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Technical Data Sheet
PartsTable / COMPONENT / PQ-29-3
PQ-29-3 ✓ 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 THUMBSCREW is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, head_style: KNURLED NO. 1, head_height: 0.188 INCHES NOMINAL IN, point_style: FLAT, thread_class: 2A A, head_diameter: 0.375 INCHES NOMINAL IN.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-226-9461, 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
PQ-29-3
NSN: 5305-01-226-9461
FSC: 5305
CAGE: 29440 — W. M. BERG, INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
head_styleKNURLED NO. 1
head_height0.188 INCHES NOMINAL IN
point_styleFLAT
thread_class2A A
head_diameter0.375 INCHES NOMINAL IN
thread_length0.625 INCHES NOMINAL IN
fastener_length0.750 INCHES NOMINAL IN
hardness_rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
special_featuresSTRAIGHT KNURL
thread_directionRIGHT-HAND
nominal_thread_diameter0.190 INCHES IN
NSN5305-01-226-9461
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: PQ-29-3 · 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
•
THREAD LENGTH: 0.625 INCHES NOMINAL IN
•
THREAD SERIES DESIGNATOR: UNF
•
THREAD CLASS: 2A A
•
HEAD STYLE: KNURLED NO. 1
•
POINT STYLE: FLAT
•
HEAD HEIGHT: 0.188 INCHES NOMINAL IN
•
HEAD DIAMETER: 0.375 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD LENGTH0.625 INCHES NOMINAL IN
THREAD SERIES DESIGNATORUNF
THREAD CLASS2A A
HEAD STYLEKNURLED NO. 1
SPECIAL FEATURESSTRAIGHT KNURL
POINT STYLEFLAT
HEAD HEIGHT0.188 INCHES NOMINAL IN
HEAD DIAMETER0.375 INCHES NOMINAL IN
MATERIALSTEEL COMP 303 OVERALL
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
21329-632-9Interchangeable
interchangeable cross-reference
interchangeable
503823-000Interchangeable
interchangeable cross-reference
interchangeable
4038Interchangeable
interchangeable cross-reference
interchangeable
91J2R2Interchangeable
interchangeable cross-reference
interchangeable
21748Interchangeable
interchangeable cross-reference
interchangeable
L-4038Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is PQ-29-3?
PQ-29-3 is a THUMBSCREW.
What parts can replace PQ-29-3?
There are 17 known substitutes for PQ-29-3: 21329-632-9, 503823-000, 4038 and 14 more. Substitute compatibility should be verified for your specific system.
Is PQ-29-3 still available?
PQ-29-3 is currently cancelled.
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PartsTable Design LLC · partstable.com
Last verified: July 2026