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11BQ193 — WASHER,KEYWAY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

11BQ193: WASHER,KEYWAY.

The WASHER,KEYWAY is a the manufacturer industrial component. Key specifications include hole_diameter: 3.566 INCHES MINIMUM AND 3.572 INCHES MAXIMUM IN, hardness_rating: 89.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 91.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM, outside_diameter: 5.250 INCHES NOMINAL IN, special_features: CENTER HOLE DEE SHAPE WITH 3.374 IN. FROM FLAT TO ID IN, features_provided: CASEHARDENED, material_thickness: 0.250 INCHES NOMINAL IN.

This part is cataloged in the U.S. Government catalog under NSN 5310-00-736-5452, 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
11BQ193
NSN: 5310-00-736-5452
FSC: 5310 — Nuts and Washers
CAGE: 76040 — MACK TRUCKS INC PARTS OPN (USA)
SPECIFICATIONS
materialSTEEL COMP 1010 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OVERALL
hole_diameter3.566 INCHES MINIMUM AND 3.572 INCHES MAXIMUM IN
hardness_rating89.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 91.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM
outside_diameter5.250 INCHES NOMINAL IN
special_featuresCENTER HOLE DEE SHAPE WITH 3.374 IN. FROM FLAT TO ID IN
features_providedCASEHARDENED
material_thickness0.250 INCHES NOMINAL IN
external_keyway_width0.328 INCHES NOMINAL IN
external_keyway_length0.289 INCHES NOMINAL IN
external_keyway_quantity12
material_document_and_classificationASTM A108 ASSN STD ALL MATERIAL RESPONSES OVERALL
NSN5310-00-736-5452
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 11BQ193 · 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
•
EXTERNAL KEYWAY WIDTH: 0.328 INCHES NOMINAL IN
•
EXTERNAL KEYWAY QUANTITY: 12
•
HARDNESS RATING: 89.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 91.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A108 ASSN STD ALL MATERIAL RESPONSES OVERALL
•
OUTSIDE DIAMETER: 5.250 INCHES NOMINAL IN
•
FEATURES PROVIDED: CASEHARDENED
•
MATERIAL THICKNESS: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
EXTERNAL KEYWAY WIDTH0.328 INCHES NOMINAL IN
EXTERNAL KEYWAY QUANTITY12
HARDNESS RATING89.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 91.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A108 ASSN STD ALL MATERIAL RESPONSES OVERALL
OUTSIDE DIAMETER5.250 INCHES NOMINAL IN
FEATURES PROVIDEDCASEHARDENED
MATERIAL THICKNESS0.250 INCHES NOMINAL IN
SPECIAL FEATURESCENTER HOLE DEE SHAPE WITH 3.374 IN. FROM FLAT TO ID IN
MATERIALSTEEL COMP 1010 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OVERALL
HOLE DIAMETER3.566 INCHES MINIMUM AND 3.572 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 1
7365452Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 11BQ193?
11BQ193 is a WASHER,KEYWAY.
What parts can replace 11BQ193?
There is 1 known substitute for 11BQ193: 7365452. Substitute compatibility should be verified for your specific system.
What is the NSN for 11BQ193?
11BQ193 is cataloged in the U.S. Government catalog under NSN 5310-00-736-5452. 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.