451, 5305M1TX9, 5305X1 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for PWA55981-11?
PWA55981-11 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5307-01-381-3805. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026