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128BSTM4 — WASHER,SPRING TENSION

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

128BSTM4: WASHER,SPRING TENSION.

The WASHER,SPRING TENSION is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304 OVERALL, hole_diameter: 4.1 MILLIMETERS NOMINAL MM, outside_diameter: 7.6 MILLIMETERS NOMINAL MM, material_thickness: 0.8 MILLIMETERS NOMINAL MM, end_item_identification: MRAP - COMMON NSN - USED ON CAIMAN PLUS CAT I AND 3 OTHER WEAPON SYSTEMS. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-333-5517, 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
128BSTM4
NSN: 5310-01-333-5517
FSC: 5310 — Nuts and Washers
CAGE: 15526 — METRIC AND MULTISTANDARD COMPONENTS CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 304 OVERALL
hole_diameter4.1 MILLIMETERS NOMINAL MM
outside_diameter7.6 MILLIMETERS NOMINAL MM
material_thickness0.8 MILLIMETERS NOMINAL MM
end_item_identificationMRAP - COMMON NSN - USED ON CAIMAN PLUS CAT I AND 3 OTHER WEAPON SYSTEMS
NSN5310-01-333-5517
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 128BSTM4 · 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
•
OUTSIDE DIAMETER: 7.6 MILLIMETERS NOMINAL MM
•
MATERIAL THICKNESS: 0.8 MILLIMETERS NOMINAL MM
•
MATERIAL: STEEL COMP 304 OVERALL
•
HOLE DIAMETER: 4.1 MILLIMETERS NOMINAL MM
TECHNICAL CHARACTERISTICS
OUTSIDE DIAMETER7.6 MILLIMETERS NOMINAL MM
MATERIAL THICKNESS0.8 MILLIMETERS NOMINAL MM
END ITEM IDENTIFICATIONMRAP - COMMON NSN - USED ON CAIMAN PLUS CAT I AND 3 OTHER WEAPON SYSTEMS
MATERIALSTEEL COMP 304 OVERALL
HOLE DIAMETER4.1 MILLIMETERS NOMINAL MM
SUBSTITUTES & CROSS-REFERENCES 4
12414560-009Reference document
Same NSN cross-reference
Reference document — Secondary reference
DIN 128 ST 4Reference document
Same NSN cross-reference
Reference document — Secondary reference
917706Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
12414560Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 128BSTM4?
128BSTM4 is a WASHER,SPRING TENSION.
What parts can replace 128BSTM4?
There are 4 known substitutes for 128BSTM4: 12414560-009, DIN 128 ST 4, 917706 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 128BSTM4?
128BSTM4 is cataloged in the U.S. Government catalog under NSN 5310-01-333-5517. 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.