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121939 — WASHER,FLAT

✓ Government record, cited
Hama · NUT WASHER
PRODUCT OVERVIEW

121939: WASHER,FLAT.

The WASHER,FLAT is a Hama industrial component. Key specifications include width: 8.500 INCHES NOMINAL IN, length: 11.000 INCHES NOMINAL IN, material: STEEL OVERALL, nut_style: HEXAGON, nut_height: 0.375 INCHES NOMINAL IN, usage_form: SHEET. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-447-9380, 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
121939
NSN: 5310-00-447-9380
NIINs: 004479380, 016082881, 016567837
FSC: 5310 — Nuts and Washers
CAGE: 08683 — BROCKWAY MOTOR TRUCKS DIV OF MACK TRUCKS INC (USA)
SPECIFICATIONS
width8.500 INCHES NOMINAL IN
length11.000 INCHES NOMINAL IN
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.375 INCHES NOMINAL IN
usage_formSHEET
specific_useDEXTEROUS PAPER DESIGNED TO RUN ON DIGITAL AND OFFSET EQUIPMENT INCLUDING HIGH-SPEED PRINTERS, COPIERS AND DIGITAL PRESSES
special_featuresGRADE A; WIDTH: 0.93 INCHES; LENGTH: 1.067 INCHES; IN
surface_treatmentZINC OVERALL
nominal_thread_size0.625 INCHES IN
part_name_assigned_by_controlling_agencyJAM NUT
NSN5310-00-447-9380
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 121939 · Hama ⚠ 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
•
OVERALL DIAMETER: 0.500 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: C-F-206,TYPE 1,CL 16R3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
MINIMUM TENSILE STRENGTH: 400 POUNDS PER SQUARE INCH LBS
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: WOOL COMP 16R3 OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.310 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER0.500 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONC-F-206,TYPE 1,CL 16R3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MINIMUM TENSILE STRENGTH400 POUNDS PER SQUARE INCH LBS
PERIPHERAL SHAPE STYLEROUND
MATERIALWOOL COMP 16R3 OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.310 INCHES NOMINAL IN
THICKNESS0.090 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 2
CT57-19Reference document
Same NSN cross-reference
Reference document — Secondary reference
412368Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 121939?
121939 is a WASHER,FLAT manufactured by Hama.
What parts can replace 121939?
There are 2 known substitutes for 121939: CT57-19, 412368. Substitute compatibility should be verified for your specific system.
What is the NSN for 121939?
121939 is cataloged in the U.S. Government catalog under NSN 5310-00-447-9380. This indicates validated use in U.S. government and defense supply chains.
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