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Technical Data Sheet
PartsTable / COMPONENT / 193257
193257 ✓ 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 PISTON,VALVE is a the manufacturer industrial component. Key specifications include special_features: MAGNETIC PERMEABILITY SHALL NOT EXCEED 2.0 AFTER FABRICATION; CONE SHAPED. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-019-3257, 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
193257
NSN: 5305-00-019-3257
FSC: 5305
CAGE: 56442 — DIAMOND REO TRUCK CO (USA)
SPECIFICATIONS
special_featuresMAGNETIC PERMEABILITY SHALL NOT EXCEED 2.0 AFTER FABRICATION; CONE SHAPED
NSN5305-00-019-3257
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 193257 · 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 DIRECTION: RIGHT-HAND
•
THREAD CLASS: 2A A
•
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633-CANCELLED FED SPEC 1ST MATERIAL RESPONSE OR QQ-W-409,GRADE 2,3 OR 4 FED SPEC 2ND MATERIAL RESPONSE
•
HEAD DIAMETER: 0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.250 INCHES NOMINAL IN
•
SCREW SURFACE TREATMENT: CADMIUM AND CHROMATE OR ZINC AND CHROMATE
•
HEAD STYLE: PAN NO. 2
•
SCREW MATERIAL: STEEL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
THREAD CLASS2A A
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633-CANCELLED FED SPEC 1ST MATERIAL RESPONSE OR QQ-W-409,GRADE 2,3 OR 4 FED SPEC 2ND MATERIAL RESPONSE
HEAD DIAMETER0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
FASTENER LENGTH0.250 INCHES NOMINAL IN
SCREW SURFACE TREATMENTCADMIUM AND CHROMATE OR ZINC AND CHROMATE
HEAD STYLEPAN NO. 2
SCREW MATERIALSTEEL
NOMINAL THREAD DIAMETER0.138 INCHES IN
INTERNAL DRIVE STYLESLOT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
193257Interchangeable
interchangeable cross-reference
interchangeable
2002955Interchangeable
interchangeable cross-reference
interchangeable
10-91243-4Interchangeable
interchangeable cross-reference
interchangeable
F54Interchangeable
interchangeable cross-reference
interchangeable
BM-190273 ITEM 5VMInterchangeable
interchangeable cross-reference
interchangeable
BM-190273 ITEM 5Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 193257?
193257 is a PISTON,VALVE.
What parts can replace 193257?
There are 10 known substitutes for 193257: 193257, 2002955, 10-91243-4 and 7 more. Substitute compatibility should be verified for your specific system.
Is 193257 still available?
193257 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