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R938 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The CHUCK,DRILL is a the manufacturer industrial component. Key specifications include height: 0.438 INCHES NOMINAL IN, diameter: 0.621 INCHES MINIMUM AND 0.623 INCHES MAXIMUM IN, material: STEEL OVERALL, head_style: ROUND W/WRENCH FLATS CHAMFERED, chamfer_length: 0.031 INCHES NOMINAL IN, style_designator: STRAIGHT. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-164-9515, 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
R938
NSN: 5315-00-164-9515
FSC: 5315
CAGE: 09348 — LUCAS WESTERN INC (USA)
SPECIFICATIONS
height0.438 INCHES NOMINAL IN
diameter0.621 INCHES MINIMUM AND 0.623 INCHES MAXIMUM IN
materialSTEEL OVERALL
head_styleROUND W/WRENCH FLATS CHAMFERED
chamfer_length0.031 INCHES NOMINAL IN
style_designatorSTRAIGHT
features_providedCASEHARDENED
pin_chamfer_angle45.0 DEGREES NOMINAL
pin_head_diameter1.000 INCHES NOMINAL IN
under_head_length1.688 INCHES NOMINAL IN
width_across_flats0.364 INCHES MINIMUM AND 0.366 INCHES MAXIMUM IN
material_document_and_classificationSD 3017 AV FSCM 09348 MFR REF SINGLE MATERIAL RESPONSE OVERALL
NSN5315-00-164-9515
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: R938 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
UNDER HEAD LENGTH: 1.688 INCHES NOMINAL IN
•
DIAMETER: 0.621 INCHES MINIMUM AND 0.623 INCHES MAXIMUM IN
•
PIN HEAD DIAMETER: 1.000 INCHES NOMINAL IN
•
CHAMFER LENGTH: 0.031 INCHES NOMINAL IN
•
HEAD STYLE: ROUND W/WRENCH FLATS CHAMFERED
•
FEATURES PROVIDED: CASEHARDENED
•
WIDTH ACROSS FLATS: 0.364 INCHES MINIMUM AND 0.366 INCHES MAXIMUM IN
•
PIN CHAMFER ANGLE: 45.0 DEGREES NOMINAL
TECHNICAL CHARACTERISTICS (FLIS)
UNDER HEAD LENGTH1.688 INCHES NOMINAL IN
DIAMETER0.621 INCHES MINIMUM AND 0.623 INCHES MAXIMUM IN
PIN HEAD DIAMETER1.000 INCHES NOMINAL IN
CHAMFER LENGTH0.031 INCHES NOMINAL IN
HEAD STYLEROUND W/WRENCH FLATS CHAMFERED
FEATURES PROVIDEDCASEHARDENED
WIDTH ACROSS FLATS0.364 INCHES MINIMUM AND 0.366 INCHES MAXIMUM IN
PIN CHAMFER ANGLE45.0 DEGREES NOMINAL
HEIGHT0.438 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
02056Interchangeable
interchangeable cross-reference
interchangeable
33B 3/8-24Interchangeable
interchangeable cross-reference
interchangeable
33BInterchangeable
interchangeable cross-reference
interchangeable
500228K1Interchangeable
Same NIIN cross-reference
interchangeable
1X13653Interchangeable
Same NIIN cross-reference
interchangeable
510799K1Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is R938?
R938 is a CHUCK,DRILL.
What parts can replace R938?
There are 6 known substitutes for R938: 02056, 33B 3/8-24, 33B and 3 more. Substitute compatibility should be verified for your specific system.
Is R938 still available?
R938 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